Impact of water flow rate on current efficiency in solid polymer water electrolyzer under 2 MPa condition

Kohei Ito, Y. Maeda, T. Sakaguchi, A. Inada, Hironori Nakajima

研究成果: Chapter in Book/Report/Conference proceedingConference contribution

抄録

When solid polymer water electrolyzer (SPWE) is operated under high pressure conditions, large pressure difference forms between anode and cathode. It causes crossover of produced gas, especially for hydrogen gas, and decreases current efficiency of SPWE. Supplying water into cathode channel, in addition to anode, is a countermeasure to suppress the crossover, because the water flow improves to drain the hydrogen gas outside of cell, resulting in a decrease of the crossover and increase of the efficiency. This countermeasure for the crossover is evaluated by a SPWE operation under 2 MPa condition with visualization of hydrogen bubbles in cathode channel. The evaluation revealed that supplying water into cathode channel increases the efficiency by several percent under 0.33 A/cm2. Enhanced detachment of hydrogen bubbles from the surface of current supplier was confirmed by the visualization. It is suggested that this enhancement increases the efficiency.

本文言語英語
ホスト出版物のタイトルPolymer Electrolyte Fuel Cells 14
編集者K. Shinohara, S. R. Narayanan, K. Swider-Lyons, A. Weber, C. Coutanceau, R. Mantz, H. A. Gasteiger, D. Jones, M. Edmundson, S. Mitsushima, V. Ramani, Y. Meas, T. Fuller, H. Uchida, F. N. Buchi, K. A. Perry, T. J. Schmidt, J. M. Fenton, P. Strasser
出版社Electrochemical Society Inc.
ページ1019-1028
ページ数10
3
ISBN(電子版)9781607685395
DOI
出版ステータス出版済み - 1 1 2014
イベント14th Polymer Electrolyte Fuel Cell Symposium, PEFC 2014 - 226th ECS Meeting - Cancun, メキシコ
継続期間: 10 5 201410 9 2014

出版物シリーズ

名前ECS Transactions
番号3
64
ISSN(印刷版)1938-5862
ISSN(電子版)1938-6737

その他

その他14th Polymer Electrolyte Fuel Cell Symposium, PEFC 2014 - 226th ECS Meeting
Countryメキシコ
CityCancun
Period10/5/1410/9/14

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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