An impedance analysis on properties of DMFC catalyst layers based on primary and secondary pores

Satoshi Tominaka*, Naohisa Akiyama, Toshiyuki Momma, Tetsuya Osaka

*この研究の対応する著者

研究成果: Article査読

21 被引用数 (Scopus)

抄録

An impedance analysis method for the catalyst layers of a direct methanol fuel cell is evaluated through demonstrating analyses and comparison of two types of the catalyst layers. The catalyst layers were prepared with different dispersing solvents: ethyleneglycol dimethyl ether or isopropyl alcohol aqueous solution. Methanol oxidation current of the catalyst layer prepared with the former solvent was more than twice that with the latter. The proposed method was revealed to have the potential for analyzing the difference clearly in terms of parameters, using our transmission-line equivalent circuit for the catalyst layers based on the assumption of primary and secondary pores. The parameters indicate that the main drawback of the catalyst layer prepared with the latter solvent is 85 times larger ionic resistance in the secondary pores. Moreover, precise analyses on the parameters indicate the microstructures of the catalyst layers, which correspond to a model reported previously. We conclude that this method is effective in analyzing the catalyst layer of the fuel cell.

本文言語English
ページ(範囲)B902-B909
ジャーナルJournal of the Electrochemical Society
154
9
DOI
出版ステータスPublished - 2007 8 6

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 再生可能エネルギー、持続可能性、環境
  • 表面、皮膜および薄膜
  • 電気化学
  • 材料化学

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