Influence of anode diffusion layer properties on performance of direct borohydride fuel cell

Ki Tae Park, Un Ho Jung, Seong Uk Jeong, Sung Hyun Kim

Research output: Contribution to journalArticle

43 Citations (Scopus)

Abstract

This study investigates the effect of the anode diffusion layer on the cell performance and stability of a direct borohydride fuel cell (DBFC). Carbon paper with various PTFE contents and thicknesses is used as the anode diffusion layer. In the case of the DBFC, both hydrogen evolution and liquid fuel diffusion have to be considered while selecting an anode diffusion layer. Among the various PTFE-containing diffusion layers, the non-contained diffusion layer yields the best performance. Adding PTFE to the diffusion layer leads to improved gas transport but is unsuitable in the DBFC. In addition, the thinnest (100 μm) diffusion layer gives the best performance among the diffusion layers with various thicknesses. The decrease in the length of the diffusion path is beneficial for both the release of hydrogen gas and the diffusion of liquid fuel. In addition, it is found that the hydrogen evolution rate increases with increasing cell performance. Overall, adequate diffusion of liquid fuel is more important for the performance of a DBFC than the release of hydrogen gas.

Original languageEnglish
Pages (from-to)192-197
Number of pages6
JournalJournal of Power Sources
Volume162
Issue number1
DOIs
Publication statusPublished - 2006 Nov 8

Keywords

  • Anode diffusion layer
  • Diffusion layer thickness
  • Direct borohydride fuel cell
  • Hydrogen evolution
  • PTFE contents

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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