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Lithium air batteries theoretically can reach 10000-12000w/kg though they have only reached 1200w in labs so far. Gasoline is 13000w/kg. We don't need to match
by xbmcuser 2mo ago
Lithium air batteries theoretically can reach 10000-12000w/kg though they have only reached 1200w in labs so far. Gasoline is 13000w/kg. We don't need to match gasoline as it is inefficient.
CATL just got it's 500w/kg batteries for commercial aviation approved I am betting China is going to do the same with electric planes that it did with cars. They can't build a efficient enough jet engine to be competitive yet but they already can build the narrow body planes replace the jet engine with electric take over the market for short haul aviation once the battery densities cross 1000w/hr.
- skew-aberration 2mo agoWhere does 12kw/kg come from? A specific type of battery? That sounds like the energy density for lithium alone. There may be architectures like flow batteries which could get close for some chemistries, but a standard battery (intercalation of ions) cannot get remotely close, even in theory.
- xbmcuser 2mo agoThis was claimed by CATL chief battery scientist recently or at least that's what the press claimed could be mistranslation from Chinese to English.
- skew-aberration 2mo agoAs far as I could glean from the internet, it's a theoretical limit for lithium, rather than for a lithium-air battery. Any future device that gets close to that limit won't be a battery as we know it.
- xbmcuser 2mo agookay but anyway for electric commercial aviation 1000-1200w/kg would be enough to replace 70-80% of all flights.