A123Systems developed a 2 MW for 15min Trailer LiFePh4, in 2008 -09. the American refered to Great American IDeas with little finccial stability===A123
pumped storage or hydrogen would be better. one company plans on storeing energy by lifting a large mass to a higher elevation. so with mass or hydrogen the is no life expectency
You probably got that wrong. Lithium has the highest energy density, which is easy to understand when looking at the periodic table. Also, this battery works just fine after 4000+ cycles.
+Farooq Ishaq According to the internet ZnBr chemistry has around 2000 cycles lifetime, that isn't superior to Lithium ion chemistries tuned for longevity (provided they get temperature management, as they did). The chemistry with the longest longevity, besides those that are being developed, is nickel iron which can last for half a century, if not more. Besides that there are supercapacitors, though they have very high cost and besides the cutting edge ones using graphene, they also have very low energy density. After that there are exeperimental ones like Ambri with claimed longevity of 300 years. I'm sure there are plenty others though these are among the most important.
kalimul Ambri is past experimental and should be called something like developmental. Their lower temp batteries are experimental, but not likely to be used for grid storage.
