Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1297065 | Solid State Ionics | 2007 | 5 Pages |
Abstract
Previously unrecognized amorphous grain boundary films are shown to provide rapid proton conduction paths in polycrystalline lanthanum phosphates. Experiments reveal the amorphous phosphorus-rich grain boundary films to be stable in air at 773 K, with a conductivity upwards of 2.5 × 10− 3 S/cm at 773 K, many orders of magnitude higher than in the crystalline bulk. The results indicate the possibility of forming stable, high proton-conductivity nanocomposites of RE-phosphate glasses and crystalline ceramics for intermediate temperature (573 K to 773 K) fuel cells.
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Authors
Gabriel Harley, Rong Yu, Lutgard C. De Jonghe,