Homemade aluminum-air battery I - high power

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Simple but powerful battery can be done using some materials from the kitchen: aluminum foil, paper for a membrane, active carbon for an air electrode, and an iron mesh for a current collector. The Al-air battery is more energy dense than a Li-ion battery.
In the chemical equation the redox potential should be -2.3 V instead of -1.66 V.
This aluminum-air battery was designed by Tavo Romann (PhD).
The preparation of the air cathode is described in the new version of aluminum-air battery video: • Al-air battery - car r...
The carbon electrodes can be also obtained from www.superaccu....
See also our other electrochemistry experiments:
Homemade supercapacitor • Tic-Tac supercapacitor...
Microbial fuel cell • Microbial fuel cell - ...
Making sodium • Making sodium via elec...
la batería de aluminio-aire
铝空气电池
bateria de alumínio-ar
алюминиево-воздушной батарее
Aluminium-Luft-Batterie
batterie aluminium-air
batteria di alluminio-air
алюмінієво-повітряної батареї
aluminium-õhk patarei

Опубликовано:

30 сен 2024

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Комментарии : 448

@saikittang7450 8 лет назад

your videos rock, you deserve more subs

@chemicum 8 лет назад

+Saikit Tang thanks

@jimandaubz 5 лет назад

Fantastic! Thank you 😁 this is awesome, I cannot wait to show my children. I did not know this was an excellent source of electrical energy so cool!

@attilazk 5 лет назад

Then first know what harm could NaOH cause to yor children. If you don't know, then read the labels on a drain cleaner. I wouldn't let my children play with it.

@haze541bsn 8 лет назад

wow 1.5+ volts that is the highest power homemade battery I have seen anywhere and especially to be that size a tic tac case I can only imagine what you could do with a few of them some in series to increase voltage then wire each pair in parallel to double the maH they could be very useful damn them lemon batteries you would need 20 of them to create the power you did with just one of your design...wow new subscriber earned

@enlightenedillumination 4 года назад

You must never seen magnesium and carbon together

@haze541bsn 4 года назад

@@enlightenedillumination no actually I haven't had the pleasure I will look it up and see if I can somehow put it to good use thanks

@enlightenedillumination 4 года назад

@@haze541bsn I will be covering the magnesium air battery soon on my channel as well as other good to know things for every day or emergency needs.. hope you stop by.

@haze541bsn 4 года назад

@@enlightenedillumination most definitely thank you for the reply notification bell is on

@enlightenedillumination 4 года назад

@@haze541bsn awesome. Now I really gotta get back to work, its really a hybrid channel hope you like the mix of content I release

@chemicum 8 лет назад

New aluminum-air battery video is here ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-fcLZ6dM-qIU.html

@diehardAMD 4 года назад

That's not HIGH POWER by definition in Electrical Engineering. That will struggle to charge smart phones but bar phones should be acceptable. You should have added more cells.

@chemicum 4 года назад

No, it is not. But it is good compared to 3 mA for a homemade lemon battery.

@alleyssasyafinas 3 года назад

Hi i want to ask , how much voltage and current will get if making 8 cells in series ?

@chemicum 3 года назад

Hi, if these are tic tac 100 sized cells and cathodes are as good as here and electrolyte is 10% NaOH then 1A and 1V per cell - in series 8 V and 1 A (but for a minute only, then current will fall several times). With more advanced cathodes (superaccu.com) 1.1 V and 2 A per cell several hours straight. With more advanced cathode and anode (superaccu.com) 1.4 V and 2 A per cell several hours.

@alleyssasyafinas 3 года назад

@@chemicum thank you so much !!

@dkjawahar-techexpt671 Год назад

Nice work, thanks for your effort taken to spread your gained valuable experience, from Jawaharlal Bharat INDIA 🙏

@JohnKuhles1966 18 дней назад

Elon Musk not interested?

@chemicum 18 дней назад

Tesla has a patent to use aluminum-air battery as a range extender for electric cars.

@tdx110 2 года назад

"The Al-air battery is more energy dense than a Li-ion battery. " That's right. Too bad the aluminum-air battery cannot be recharged.

@hermanrosenblat1969 5 лет назад

Sorry again, any benefits if I keep laying (4 cathodes and 2 anodes ) in the one box? More amps? Or better to use many boxs?

@chemicum 5 лет назад

Better is to use many boxes and connect these in series to have higher voltage output.

@artofwebdesign Год назад

Overall the reaction looks like literally burning the Aluminium. Al + O2 I tried it and the Aluminium burns quickly.... Is it reversible ?

@chemicum Год назад

The electroreduction of aluminum compounds to aluminum metal is only possible in nonaqueous electrolytes

@shuvojitpaul1345 6 лет назад

It's an amazing battery and we did it, using just one cell to rotate motor,

@chemicum 6 лет назад

Shubhojit paul how many Ampers did u get

@shuvojitpaul1345 6 лет назад

It was 650 mA

@chemicum 6 лет назад

Shubhojit paul good job

@shuvojitpaul1345 6 лет назад

Thank u,,, your video helped a lot,, 😊😊

@nandubandu7602 4 года назад

NAOH sodium hydro oxide?

@chemicum 4 года назад

sodium hydroxide yes

@omsingharjit 4 года назад

Why it's called air battery

@chemicum 4 года назад

because one of the reactants is air oxygen reacting at cathode. Aluminum reacts at anode.

@sathyanarayana7797 5 лет назад

Sodium hydroxide is toxic and its high enough cause tissue damage. How to neutralize toxic and damage to human and nature/environment. is there any nature friendly chemicals exists ?

@chemicum 5 лет назад

I think toxic is not correct word - it is corrosive. Can be neutralized with acetic acid. However, it is used as sewage cleaning liquid so there is not problem to flush it in toilet

@georg841984 7 лет назад

i only get them up to 0.9v but i use salt water the anodes live allot longer and drive an led for months :-) i also use 3 in series and build them in jam jars

@chemicum 7 лет назад

It is so, I know

@daninjapan3092 7 лет назад

Months is a pretty good self discharge rate, have you measured mAh and weight from one of your setups?

@Wingnut353 5 лет назад

@@daninjapan3092 I mean driving an LED isn't super taxing to begin with... especially if using a joule thief circuit.

@alexanderbell7746 2 года назад

the problem are how long the life of battery ? 2 minutes no more charge or i 1 day battery are totaly exposed

@chemicum 2 года назад

Depends on the electrolyte and purity of Al. Worst case scenario is indeed a few minutes; however, we have used some configuration full day at constant power.

@kirdellsuraz278 2 года назад

My question is how long does it last before it goes dead and if you scale this up to like lets say 4 foot by 2 foot what voltage you would get how much amps it would put out and how long would it last before going dead

@chemicum 2 года назад

Depends, directly this homemade version won't last long but we have already made modifications , so that it can last for a day.

@hasan24253 2 года назад

Normally it will last until the Aluminum finish.

@chemecar1536 8 лет назад

Thank you for your video! I have a question, when I tried to replicate your battery we only get a current of about 20 mA. (voltage is about 1 V) What things can I do to increase the current? I am using steel wool for the current collector which I found to work better than stainless steel mesh and probably a higher concentration of NaOH than you used.

@chemicum 8 лет назад

+Z Zegers You can try adding activated carbon to the steel wool. It could be a good composite. I bought some steel wool for battery experiments but haven't tested it so far

@chemecar1536 8 лет назад

+chemicum I am using activated carbon applied with epoxy in similar way that you do in the video to the steel wool. Does the type of epoxy matter?

@chemicum 8 лет назад

+Z Zegers I suggest using slower hard epoxy, but 5 min fast soft epoxy might work as well.

@NatureHacker 8 лет назад

your carbon pieces aren't big enough.

@singingzone3056 3 года назад

Is it rechargeable??

@chemicum 3 года назад

Mechanically - replace Al. Cathode is reuseable

@shahabuzafarzubaer6919 4 года назад

Where is written that 1.5 v electricity yielded, moreover what's the meaning of -1.66 v and +0.4 v there

@chemicum 4 года назад

These are half-reaction voltages. Sum these to get full voltage. However real voltage - 1.5 V is lower as efficiency is not 100%

@shahabuzafarzubaer6919 4 года назад

@@chemicum thanks for being replied, however how you calculate efficiency here and can you show me that efficiency is less than 100.

@chemicum 4 года назад

Theoretical voltage is 2.7 V (there is a mistake in the video), practical is up to 1.5 V. Thus efficiency is less than 1.5/2.7=56%

@daninjapan3092 7 лет назад

Have you tested the mAh of these and the weight? Im curious how high the wh/kg can get. These have to be used after putting in the electrolyte right as the aluminium starts degrading from the NaOH or KOH right?

@chemicum 6 лет назад

I will publish some results very soon, but corrosion is a problem for pure Al an a big problem for kitchen Al foil

@akhilsankar 5 лет назад

Why don't this method is not adopted to commercial applications?

@chemicum 5 лет назад

Currently there are some technical limitations. But in the future it probably will

@akhilsankar 5 лет назад

@@chemicum ok, I found this news today : Father-of-eight invents an electric car battery www.dailymail.co.uk/news/article-7592485/Father-eight-invents-electric-car-battery-drivers-1-500-miles-without-charging-it.html?ito=native_share_article-top Is it the same method?

@filmweaver2013 6 лет назад

I was relieved that he didn't spill NaOH...

@DavidDavid-ew9rb 2 года назад

sir how to make positive plate and negative plate for lead acid battery? and what is the name of active material for lead acid battery? ️🤔

@chemicum 2 года назад

lead and lead dioxide. Better reconstruct an old battery

@Tore_Lund Год назад

You simply make a lead acid battery from two identical pieces of lead in a Sulfuric acid electrolyte. Then repeated charging and discharging conditions one plate as positive forming PbO4 and some lead sulphate and the other as pure lead. Repeated cycling also make the electrode surfaces somewhat porous which increases capacity and power. Commercial lead acid batteries is made from a lead and lead oxide paste stamped onto a lead grid, to avoid that tedious repeated conditioning charging to get it going, but for DIY simply get some roofing lead and make a giant lead acid cell for cheaps.

@adeetjain2300 4 года назад

what is the name of the carbon electrode

@chemicum 4 года назад

cathode

@ashwingovekar2076 4 года назад

If I make 6 cell and connect in series what will be the total amps hour?? How to recharge metal air batteries??

@chemicum 4 года назад

6 cells average voltage 6 V, Ah depend on how proffessional are electrodes and design - could be within 0.2 and 50 Ah

@ryansutherland5628 8 лет назад

Brilliant! What is the approx specific energy?

@doiceslife8374 4 года назад

More efficient than lead acid, less efficient than lithium ion

@aldosebastian9457 9 месяцев назад

How did you make the carbon anode?

@chemicum 9 месяцев назад

see my other videos

@getreal155 6 лет назад

How long does the battery hold until the aluminium and steel will be totally corroded?

@chemicum 6 лет назад

we have had full day - 8h demonstration with pure Al. Steel won't corrode in hydroxide solution

@getreal155 6 лет назад

I'm confused. In electrolytic processes for making hydrogen or brown gas the electrodes have to be made of stainless steel. Other metals do corrode away in no time when submerged in hydroxide solutions. Looking at this setup my assumption would be that this situation is similar. Basically what happens is that electrons are passing from one electrode to the other. Can you please explain why you think your battery would function in any different way?

@chemicum 6 лет назад

getreal155 surely Al corrodes and dissolves, but in a controllable way. When electrochemical dissolution takes place it competes to and reduces the normal corrosion a lot (up to orders of magnitude).

@getreal155 6 лет назад

Ok. Clear. That was what I meant. So how long will it take before this battery will be dissolved from the inside. Weeks...months?

@ahmadfahmi7973 6 лет назад

Why I still got zero for current even though the voltage is 1.5

@chemicum 6 лет назад

Afrain AF It probably depends on quality of air electrode

@spectralspectra2282 3 года назад

can i use coppper instead of air? also can I use CuSO4 as my eletrolyte?

@chemicum 3 года назад

Copper would work as air electrode, albeit at very low current densities. But with CuSO4 it would be a battery and Cu would deposit on aluminum I think

@manganeseheptoxide7825 3 года назад

Aluminium would dissolve in CuSO4 solution and ppt out metallic copper. That would not work

@cahyomahardika2999 2 года назад

Can you charging this battery?

@chemicum 2 года назад

take new Al, cathode is reuseable

@VijayKumar-rj6sm Год назад

Gr8

@DavidDavid-ew9rb 2 года назад

Sir, can this cell be charged like a lithium ion battery? , and whether the electrolyte solution is other than NaOH 🤔

@chemicum 2 года назад

With aqueous NaOH electrolyte it is electrically not rechargeable. With AlC3-ionic liquid electrolyte, the Al.ion battery is rechargeable.

@bjl1000 6 лет назад

so where does someone get this NaCI and NaOH liquid?

@chemicum 6 лет назад

Frenchie NaCl is white powder in your kitchen. And look in WC or bathroom for NaCl solution, which is used to clean sewage pipes

@bjl1000 6 лет назад

@ thank you. How long before anode or cathode need replacement?

@hyperhektor7733 5 лет назад

there are different drain cleaners, look on the label whats inside. I found a really powerfull,cheap and simple one its a white powder(Sodium hydroxide) with some aluminium grains in it (~2-5% i guess)

@ingussilins6330 5 лет назад

Litle charging - NaCl converts to NaOH + Cl... its easy...

@syariefad456 3 года назад

How long... it can running??

@chemicum 3 года назад

depends on purity of aluminum. From 10 min to full day. Our new video describes preparation of rechargeable aluminum-ion battery ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-ARaWq5YMbeY.html

@sarveshkumar-vy7gp 4 года назад

Hi, you showed 1.54V than how it coming overall cell potential 2.71V

@chemicum 4 года назад

2.7V is theoretical voltage, 1.5 V is practical due to nonconducting aluminum oxide layer on aluminum. This is why it is not in market, but developments are going on

@korneld 9 лет назад

If you have acid in there, it's no longer an aluminum-air battery. sciencegeekgirl.com/documents/TPT_Salty_Science.pdf

@chemicum 9 лет назад

+korneld I understand that if you add hypochlorite - bleach (not definitely acid) or KMnO4 then it is not a metal-air battery, because it has a different oxidizer.

@korneld 9 лет назад

+chemicum Did you make those charcoal pads yourself or did you buy them somewhere?

@chemicum 9 лет назад

The air cathodes are made of activated carbon from a water filter, which is glued onto a kitchen strainer mesh with epoxy glue. All homemade stuff.

@NatureHacker 8 лет назад

air is a misnomer. Anything that uses carbon and aluminum is really just an aluminum carbon battery. Air isn't needed. If you pump oxygen into it, it will boost voltage from 1.4 to 1.6 but is not needed. Hydrogen peroxide does the same thing.

@JACVA1 5 лет назад

Is it possible to replace Al for Zn? Greetings from Ecuador!

@chemicum 5 лет назад

Sure, then it will be Zn-air battery

@hyperhektor7733 5 лет назад

what about cobalt,indium, molybdenum or tungsten?

@chemicum 5 лет назад

nope, these won't give high energy

@hyperhektor7733 5 лет назад

for indium,molybdenum or tungsten its seems logical since they have low potential but i looked up the galvanic there is once interesting candidate Co3+(aq) + e- -> Co2+(aq) 1.82 hyperphysics.phy-astr.gsu.edu/hbase/Tables/electpot.html

@hermanrosenblat1969 5 лет назад

Only put in small amount of fluid ..thus less wet surface area. 1. Would full tic tac vessel of fluid increase output on larger wet contact area? 2. How long before it goes flat like my old wife's chest. 3. When flat, how to recharge? Thank you for nice videos.

@chemicum 5 лет назад

No, because it would reduse flow of oxygen to the electrode. However, dropping new electrolyte constantly gives better results. At full power ~20 min or at low power using pure Al it lasts many hours. When it is done, open, soak cathode with water and dry. Next day, new battery can be assembled reusing the cathode.

@hermanrosenblat1969 5 лет назад

@@chemicum Hello again you very loving man. I just watched ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-Ar3C5JgzhgE.html He uses alloy and carbon, and does full wetness coverage like my old wife with full tube of ky love cream ... but turns into a capacitor that needs external charging first (no fun in apocalypse). If I flood the tic tac box, then add external power, would yours act as capacitor? Sorry for silly questions. I am very old, out of love cream and almost dead.

@zalaluddin7911 6 лет назад

How can one know how long the battery will run? Does it depend on the amount of electrolyte.?

@chemicum 6 лет назад

Just connector a motor and see yourself. Adding electrolyte after each X min will increase lifetime.

@ArpitKumar-xw8eg 5 лет назад

How to get that cathode

@chemicum 5 лет назад

superaccu.com

@bostonmataxi 4 года назад

What could you do with a steel pipe stuffed with squished tin cans?

@chemicum 4 года назад

@rolandruiz1972 5 лет назад

ist rechargeable?

@chemicum 5 лет назад

Richelle Channel only mechanically, add new Aluminum

@brianevolved2849 3 года назад

did you discharge recharge discharge

@chemicum 3 года назад

only discharge. In aqueous solution, charging is only possible with zinc.

@brianevolved2849 3 года назад

@@chemicum many thanks for your reply live long and prosper sustainability

@unknownskyman2156 5 лет назад

Very cool!

@rayxred 5 лет назад

what paper did you use

@chemicum 5 лет назад

Just something stronger than toilet paper

@DavidDavid-ew9rb 2 года назад

sir what is the name of the electrolyte solution used for lithium ion battery 🤔

@chemicum 2 года назад

mixture of ethylene and propylene carbonate

@DavidDavid-ew9rb 2 года назад

@@chemicum how to make ? , is it for sale ? 🤔

@chemicum 2 года назад

@@DavidDavid-ew9rb only specialized chemical companies sell it

@DavidDavid-ew9rb 2 года назад

@@chemicum because I have a used laptop battery, I tested using a multi meter, there is no more voltage, I mean I want to fill the lithium ion battery electrolyte, who knows after filling the electrolyte the battery can still be used again 😅

@chemicum 2 года назад

@@DavidDavid-ew9rb that is tricky, it would need an argon glove box. Besides, probably electrodes are in worst shape

@CUBETechie 4 года назад

Na2CO3 ist maybe better and not so aggressive

@Stayingfrostee 5 лет назад

Congrats on all your accomplishments! Idk if I should belive the news about the multimillion dollar deal, but if it's true, congrats sir!

@chemicum 5 лет назад

probably not true

@Hexauslion 4 года назад

@@chemicum well it is true. the deal was signed

@TemplarX2 5 лет назад

How exactly did you make that carbon electrode? Also doesn't aluminium quickly form an oxide layer to protect it from corrosion?

@chemicum 5 лет назад

Look my 2nd Al-air battery video

@flash_alexander 5 лет назад

@@chemicum How can i PM you?

@luisaparish6897 9 лет назад

Hi where did you get the carbon electrolyte from?

@chemicum 5 лет назад

superaccu.com/energystorage.html

@marn200 3 года назад

@@chemicum link is dead

@chemicum 3 года назад

@@marn200 thanks, now it should work

@pinastop5dagohoy939 5 лет назад

Can it be recharged?

@chemicum 5 лет назад

Only mechanically - add new aluminum

@flash_alexander 5 лет назад

@chemicum How can i PM you ?

@chemicum 5 лет назад

KOKOU AFIDEGNON superaccu.com

@flash_alexander 5 лет назад

@@chemicum let me ask the first question, what's the energy density and for how long can it last? imagine i mounted this to power my laptop, in what time will it discharge compared to the normal Li-ion battery?

@chemicum 5 лет назад

Depends on design, Al-air can give at least twice energy density than Li-.ion. The single Tic-Tac cell is able to charge a mobile phone

@flash_alexander 5 лет назад

@@chemicum and how do i refuel/recharge?

@chemicum 5 лет назад

KOKOU AFIDEGNON add new Al

@martariverabargues1214 6 лет назад

If you use bigger dimensions of the components you get more power? Or is it better to connect smaller ones?

@chemicum 6 лет назад

Marta Rivera Bargues both ways. However, some stuff needs higher voltage so series connection would be preferred

@suzonryginloveg.7364 2 года назад

ok pom pom

@burningions 4 года назад

Where is the sodium????????????????????????????????????????????

@chemicum 4 года назад

In the safe

@burningions 4 года назад

Can you calculate the current that can be produced if the surface area is known

@chemicum 4 года назад

@@burningions Power is 20 mA cm-2 or 10x higher with newer prototypes

@burningions 4 года назад

Newer Prototype means? Any idea of electrolyte modification.

@chemicum 4 года назад

video coming soon.

@zombie-survivor 4 года назад

Dude, this is totaly wrong. This is Galvanic cell, not Metal-air battery (a type of Fuel cell). Why do you add NaOH?, you should only add NaCl to make it Metal-air battery. NaOH will react with Al to make NaAlO2. Next time do your homework before uploading videos! Al-Galvanic cell: Al + NaOH + H2O → NaAlO2 + H2 Al-air battery: Al + O2 → Al2O3

@chemicum 4 года назад

any battery is galvanic cell, including this aluminum-air battery. If using high purity aluminum and high current density, it almost does not react with hydroxide. With NaOH this battery gives 1 W power, but we also tested that with NaCl electrolyte it gives 0.01 W only.

@ИванИванович-ы6щ6й 6 лет назад

никакая это не воздушная батарейка, у вас воздушный электрод погружен в воду и нет доступа воздуха. Батарейка работает на реакции алюминия и щелочи. Батарейка будет также работать без углерода. no it's not an air battery, you have an air electrode immersed in water and no air access. The battery works on the reaction of aluminum and alkali. Тhe battery will also work without carbon.

@Qifa80 5 лет назад

hello what's the name of things that u use to tie up all that stack

@chemicum 5 лет назад

Afiq Afiq polypropylene cloth / shade cloth. Could be repliced by other wire or string

@Qifa80 5 лет назад

can i use the same stacked-paper to tied up them?

@chemicum 5 лет назад

@@Qifa80 not sure. The idea is to use hydrophobic string to tie up so oxygen can pass to cathodes. If paper is wrapped around and covers all cathode then it will wet and stops oxygen diffusion

@Qifa80 5 лет назад

nice thanks

@AlekseyCamodelkin 6 лет назад

Good video

@YohanesIswantoMuna 7 лет назад

Awesome demonstration. You have my sub.

@jozefnovak7750 2 года назад

Super!

@s.sradon9782 6 лет назад

because naoh loves aluminium it dissolves it and that's why in the military they don't use this

@chemicum 6 лет назад

I think they do, in torpedoes for example

@luongmaihunggia 6 лет назад

Dude, not everything have to be related to the military, normal people can use them too.

@DFEUERMAN 5 лет назад

I believe a company, Ambri.com founded by an MIT professor, is building a liquid metal battery similar to this battery but at higher temperatures where the anode is liquid, and thus rechargeable, as a way to balance demand on the electrical grid

@ideafromkurdistan5257 3 года назад

Really or joke this ?

@zionassedo 6 лет назад

hi, i dont understand much but doest this have any relation with the car presented by the phynergy company ? i just read they made a join venture with a chinese alluminum producer, can you tell if this is the same process ?

@arifkorkmaz5630 2 года назад

al is make heater stove?

@NatureHacker 8 лет назад

900 milliamps from that small surface area? Thats a ton. I used copper and aluminum but got only about 20 ma from a piece that size. What do you think the issue is?

@chemicum 8 лет назад

Activated carbon has surface area of 1000 m2/g, but copper wire something like 0.01 m2/g.

@Ex-fk4nr 6 лет назад

Are this battery richargable?

@chemicum 6 лет назад

Noxge B only if Al is replaced mechanically (and Al2O3 can be electrolyzed back to Al in high temperature cryolite electrolyte)

@hyperhektor7733 5 лет назад

isnt there a limit how much aluminium fits inside the battery , lets say 10 aluminium sticks are dissolved already and you try more...

@R2NOTU 9 месяцев назад

Rechargeable?

@chemicum 9 месяцев назад

only mechanically

@R2NOTU 9 месяцев назад

@@chemicum then not electrically rechargeable . Thank you

@chemicum 9 месяцев назад

yeah, not directly electrically

@leadazid7141 6 лет назад

can i replace oxygen by KCLO3 ?

@chemicum 6 лет назад

It probably won't work, but it would be fun testing. Other oxidizers are known to work, such as KClO, H2O2, or KMnO4

@leadazid7141 6 лет назад

можно попробовать))

@chemicum 6 лет назад

ClO3 anion could be kinetically difficult to reduce, yet energetically it is a good choice. But I could be wrong

@leadazid7141 6 лет назад

hypochlorite will be just perfect for me , thanks

@happytime1533 5 лет назад

👍👍👍

@aimfany4213 5 лет назад

If I want to increase voltage can you explain please

@chemicum 5 лет назад

get better cathode, high purity aluminum

@aimfany4213 5 лет назад

If i want to connect serial circuit can I just add aluminum 1 piece

@chemicum 5 лет назад

Series connection needs 2 separate complete cells

@aimfany4213 5 лет назад

Should I add cathode? Or just add 1 Al and 2 sep

@chemicum 5 лет назад

Another cell including Tic-tac case, Al and 2 cathodes.

@hannnnn310 6 лет назад

Is this rechargeable

@chemicum 6 лет назад

New Generation Electricity only mechanically

@DFEUERMAN 5 лет назад

@emrekocamese3848 8 лет назад

tic-tac?

@batrisyiailmin7916 3 года назад

Why did my bulb didnt light up?

@chemicum 3 года назад

where did you put your bulb?

@batrisyiailmin7916 3 года назад

Im using my crocodile clip to connect with it

@chemicum 3 года назад

bulb or LED?

@batrisyiailmin7916 3 года назад

Both

@chemicum 3 года назад

How was cathode made?

@NoSkillsRequired 8 лет назад

nice video

@devenwarke5651 5 лет назад

Carried out the experiment.... Acquiring current is becoming a problem when connected in parallel... So what can be done in this regard?.... Voltage gained is 1.3V always..

@chemicum 5 лет назад

Current depends on the quality of the cathodes usually.

@leonardocanepa8318 8 лет назад

630 miliamps!!!!! thats unvelibable! i cant get more than 10 !!! i ll trie whith that mesh you use for steaking the carbon .congrats , great demostration..

@chemicum 8 лет назад

The data is real, for unbelievers there is a way to test themselves - the electrodes can be obtained for testing from superaccu.com

@tranhoang530 5 лет назад

What is the membrane used here?

@chemicum 5 лет назад

paper

@wilfredsteffenespejo8806 5 лет назад

@@chemicum what kind of paper is used?

@chemicum 5 лет назад

Wilfred Espejo tissue paper - a variety of paper types can be used

@rxz_k4341 Год назад

@@chemicum would parchment baking paper work?

@chemicum Год назад

@@rxz_k4341 No, I think it is waterproof

@neutronpcxt372 7 лет назад

Wow, just WOW!

@novrymahdevika5614 6 лет назад

What if i use aluminium plate instead of the foil? Can i get better result?

@chemicum 6 лет назад

Novry MAH maybe, some Al alloys give better results and higher purity Al is better

@novrymahdevika5614 6 лет назад

Oo i see.. the mesh you use for the air cathode, is that Aluminium or what? Any specified mesh size?

@chemicum 6 лет назад

Novry MAH it is steel, suitable hole size is 0.5-5mm

@novrymahdevika5614 6 лет назад

What if i use carbon rod as the air cathode?

@chemicum 6 лет назад

it works a bit, but don't expect more than 20 mA as it has low surface area

@willi3.mp4 9 лет назад

how much does it last before Al sheet is consumed? Can it be done with an thicker Al sheet?

@chemicum 9 лет назад

It lasts 20-40 minutes if using thinnest Al foil 10-20 um thick) and nearly full power. Thicker Al plates can be used to increase the lifetime, adding additional amount of electrolyte after 30 min, boosts power and voltage.

@zekeriasvarg530 9 лет назад

Standard reduction potential is an intensive property, meaning that changing the stoichiometric coefficient in a half reaction does not affect the value of the standard potential.

@chemicum 9 лет назад

There seems to be a mistake indeed, in reaction 1 the standard potential should be -2.3V. Thank you for noticing.

@leondies7813 7 лет назад

Thats not an air battery leave out the holes leave the activated charcoal out everything else the same and you will get the same results. Its called an earth battery and works between the copper wire and aluminum

@chemicum 7 лет назад

The earth battery is technically also an air battery - it is the oxygen reduction reaction that is taking place at cathode. Note that in a classical Zn/Cu element the Cu electrode is in CuSO4 solution, but there is no such thing in earth, lemon, etc. This aluminum-air battery gives nearly one amper due to high surface area of carbon, but with only current collector it would give only a few milliampers.

@wakarotz23081983 9 лет назад

hi.. how can you charge the aluminum? i want to ask if you have to change the aluminum every time the charge is finished?

@chemicum 9 лет назад

Indeed Al have to be replaced mechanically but the carbon cathode can be used many times. Yet it is several times more energy dense than lithium batteries. If it has to be electrically rechargeable then at home it is easier to build a supercapacitor ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-gTt_YBzJ_Dk.html

@michaellaw3688 6 лет назад

How to get the NaOH?

@chemicum 6 лет назад

Seach for sewage cleaning liquid in supermarkets

@michaellaw3688 6 лет назад

thank you

@jessyarroyo4728 5 лет назад

Buy drain cleaner

@kyap2759 7 лет назад

May I know the molarity of both electrolyte mixtures?

@chemicum 7 лет назад

They are both 10% so the molarity of NaOH is ~2.5 M and in the mixture it is 1.3 M.

@kyap2759 7 лет назад

+chemicum thank you! may I know if the thickness of aluminium foil (sandpapered) affects it? will the graphite electrode 'expire'? i tried with two cells and it provides approx 2.6 to 2.8 V. it did move my motor, however the next day we tried it, the motor didnt move anymore and the current level is low...

@chemicum 7 лет назад

2.6-2.8V? Two cells in series connection? Hydroxide absorbs CO2 from air and Al corrodes in NaOH - that is why it should be used up quickly.

@kyap2759 7 лет назад

+chemicum yeah two cells in different container, do i need to replace the graphite electrode after some time ? i only used 0.5M NaOH as electrolyte

@chemicum 7 лет назад

Carbon electrode should work long time without degrading - I just wash it with water and dry before assembling new cell.

@metazoxan2 9 лет назад

So what if I use copper, aluminum, and salt water (plus maybe some vinegar)? What would my voltage and current be from that?

@chemicum 8 лет назад

You would get 0.85 V and a few milliampers - the latter of course depend on the surface area. Aluminium batteries work better in alkaline solution.

@manishchakraborty6206 6 лет назад

Very easy electric acid

@musa1840 8 лет назад

Thank you very much for thw wonderful video! But I have a question, where did you find the "membrane"? Please help!!

@chemicum 8 лет назад

Take any paper

@musa1840 8 лет назад

+chemicum You mean offset paper or something like that? Perdon my ignorance I have been trying to figure it out for a few days!

@chemicum 8 лет назад

+Musa Aman office paper could work. We are using tissue paper/napkin.

@musa1840 8 лет назад

+chemicum Thank you very much! One more question where can I get the air cathode? Any porous thing will do?

@chemicum 8 лет назад

+Musa Aman porous carbon and some glue, see tic tac supercapacitor video

@ingussilins6330 5 лет назад

I use cooper and aluminium electrodes and salt water... before charging gives 0,5V, after charging - 1,4V ... add LED with "joule thief" circuit...

@chemicum 5 лет назад

After charging?

@ingussilins6330 5 лет назад

Jes , I charge it and NaCl converts to NaOH...

@chemicum 5 лет назад

it does. But Al2O3 won't go back to Al. Not in aqueous system. Porous carbon gives much higher current density than smooth Cu.

@ferminenriquezamorapineda2832 8 лет назад

Hello, I have made an air,aluminium battery but I used as electrolyte calcium hidroxide with calcium chloride, and It produced up to 2 volts in opened circuit, with the disadvantage that it gave less current though.

@chemicum 8 лет назад

Calcium hydroxide has low solubility and lower current density is understandable. But up to 2 V is a good achievement.

@ChemistryLab1 8 лет назад

While measuring amperes, i noticed that the cell is not exactly the same as the in the voltage measurement.There is a kind of wire coiled around the cell.Can you enlighten me as to what is that exactly(i will construct this cell for a university project, with your permission of course).

@ChemistryLab1 8 лет назад

+chemicum that was a fast response!!!Thank you very much, i will construct this cell next week in a university lab, and let you know of the results.Keep up the good work!!!!!

@NatureHacker 8 лет назад

what were your amps and volts result?

@solarhope 9 лет назад

Hi, Would this type of cell work with ionic liquid as electrolyte? If so, would the AL corrosion stop and the cell be rechargeable?

@chemicum 9 лет назад

It may work with EMIm AlCl4 ionic liquid. However, it is extremelt moisture sensitive and chlorine (or AlCl4) evolves at one electrode. This system has been claimed indeed being reversibly rechargeable, but it is not Al-air battery and has lower energy density.

@senpai3.088 8 лет назад

Was that mesh soaked on active carbon on it?

@chemicum 8 лет назад

Its just any metal mesh from the kitchen - pan oil catcher mesh, sieve mesh - can be iron, zinc-coated iron or stainless steel

@wckim15 9 лет назад

How did you build the air cathode?

@wckim15 9 лет назад

Is it possible to replace the iron mesh with copper wires and build without epoxy glue?

@wckim15 9 лет назад

K WC also, NaOH reacts with aluminium foil. Does the effervescence from this reaction reduce the effectiveness of the cell?

@chemicum 9 лет назад

K WC The air cathode was prepared from a mesh used in the kitchen to cover pan in order to catch oil splashes. It can be found in supermarkets. The mesh was coated with a thin epoxy layer and then active carbon dust was poured onto it. Then it was held under pressure until the epoxy was hardened.

@chemicum 9 лет назад

K WC You may try copper, but carbon should have a good contact with current collector. However, it also possible to build without glue, but then the case have to pressure the large carbon particles against current collector.

@chemicum 9 лет назад

K WC This type of battery only does not last very long. Commercial Al-air batteries use ultrapure Al to reduce corrosion, but it is very very expensive and not available household. Thus, use with maximum power density until to the end or take the Al out if you want to stop using it.