Effects of a microporous layer on the performance degradation of proton exchange membrane fuel cells through repetitive freezing

Yongtaek Lee, Bosung Kim, Yongchan Kim, Xianguo Li

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

The gas diffusion layer (GDL) covered with a microporous layer (MPL) is being widely used in proton exchange membrane fuel cells (PEMFCs). However, the effect of MPL on water transport is not so clear as yet; hence, many studies are still being carried out. In this study, the effect of MPL on the performance degradation of PEMFCs is investigated in repetitive freezing conditions. Two kinds of GDL differentiated by the existence of MPL are used in this experiment. Damage on the catalyst layer due to freezing takes place earlier when GDL with MPL is used. More water in the membrane and catalyst layer captured by MPL causes permanent damage on the catalyst layer faster. More detailed information about the degradation is obtained by electrochemical impedance spectroscopy (EIS). From the point of view that MPL reduces the ohmic resistance, it is effective until 40 freezing cycles, but has no more effect thereafter. On the other hand, from the point of view that MPL enhances mass transport, it delays the increase in the mass transport resistance.

Original languageEnglish
Pages (from-to)1940-1947
Number of pages8
JournalJournal of Power Sources
Volume196
Issue number4
DOIs
Publication statusPublished - 2011 Feb 15

Keywords

  • Degradation
  • Electrochemical impedance spectroscopy
  • Freezing
  • Gas diffusion layer
  • Microporous layer
  • Proton exchange membrane fuel cell

ASJC Scopus subject areas

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

Fingerprint Dive into the research topics of 'Effects of a microporous layer on the performance degradation of proton exchange membrane fuel cells through repetitive freezing'. Together they form a unique fingerprint.

  • Cite this