Direct alcohol fuel cells using solid acid electrolytes

H - Electricity – 01 – M

Patent

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H01M 8/10 (2006.01)

Patent

CA 2559028

Direct alcohol fuel cells using solid acid electrolytes and internal reforming catalysts are disclosed. The fuel cell generally comprises an anode, a cathode, a solid acid electrolyte and an internal reforming catalyst. The internal reforming catalyst may comprise any suitable reformer and is positioned adjacent the anode. In this configuration the heat generated by the exothermic fuel cell catalyst reactions and ohmic heating of the fuel cell electrolyte drives the endothermic fuel reforming reaction, reforming the alcohol fuel into hydrogen. Any alcohol fuel may be used, e.g. methanol or ethanol. The fuel cells according to this invention show increased power density and cell voltage relative to direct alcohol fuel cells not using an internal reformer.

La présente invention concerne des piles à combustible à alcool direct utilisant des électrolytes acides solides et des catalyseurs de reformage internes. La pile à combustible comprend généralement une anode, une cathode, un électrolyte acide solide, et un catalyseur de reformage interne. Ce catalyseur de reformage interne, qui admet n'importe quel reformeur approprié, est disposé contre l'anode. Dans cette configuration, la chaleur dégagée par les réactions exothermiques du catalyseur de la pile à combustible et le chauffage ohmique de l'électrolyte de la pile à combustible alimente la réaction de reformage endothermique du combustible, donnant de l'hydrogène par reformage de l'alcool combustible. On peut utiliser n'importe quel type d'alcool comme combustible, et notamment le méthanol et l'éthanol. Les piles à combustible de l'invention font preuve d'une densité de puissance accrue, et d'une tension de pile accrue par rapport aux piles à combustible à l'alcool direct n'utilisant pas de reformeur interne.

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