I was thinking of https://en.wikipedia.org/wiki/Capacitive_deionization https://en.wikipedia.org/wiki/Capacitive_deionization I was wrong about the desorption

I was thinking of https://en.wikipedia.org/wiki/Capacitive_deionization https://en.wikipedia.org/wiki/Capacitive_deionization I was wrong about the desorption step, I thought they scraped the ions off... Incidentally at that page: "Part of the energy input required during the adsorption phase can be recovered during this desorption step. " With enough of those electrodes, can't we use the sea as a big electrolyte battery? the energy is storedd capacitively