研究論文
固体高分子形燃料電池用プロトン交換膜のプロトンイオン伝導度測定
2002 年 27 巻 1 号 p. 29-34
詳細
2002 年 27 巻 1 号 p. 29-34
The conductivity of a polymer electrolyte membrane is one of the most important factors, which govern the performance of polymer electrolyte fuel cell. In this study, we proposed a new measuring method of conductivity by direct current with perpendicular direction to the surface of membrane, which imitated the operation conditions of an actual cell. The
conductivity of Nafion®117 by using the new method was 0.085 S cm-1, which was in good agreement with official announcement value of 0.083 S cm-1. This shows that the new method proposed in the present paper is valid. Using the new method, it was found that the conductivity increased with increasing the ion exchange capacity, and the activation energy of proton conduction was obtained as about 10~15 kJ mol-1.
