| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a solid polymer fuel cell system capable of preventing a solid polymer electrolyte membrane from drying by circulating water produced at an oxidant electrode in a cell even under conditions where the amount of water vapor in a reactant gas to be supplied is small, such as under operation without humidification, offering high performance and a compact size, and capable of reliably starting in a short time even under low-temperature conditions where the environmental temperature is 0°C or lower, without sacrificing battery performance, and the simplicity and compactness of the system. <P>SOLUTION: The solid polymer fuel cell system comprises a cell body having a cell stack, and the cell stack is obtained by stacking a plurality of unit cells having a solid polymer electrolyte membrane with an intervening separator and an intervening cooling plate in a selective manner. The separator has gas supply means for circulating reactant gas in two systems in opposite directions, a solid polymer electrolyte membrane having ionic conductivity and capable of separating gas is held between a pair of gas diffusion electrodes with intervening catalyst layers, and the catalyst layers are provided over the pair of gas diffusion electrodes except the downstream portions of the reactant gas channels. <P>COPYRIGHT: (C)2013,JPO&INPIT |
