Effect of water management in membrane and cathode catalyst layers on suppressing the performance hysteresis phenomenon in anion-exchange membrane fuel cells

Kanji Otsuji, Yuto Shirase, Takayuki Asakawa, Naoki Yokota, Katsuya Nagase, Weilin Xu, Ping Song, Shuanjin Wang, Donald A. Tryk, Katsuyoshi Kakinuma, Junji Inukai, Kenji Miyatake, Makoto Uchida*

*この研究の対応する著者

研究成果: Article査読

1 被引用数 (Scopus)

抄録

Anion exchange membrane fuel cells (AEMFCs) are vulnerable to water management problems, since water is produced at the anode and consumed at the cathode. Previously we found severe voltage losses when increasing the current density in an AEMFC with a commercial Fe–N–C cathode catalyst. In the present work, we have clearly identified the problem as being related to water management and developed two approaches to alleviating the problem: by use of a thin hydrophilized membrane, the diffusivity of water at the surface was improved, and the severe I–V hysteresis was suppressed, despite the cell using an Fe–N–C cathode catalyst with a high water absorption rate. The voltage loss was also alleviated by the use of a recently developed Fe–N–C catalyst with higher hydrophobicity, which decreased the absorption of back-diffusing water into the catalyst layer and increased the amount of water supplied to the reaction sites These improvements have demonstrated that water transport is the main limitation for the previously reported hysteresis and provide strategies to achieve higher performance AEMFCs through proper water management and formation of water transport pathways.

本文言語English
論文番号230997
ジャーナルJournal of Power Sources
522
DOI
出版ステータスPublished - 2022 2月 28

ASJC Scopus subject areas

  • 再生可能エネルギー、持続可能性、環境
  • エネルギー工学および電力技術
  • 物理化学および理論化学
  • 電子工学および電気工学

フィンガープリント

「Effect of water management in membrane and cathode catalyst layers on suppressing the performance hysteresis phenomenon in anion-exchange membrane fuel cells」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル