Journal article · Conference paper
Metal Phosphates as Intermediate Temperature Proton Conducting Electrolytes
A series of metal phosphates were synthesized and screened as potential proton conductor electrolytes for fuel cells and electrolysers operational at intermediate temperatures. Among the selected, niobium and bismuth phosphates exhibited a proton conductivity of 10-2 and 10-7 S cm-1, respectively, under the anhydrous atmosphere at 250 °C, showing close correlation with the presence of hydroxyl groups in the phosphate phases.
At the water partial pressure of above 0.6 atm, both phosphates possessed a proton conductivity to a level of above 3 x 10-2 S cm-1. Reasonable stability of the proton conductivity was observed under either a constant low water partial pressure or under a humidity cycling test within a period of more than 80 hours.
Language: | English |
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Publisher: | The Electrochemical Society |
Year: | 2012 |
Pages: | 99-104 |
Proceedings: | 221st ECS Meeting |
ISSN: | 19386737 and 19385862 |
Types: | Journal article and Conference paper |
DOI: | 10.1149/1.3701296 |
ORCIDs: | Jensen, Jens Oluf and Bjerrum, Niels |