This has been in the news since 2014....

This has been in the news since 2014.
https://newatlas.com/proton-flow-battery-hydrogen-electricity-rmit/30818/

I would be interested in how this compares with such things as recharging rates. How fast can one of these cells store protons from a water flow compared with direct charging from an existing electric current?
Reliance on moving parts (water flow) to charge is a little bit of a nuisance but could possibly be useful in applications like Snowy Hydro 2.0
I guess it could work in a vehicle application if it were small enough, could recharge quickly enough and discharge enough for sufficient periods of time while being compatible with fuel distribution. It is far cheaper and quicker to develop electrical charge distribution than water actually. unless it is only able to be recharged at home and then you would need that extra density just to get over distance anxiety.

Will check on this again in another four years, I think.