Oxygen is supplied to the cathode, and within the cell, the fine coal powder undergoes electrochemical oxidation across an oxide membrane, yielding electricity directly – without any intermediate steam cycle or mechanical turbine.

What the fuck, it’s not boiling water this time

Whenever a new one of these pops up I look up what other smarter people think, and usually the limiting factor of these kind of “batteries” is making the membrane that separates the anion and cathode cheaply and reliably enough.