>>12096654A good battery depends a bit on what you want, for turbomachine batteries (and the kind you'd use in battery aircraft) you need to put out a lot of power quickly, for EV car batteries you need moderately high power output but also significant endurance, and for stuff like phone and computer batteries you need relatively low power output but preferably long endurance to maximize up time.
Of course, the "ideal" battery will have both very high power density and very high energy density per mass, IE smaller batteries with larger capacities and higher power outputs. Solid electrolyte and glass electrolyte batteries are moving in that direction, both have higher charge/discharge rates than liquid electrolyte cells, both have higher capacities, and both have longer overall lifespans. They're also more durable inherently, less prone to or completely immune to certain failure states, and cheaper to manufacture at the large scale.
The batteries in most cars are old lead/acid batteries, primarily used because they are cheap and easy to mass manufacture, their energy density and power density is pretty shit, their discharge efficiency can be pretty bad, and their lifespan can be as low as 300 full cycles. Tesla batteries by comparison have higher specific energy, higher energy density, higher power density, roughly comparable discharge efficiency, and a lifespan of up to 2000 cycles.
>>12096666There are several companies actively working on different types of solid-electrolyte batteries right now and a smaller company in Canada signed a deal with Braga and Goodenough to commercialize their cell sometime in I believe 2021, we might see an operational unit as soon as next year. I'd imagine the primary hurdle has been developing the mass production process, since it seems like a lot of better battery chemistry is already understood. Production lines are expensive and time consuming to set up.
