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A stable NH4PO3-glass proton conductor for intermediate temperature fuel cells

Jiang, Yinzhu and Matthieu, Teci and Lan, Rong and Xu, Xiaoxiang and Cowin, Peter Ian and Tao, Shanwen (2011) A stable NH4PO3-glass proton conductor for intermediate temperature fuel cells. Solid State Ionics, 192 (1). pp. 108-112. ISSN 0167-2738

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Abstract

A stable and conductive composite material based on NH4PO3 and amorphous oxides (SiO2-P2O5) has been prepared by a wet-chemical route following with firing in ammonia. The composite showed high proton conductivity in both ambient air and humidified 5% H-2/Ar. A total conductivity of 6.0-19 mS/cm in the temperature range of 150-250 degrees C has been achieved. The conductivity (about 19 mS/cm) is stable in humidified 5% H-2/Ar during ageing at 175 degrees C for over 100 h. This material is a potential electrolyte for intermediate temperature fuel cells and other electrochemical devices.