CATALYST LAYER FOR FUEL CELL

摘要

The purpose of the present invention is to provide a fuel cell capable of stably delivering higher output under conditions of low or no humidification. The present catalyst layer for a fuel cell contains: an innumerable number of catalysts (1) joined to a surface of an electrolyte layer and comprising catalytic metal particulate (1b) that is supported by a support (1a), the catalytic metal particulate (1b) comprising platinum and the support (1a) comprising carbon black; and a polyelctrolyte (2). Hydrophilic functional groups of the side-chain (101) of the polyelectrolyte (2) are oriented toward the catalyst (1) in a manner such that a hydrophilic layer (3) is formed on the catalyst (1). In addition, the catalyst layer for a fuel cell does not contain holes having a width that exceeds 1µm.