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

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

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.

Original languageEnglish
Title of host publicationPolymer Electrolyte Fuel Cells 14
EditorsK. 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
PublisherElectrochemical Society Inc.
Pages1019-1028
Number of pages10
Edition3
ISBN (Electronic)9781607685395
DOIs
Publication statusPublished - Jan 1 2014
Event14th Polymer Electrolyte Fuel Cell Symposium, PEFC 2014 - 226th ECS Meeting - Cancun, Mexico
Duration: Oct 5 2014Oct 9 2014

Publication series

NameECS Transactions
Number3
Volume64
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

Other

Other14th Polymer Electrolyte Fuel Cell Symposium, PEFC 2014 - 226th ECS Meeting
CountryMexico
CityCancun
Period10/5/1410/9/14

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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