Journal
ELECTROCHEMICAL AND SOLID STATE LETTERS
Volume 12, Issue 9, Pages B138-B140Publisher
ELECTROCHEMICAL SOC INC
DOI: 10.1149/1.3168516
Keywords
hydrogen compounds; polymers; proton exchange membrane fuel cells; sulphur compounds
Funding
- Office of Naval Research
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The poisoning effect of H(2)S and SO(2) in air is compared for phosphoric-acid-doped polybenzimidazole (PBI) membrane and perfluorosulfonic acid (Nafion) proton exchange membrane fuel cells (PEMFCs). The cathodes of PBI PEMFCs are about 70 times more resistant to 1 ppm of H(2)S or SO(2) than the Nafion PEMFCs. The PBI PEMFCs only lose < 2% in cell performance when exposed to 1 ppm of H(2)S or SO(2) and have 5.2 and 7.1% losses with 5 and 10 ppm H(2)S over 24 h, respectively. Purging the poisoned PBI cells with neat air leads to complete performance recovery.
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