Proton transport paths in lanthanum phosphate electrolytes

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...

Full description

Saved in:
Bibliographic Details
Published inSolid state ionics Vol. 178; no. 11; pp. 769 - 773
Main Authors Harley, Gabriel, Yu, Rong, De Jonghe, Lutgard C.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 15.05.2007
Subjects
Amorphous
Glass
Grain boundary
Intermediate temperature fuel cell
LaP 3O 9
LaPO 4
Proton conduction
Amorphous
Intermediate temperature fuel cell
LaPO 4
Proton conduction
Glass
LaP 3O 9
Grain boundary
Online AccessGet full text

Cover

More Information
Summary: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.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0167-2738
1872-7689
DOI:10.1016/j.ssi.2007.03.011