Fuel cell and production method therefor

Details Fuel cell and production method therefor Fuel cell and production method therefor

H - Electricity

01

M

H01M 4/96 (2006.01) H01M 4/86 (2006.01) H01M 4/88 (2006.01) H01M 4/90 (2006.01) H01M 8/10 (2006.01)

Patent

CA 2423341

A fuel cell in which optimum proton conductivity is maintained even in a dry atmosphere and in which the output is not lowered. The fuel cell includes a fuel electrode and an oxygen electrode arranged facing each other with a proton conductor film in-between. The fuel electrode and the oxygen electrode are formed of powders of a carbonaceous material as an electrode material. A proton conductor comprised of a carbonaceous material mainly composed of carbon and proton dissociative groups introduced into the carbonaceous material is present on the surfaces of the fuel and oxygen electrodes. For preparing the electrodes, the powder of a carbonaceous material as the electrode material are dipped in a solvent containing a proton conductor comprised of the carbonaceous material mainly composed of carbon and proton dissociative groups introduced into the carbonaceous material. The proton conductor comprised of the carbonaceous material (such as carbon clusters, e.g., fullerene or carbon nano-tubes) mainly composed of carbon and proton dissociative groups introduced into the carbonaceous material exhibits optimum proton conductivity without humidification.

La présente invention concerne une pile à combustible comportant une électrode à combustible et une électrode à oxygène disposées en vis-à-vis via une membrane à protons conductrice. L'électrode à combustible et l'électrode à oxygène utilisent une poudre de matériau carboné en tant que matériau d'électrode, et présentent à la surface de celui-ci un conducteur protonique ayant des radicaux dissociatifs de protons introduits dans le matériau carboné contenant du carbone à titre de constituant principal. On peut produire de telles électrodes par immersion d'une poudre de matériau carboné servant de matériau d'électrodes dans un solvant contenant un conducteur protonique ayant des radicaux dissociatifs de protons introduits dans un matériau carboné contenant du carbone à titre de constituant principal. Un conducteur protonique, ayant des radicaux dissociatifs de protons introduits dans un matériau carboné contenant du carbone à titre de constituant principal, par exemple un amas de carbone tel que le fullerène et un nanotube en carbone, présente une bonne conductivité protonique même sans humidification.

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