Electrode with chlorine gas provides high power and energy density

https://phys.org/news/2023-01-electrode-chlorine-gas-high-power.html

"lizard brings air bubble to breathe... 3 nm diameter porous carbon materials hold onto layer of chlorine gas (not air) when submerged in salt electrolyte... no chlorine gas escapes electrode... with charging, electrons reduce chlorine gas to chloride ions...  discharging oxidizes chloride ions back to chlorine gas in porous carbon... rapid reduction/oxidation and rapid mass transfer in thin layer gas increases energy density of supercapacitor while maintaining high power density even after thousands of cycles"