Thin-membrane solid-acid fuel cell

Tetsuya Uda*, Sossina M. Haile

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

163 Scopus citations


Solid-acid fuel cells (SCFCs) utilize an anhydrous, nonpolymeric proton conducting electrolyte that can operate at slightly elevated temperatures. By supporting thin CsH2PO4 electrolyte membranes (25-36 μm), on porous stainless steel gas-diffusion electrodes, SAFCs with peak power densities as high as 415 mW/cm2 were obtained. Cells were operated at ∼240°C with humidified H2 supplied to the anode and humidified O2 supplied to the cathode. Despite the thinness of the membranes, the open-circuit voltages were high, 0.91-1.01 V. These results transform SAFCs from laboratory curiosities into highly competitive energy conversion devices.

Original languageEnglish (US)
Pages (from-to)A245-A246
JournalElectrochemical and Solid-State Letters
Issue number5
StatePublished - 2005

ASJC Scopus subject areas

  • General Chemical Engineering
  • General Materials Science
  • Physical and Theoretical Chemistry
  • Electrochemistry
  • Electrical and Electronic Engineering


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