期刊
SOLID STATE IONICS
卷 178, 期 11-12, 页码 769-773出版社
ELSEVIER
DOI: 10.1016/j.ssi.2007.03.011
关键词
LaPO4; LaP3O9; amorphous; grain boundary; glass; proton conduction; intermediate temperature fuel cell
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 x 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. Published by Elsevier B.V.
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