High-power direct ethylene glycol fuel cell (DEGFC) based on nanoporous proton-conducting membrane (NP-PCM)

E. Peled, V. Livshits, T. Duvdevani

Research output: Contribution to journalConference articlepeer-review

Abstract

We recently reported the development of a new nanoporous proton-conducting membrane (NP-PCM) and have applied it in a direct methanol fuel cell (DMFC) and in other direct oxidation fuel cells. The use of the NP-PCM in the DMFC offers several advantages over the Nafion-based DMFC including lower membrane cost, lower methanol crossover which leads to a much higher fuel utilization and higher conductivity. In this work, we found that the 90 °C swelling of the NP-PCM is only 5-8% and that the diffusion constant of methanol at 80-130 °C is higher by a factor of 1.5-3 than that of ethylene glycol (EG). The maximum power density of methanol/oxygen and EG/oxygen FCs equipped with a 100μm thick NP-PCMs is 400 and 300 mW/cm2 respectively, higher than that for a DMFC based on Nafion 115 (260 mW/cm2 [Eletrochem. Solid-State Lett. 4 (4) (2001) A31]. This puts the DEGFC in direct competition with both DMFC and indirect methanol FC. Ethylene glycol (EG) is well known in the automobile industry and in contrast to methanol, its distribution infrastructure already exists, thus it is a promising candidate for practical electric vehicles.

Original languageEnglish
Pages (from-to)245-248
Number of pages4
JournalJournal of Power Sources
Volume106
Issue number1-2
DOIs
StatePublished - 1 Apr 2002
Event7th Grove Fuel Cell Symposium, Grove VII - London, United Kingdom
Duration: 11 Sep 200113 Sep 2001

Keywords

  • Direct methanol fuel cell
  • Direct-oxidation fuel cell
  • Ethylene glycol

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