Methyl phosphate formation as a major degradation mode of direct methanol fuel cells with phosphoric acid based electrolytes

Research output: Contribution to journalJournal article – Annual report year: 2015Researchpeer-review

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Phosphoric acid and phosphoric acid doped polymer membranes are widely used as electrolytes in hydrogen based fuel cells operating at elevated temperatures. Such electrolytes have been explored for direct oxidation of methanol to further increase the versatility of the systems, however, with demonstrated lifetimes of only a few days to weeks. In this work the methyl phosphate formation from the acid and methanol is identified and proposed to be a major mechanism for the cell degradation. Proton conductivity and fuel cell durability tests validate the mechanism at high methanol contents.
Original languageEnglish
JournalJournal of Power Sources
Pages (from-to)517-521
Number of pages5
Publication statusPublished - 2015
CitationsWeb of Science® Times Cited: No match on DOI

    Research areas

  • Degradation, Fuel cell, Methanol, Methyl phosphates, Phosphoric acid, Proton conductivity, Direct methanol fuel cells (DMFC), Durability, Electrolytes, Fuel cells, Methanol fuels, Acid doped, Cell degradations, Direct oxidation, Durability test, Elevated temperature, Methanol content, Proton conductivity and fuel cells, Phosphoric acid fuel cells (PAFC)
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ID: 104825442