Journal
SOLID STATE IONICS
Volume 177, Issue 26-32, Pages 2715-2720Publisher
ELSEVIER
DOI: 10.1016/j.ssi.2006.07.017
Keywords
glass; glass-ceramic; lithium ion conductivity; solid electrolyte; all-solid-state; battery
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In recent years many new glass-based solid electrolytes with high Li+ conductivity have been developed. In the present paper, we review the preparation and characterization of Li2S-based oxysulfide glasses and sulfide glass-ceramics on the basis of two strategies of enhancing Li+ conductivity: the utilization of mixed-anion effect by combining sulfide and oxide anions, and the precipitation of superionic metastable crystals by careful heat-treatment of glasses. The superior Li+ conducting solid electrolytes with the highest conductivity and the lowest activation energy for conduction have been achieved in the Li2S-P2S5 glass-ceramics. The use of these glass-ceramic solid electrolytes leads to the development of a bulk-type all solid-state lithium secondary battery with excellent cycling performance. (c) 2006 Elsevier B.V. All rights reserved.
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