“…The secondary batteries and regenerative fuel cells that have been considered for the load leveling/peak-shaving applications are the sodium-sulfur battery (35), the lithium-metal sulfide battery (36), the zinc-chlorine battery (37), the zinc-bromine battery (38)(39)(40)(41), the hydrogen-chlorine cell (42)(43)(44)(45)(46)(47)(48)(49), the hydrogen-bromine cell (50), the iron-chromine redox cell (51,52), the iron-ferric redox cell (53,54), and the zinc-ferrocyanide redox cell (55). The Nafion membrane has been used as a separator in both the hydrogen-halogen cell (45,50) and in the zinc-bromine cell (38) because Nafion is a highly stable perfluorinated material which is not affected by strong acids and halogen.…”