I wonder what the problems with sodium and potassium are. Sodium, for one, is an extremely common element on Earth's surface, which I can't say for Lithium. P

I wonder what the problems with sodium and potassium are. Sodium, for one, is an extremely common element on Earth's surface, which I can't say for Lithium. Potassium is also very common. You can get all the sodium you could possibly want just by drying out seawater. By contrast, lithium supply seems to be limited to a few places such as Bolivia.