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Potassium is much more abundant than lithium so it should take less energy to concentrate it to pure form vs more dilute lithium. Never ever forget that pocket supercomputer you are using to post things cannot exist without the brilliance of UT Austin and their lithium ion battery. No other power cell tech had the density to make such a device possible before lithium ion was invented. Nicad no even in the same league ,same for nickel metal hydride. Lead acid please come to the 21st century. This KIB is neck and neck with LFP cells in production that alone means they will be commercialized for power tools, personal electronics and medical devices any EV us is just along for the ride. The market for the first three uses dwarfs the EV market. The next gen of cells is already in the works solid state with double valent Ca and Mg ions then right behind them are solid Al+3 cells with triple the electrons of lithium that by physics alone triples the capacity per ion. Anything a lithium cell does with a given cathode aluminum does three times more atom for atom. Aluminum is also the third most abundant element after Silicon and Oxygen. Aluminium graphene cells have proven to charge at 66C read that again 66C is full charged in under a minute. Obviously you cannot push 6 megawatts over a minute to charge a 100kwh pack in a single min. You can push enough to charge a phone battery or a power tool in a minutes time that’s where crazy high C rates matter. EVs need 10C for a 6 min charge that equals a petrol stop.

I have owned a number of vehicles that didn’t have 300+ mile ranges on a full tank of petrol. Both of my Ford explorers didn’t, the K5 blazer nope barely 220 on a full tank. Rx7 had just over 225 range. My Jaguar with dual tanks ten gal each would go maybe 300 city if I was nice to it a s didn’t open up the V12 then it drank petrol like a drunk sailor. Only having 200 ish miles didn’t matter when you could put 20 gal in 5 or 6 min at a pump. Once 10C LFP or Algr or Naion cells become common range as an issue disappears for City and suburban types. In the City you are always within a few miles of a HVDC point. I’m in Addison Texas today there are 30 spots in 3 miles radius for my Model 3 open right now all of them 100kw or above. Range anxiety is a boomer issue I trust the tech to take me home or to a HVDC point along the way. I have taken my 3 as far as terlingua way out in West Texas for chili fest last November and as far East as Orlando FL never once had a issue finding a supercharger or a CCS 50+kw on someone else’s network. Even on the way to Terlingua there was a supercharger in Alpine Texas well within the radius to get from there and back. Use ARCGIS drop a 150 mile radius around every supercharger the areas not covered are where a Model 3 LR can get out and back with 50 miles in reserve. Hint virtually no where in Texas is not covered by a radius. Look for yourself.

https://chargefinder.com/us/search

Zoom into far west Texas then drop 150 mile circles. The only place not covered is by the Mexican border del Rio area. You could find L2 charges I limited it to fast DC only.