Table 1.

Various types of fuel cells based on electrolytes [6].

	Polymer Electrolyte Membrane Fuel Cell	Phosphoric Acid Fuel Cell	Alkaline Fuel Cell	Molten Carbonate Fuel Cell	Solid Oxide Fuel Cell
Electrolyte	Polymer membrane	Liquid H3PO4	OH−	CO32−	O2−
Operating Temp (°C)	80	200	60–220	650	600–1000
Catalyst	Pt	Pt	Pt	Ni	Ceramic
Cell component	Carbon base	Carbon base	Carbon base	Stainless base	Ceramic base
Fuel	H2, CH3OH	H2	H2	H2, CH4	H2, CH4, CO
Efficiency	50–70	55	60–70	55	55–60