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.
Original language | English |
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Pages (from-to) | 108-112 |
Number of pages | 5 |
Journal | Solid State Ionics |
Volume | 192 |
Issue number | 1 |
DOIs | |
Publication status | Published - 16 Jun 2011 |
Keywords
- Proton conductor
- Conductivity
- NH4PO3
- electrolyte
- composite
- polyphosphate
- stability
- behaviour
- acidity
- CSH2PO4
- silica
- IR