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I doubt that you can make batteries with a higher engergy density, otherwise they are quite explosive. How do you make them much lighter? Lithium is a pretty l

by foxes 8y ago

I doubt that you can make batteries with a higher engergy density, otherwise they are quite explosive. How do you make them much lighter? Lithium is a pretty light material. Petrol is so energy dense because you are storing that energy in chemical bonds. Electrical energy is not as "dense". I think we are close to "optimal" batteries.

netjiro 8y ago
E.g. you change the other part of the battery. "Air breathing" LiO batteries could reach energy densities in the ballpark of other chemical fuels. I think lab demo cells are around 5MJ/kg nowadays. Traditional chemical fuels have high energy density because we don't include the oxidizer, since it's readily available in the air. Any time you stuff a lot of potential energy into a small space with a low threshold for release you're making something dangerous...