| 摘要 |
PROBLEM TO BE SOLVED: To provide a solid high polymer fuel cell of a relatively low resistance at low cost in which danger of short-circuitting with an opposite electrode is eliminated, and which will not be broken by pressure applied. SOLUTION: A collector includes carbon fiber paper comprising carbon short fibers oriented in random directions in a substantially two-dimensional plane and bound with high polymer substance, where length of the carbon short fibers is at least 3mm, and at least five times the thickness of the carbon fiber paper. To the collector, uniform surface pressure of 2.9MPa is applied for two minutes in the thickness direction, and its weight reduction ratio after release of the surface pressure is set to be 3% or less. A diameter D(μm), tensile strength σ(MPa), and tensile elasticity E(MPa) of the carbon short fibers included in the collector are set to satisfy a relation of σ/(E×D)>=0.5×10<-3> . |
