Table 2.

Typical characteristics of various fuel cell systems. Reproduced with permission from [30,110].

Fuel Cells	Anode Feed	Cathode Feed	Working Temp. (°C)	Power Density (mW/cm2)	Fuel Efficiency
Alkaline fuel cell	Pure H2	O2 or air	90–100	100–200	60
PEMFCs	Pure H2	O2 or air	50–100	350	60
Phosphoric acid fuel cell	Pure H2	O2 or air	150–200	200	40
Molten carbonate fuel cell	H2 or natural gas	O2 or air	600–700	100	45–50
Solid oxide fuel cell	Gasoline or natural gas	O2 or air	700–1000	240	60