Electron transport in gas diffusion layer of polymer electrolyte fuel cells

Hua Meng, Chao-yang Wang

Research output: Contribution to journalConference article

Abstract

A three-dimensional, single-phase, isothermal numerical model of polymer electrolyte fuel cell (PEFC) is employed to investigate effects of lateral electron transport in gas diffusion layer (GDL) for the first time. An additional electron transport equation is solved in the catalyst and gas diffusion layers, and in the current collector. It is found that the lateral electronic resistance plays a critical role in determining the current distribution and cell performance. With reduced GDL thickness, the effect of the lateral electronic resistance becomes even stronger, because the cross-sectional area of GDL for lateral electron transport is smaller. Inclusion of GDL electron transport enables the thickness of GDL and widths of the gas channel and current collecting land to be optimized for better current distribution and cell performance. In addition, the present model enables: (1) direct incorporation of contact resistances emerging from GDL/catalyzed membrane and GDL/land interfaces in the solution process, (2) natural implementation of the total current as the more useful boundary condition than the cell voltage, and (3) stack modeling with cells connected in series and hence having the identical total current.

Original languageEnglish (US)
Pages (from-to)447-455
Number of pages9
JournalAmerican Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD
Volume374
Issue number2
DOIs
StatePublished - Jan 1 2003
Event2003 ASME International Mechanical Engineering Congress - Washington, DC., United States
Duration: Nov 15 2003Nov 21 2003

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

Fingerprint Dive into the research topics of 'Electron transport in gas diffusion layer of polymer electrolyte fuel cells'. Together they form a unique fingerprint.

  • Cite this