Dependence of the Cell Resistance on External Potential in DMFC System
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- 及川, 典子
- Max Planck Institute for Dynamics and Self-Organization
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- Abella, Lorene L.
- Mitsubishi Industries, LTD.
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- 深田, 智
- Faculty of Engineering Sciences, Department of Energy Engineering Science, Kyushu University
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- 松元, 達也
- Department of Applied Quantum Physics and Nuclear Engineering, Kyushu University
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- 福田, 研二
- Department of Applied Quantum Physics and Nuclear Engineering, Kyushu University
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抄録
The polarization properties of a portable direct methanol fuel cell (DMFC) subjected to an external potential are experimentally investigated. In DMFC, polymer electrolyte membrane plays important role as a proton conductor. The resistance of the membrane, which reflects ion-transport and mobility of ions through the membrane, is one of the fundamental factors that determine electric activity of the fuel cell. We applied an external potential in the reverse and forward direction to the cell potential of the DMFC system. From the dependencies of the effective membrane resistance on the external potential, it was found that there are several thresholds in the external potential at which the main reactions of the cell are switched. In the case of the reverse external potential, electrolysis of water and methanol induced by the accumulated electrons and protons reduce the cell resistance. For the forward external potential, on the other hand, the resistance becomes high due to the polarization inside the membrane. The resistance decreases as electric decomposition of water and methanol proceeds.
収録刊行物
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- 九州大学工学紀要
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九州大学工学紀要 71 (3), 67-76, 2011-09
九州大学大学院工学研究院
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詳細情報 詳細情報について
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- CRID
- 1050298532704893312
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- NII論文ID
- 120003678717
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- NII書誌ID
- AA11481788
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- HANDLE
- 2324/20456
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- 本文言語コード
- en
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- 資料種別
- departmental bulletin paper
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- データソース種別
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- IRDB
- CiNii Articles
