The C.G.E. circulating zinc/air battery: A practical vehicle power source

The currently proposed electric vehicle power sources are briefly summarized, and compared with the circulating zinc/air system. Based on current laboratory test data, this system should be capable of 110 Wh/kg, 80 W/kg in a 1 tonne urban vehicle and up to 125 Wh/kg in heavy duty applications, with lifetimes up to twice those for lead—acid systems. Despite its comparatively low recharge efficiency (40%) it will be capable of overall per km costs comparable to those for gasoline powered vehicles at current U.S.A. or untaxed European gasoline prices.