Dramatic reduction of water crossover in direct methanol fuel cells by cathode humidification

Fuqiang Liu, Chao Yang Wang

Research output: Contribution to journalArticle

10 Scopus citations

Abstract

As a key parameter in enabling the operation of high concentration methanol fuel cells, the water transport coefficient through the membrane must be reduced to between 0 and -1/6. We show that this coefficient can be lowered to -0.7 at 60°C and under common cathode flow conditions using fully humidified air. A previously developed membrane electrode assembly based on a Nafion 112 membrane was used. The present result gives rise to the possibility of achieving a water-neutral state for use of pure methanol, i.e., with the water crossover coefficient of -1/6, under temperatures much higher than 60°C and in active air-flowing direct methanol fuel cell systems with high power density.

Original languageEnglish (US)
Pages (from-to)B101-B102
JournalElectrochemical and Solid-State Letters
Volume12
Issue number6
DOIs
StatePublished - Apr 20 2009

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Materials Science(all)
  • Physical and Theoretical Chemistry
  • Electrochemistry
  • Electrical and Electronic Engineering

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