Fuel Cell - web.yonsei.ac.kr

1 Fuel Cell Research CenterFuel CellFuel CellLab. of energy Conversion & Storage MaterialsLab. of energy Conversion & Storage MaterialsProduced by B. H. Produced by B. H. Produced by B. H. Produced by B. H. RyuRyuRyuRyuEdited by S. B. MaEdited by S. B. MaEdited by S. B. MaEdited by S. B. MaDirected by K. B. KimDirected by K. B. KimDirected by K. B. KimDirected by K. B. KimLab. of energy Conversion & Storage Materials Lab. of energy Conversion & Storage Materials ? = Fuel cell Lab.

2 Of energy Conversion & Storage Materials ? & Lab. of energy Conversion & Storage Materials Low temperature Fuel Cells (LTFC) Alkaline Fuel Cell (AFC) Proton Exchange Membrane Fuel Cell (PEMFC) Direct Methanol Fuel Cell (DMFC) Medium and High Temperature Fuel Cells [MHFC] Phosphoric Acid Fuel Cell (PAFC) Molten Carbonate Fuel Cell (MCFC) Solid Oxide Fuel Cell (SOFC) [~] Fuel Cell.

3 Lab. of energy Conversion & Storage Materials 2H2+ O22H2O2H2O 2H2+ O2 Lab. of energy Conversion & Storage Materials OHHHHOOHHOHHC hemical energyStage of reactionPotential energy 2H2+ O22H2 OLab. of energy Conversion & Storage Materials (LTFC)HHH+H+OO2-eeO2-H+H+OOHHHH eeeeH+H+H+H+O2-H+H+O2-H+H+OHHHHO eeeeH+H+H+H+ H+ e- 3 / / Lab. of energy Conversion & Storage Materials (LTFC) Anode Anode Anode Anode CathodeCathodeCathodeCathodeElectricalCi rcuitH+e Lab.

4 Of energy Conversion & Storage Materials : ElectrolyteH+H2O2 e = site Lab. of energy Conversion & Storage Materials : O2+ 4e-+ 4H+ 2H2 OElectrolyte2H2 4H++ 4e-H2O2O2+ 2CO2+ 4e- 2CO32-Electrolyte2H2+2CO32- 2H2O+2CO2+4e-H2O2CO2H+CO32-O2+ 4e- 2O2-Electrolyte2H2+2O2- 2H2O+4e-H2O2O2- ( 80 oC) ( 650 oC) ( 800 oC)H+e O2H2 Lab. of energy Conversion & Storage Materials : & / Electrolyte End Plate (i)Lab.

5 Of energy Conversion & Storage Materials : Lab. of energy Conversion & Storage Materials : 7 kW 100-cell PEMFCLab. of energy Conversion & Storage Materials : MCFCLab. of energy Conversion & Storage Materials : I-V Loader0400800 1200 1600 Cell voltage / VCurrent density / mA cm-2 0400800 1200 1600 20000100200300400500600700 Power density / mW cm-2 Current density / mA cm-2P = VI End Plate Lab.

6 Of energy Conversion & Storage Materials : Current Interrupt / : O2+ 4e-+ 4H+2H2 OOhmic dAC =VTimeTime of current interruptImmediate rise in voltage, VrSlow final rise to OCV, VaLab. of energy Conversion & Storage Materials : Current InterruptVTimeVrVaVTimeNegligible VrVaVTimeVrVa 80 oC, / 80 oC, / 700 oC, / Lab. of energy Conversion & Storage Materials : ImpedancePotentiostat FRAVTimeOhmic Lab.

7 Of energy Conversion & Storage Materials MCFC, SOFCPEMFCDMFC