classification of fuel cells - school of engineeringjmfent/classification of fuel cells.pdf · cheg...
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CHEG 295/320 (Fuel Cell Engineering, Fall 2004)
(C) Vijay Ramani and J. M. Fenton (2004)
Classification of Fuel Cells
Images in Slides 3-6 reproduced from:
http://fuelcells.si.edu/ : The Smithsonian Institute
CHEG 295/320 (Fuel Cell Engineering, Fall 2004)
(C) Vijay Ramani and J. M. Fenton (2004)
1000° CYttria Stabilized ZirconiaSolid Oxide
650° CLithium / Potassium Carbonate
Molten Carbonate
160 – 200° CPhosphoric AcidPhosphoric Acid
70-120° CPotassium HydroxideAlkaline
60-80° CPolymer membranePolymer Electrolyte
Operating TemperatureElectrolyte UsedFuel Cell Type
CHEG 295/320 (Fuel Cell Engineering, Fall 2004)
(C) Vijay Ramani and J. M. Fenton (2004)
2H2 = 4H+ + 4e
Pt electrodes usedPt electrodes used
HH33POPO44 or Acidic polymer electrolyteor Acidic polymer electrolyte O2 + 4H+ + 4e = 2H2O
CHEG 295/320 (Fuel Cell Engineering, Fall 2004)
(C) Vijay Ramani and J. M. Fenton (2004)
2H2 + 4OH- = 4H2O + 4e Ni, Au, Ag based Ni, Au, Ag based electrodeselectrodes
O2 + 2H2O + 4e = 4 OH-80 80 –– 85% KOH electrolyte85% KOH electrolyte
CHEG 295/320 (Fuel Cell Engineering, Fall 2004)
(C) Vijay Ramani and J. M. Fenton (2004)
LithiatedLithiated Nickel oxide Cathode; Nickel oxide Cathode;
Nickel + Chromium (10%) anodeNickel + Chromium (10%) anode
Li, Na and K Carbonate based Li, Na and K Carbonate based electrolyte (50 wt%) electrolyte (50 wt%) –– molten statemolten state
H2 + CO32- = H2O + CO2 + 2e
0.5 O2 + CO2 + 2e = CO32-
CHEG 295/320 (Fuel Cell Engineering, Fall 2004)
(C) Vijay Ramani and J. M. Fenton (2004)
H2 + O2- = H2O + 2e
YttriaYttria Stabilized Zirconia Stabilized Zirconia ElectrolyteElectrolyte
Strontium doped Lanthanum Strontium doped Lanthanum ManganiteManganite as Cathodeas Cathode
Nickel Zirconia as anodeNickel Zirconia as anode
0.5O2 + 2e = O2-
CHEG 295/320 (Fuel Cell Engineering, Fall 2004)
(C) Vijay Ramani and J. M. Fenton (2004)
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