There are some >20Wh/kg chemistries listed @ [0]. Zinc-bromine apparently is 60-85Wh/kg... [0] https://en.wikipedia.org/wiki/Flow_battery#Chemistries https://

There are some >20Wh/kg chemistries listed @ [0]. Zinc-bromine apparently is 60-85Wh/kg... [0] https://en.wikipedia.org/wiki/Flow_battery#Chemistries https://en.wikipedia.org/wiki/Flow_battery#Chemistries