“Operating at a nominal voltage of 3.7V, the KIB is on track to achieve a gravimetric energy density of 160-180 Wh/kg,”
Non-production cells have been developed with a capacity of 235 Wh/kg.
Yes. I don’t think that Potassium will replace lithium ion in terms of it’s energy density. It might make sense in some things, like rechargeable batteries or ebike batteries, where you will plug it in anyway.
For example, when I ride my bike to work, I usually plug it in at work. I could charge my bike every two days, but I don’t do that. I think most people with e-bikes charge their bikes after every use, so maybe I don’t need a bike that can go 100km between charges.