New conceptual gas distributor with mass transfer enhancing function in polymer electrolyte fuel cells

P. W. Li, S. P. Chen, M. K. Chyu

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

1 Scopus citations

Abstract

A new conceptual structure of the gas distributors in polymer electrolyte fuel cells (PEFC) or proton exchange membrane (PEM) fuel cells is developed in this work. Basically, instead of partitioned channels and non-interrupted walls, the proposed new gas distributors make use of discretized elements as the current collector in the flow fields, which can help to enhance the mass transfer in the gas flow fields while maintaining the function of transmitting current out of the fuel cell. Experimental operation without external humidification of the reactant gases for single PEM fuel cells and cell stacks using conventional and the currently presented gas distributors were conducted for comparison and verification. It was found that the maximum operational cell current, beyond which there is a sharp drop of the cell voltage, could be significantly improved when using the currently proposed gas distributors and the same membrane-electrode-assembly (MEA) sheets. Correspondingly, the output electrical power can have at least 11 percent increment for the operation with free-convective airflow and around 50 percent increment for the operation with forced convective airflow.

Original languageEnglish (US)
Title of host publicationFuel Cell Science, Engineering and Technology - 2004
EditorsR.K. Shah, S.G. Kandlikar
Pages561-565
Number of pages5
StatePublished - Sep 13 2004
Externally publishedYes
EventSecond International Conference on Fuel Cell Science, Engineering and Technology - Rochester, NY, United States
Duration: Jun 14 2004Jun 16 2004

Publication series

NameFuel Cell Science, Engineering and Technology - 2004

Other

OtherSecond International Conference on Fuel Cell Science, Engineering and Technology
CountryUnited States
CityRochester, NY
Period6/14/046/16/04

ASJC Scopus subject areas

  • Engineering(all)

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