| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fuel cell capable of reducing both oxygen transport resistance and electronic resistance. <P>SOLUTION: A fuel cell includes: a membrane electrode assembly; a pair of gas diffusion layers holding the membrane electrode assembly; and a separator holding the membrane electrode assembly and the pair of gas diffusion layers and having a rib forming a channel serving as a gas passage on a face opposing the gas diffusion layers. The occupied area ratio S<SB POS="POST">C</SB>(-) of the channel on the face opposing the gas diffusion layers and the thickness t (μm) of the gas diffusion layers satisfy the relationship represented in the following formula (1). 0.9>S<SB POS="POST">C</SB>≥55 (t-103)<SP POS="POST">2</SP>/1,000,000+0.3...(1) <P>COPYRIGHT: (C)2013,JPO&INPIT |
