Configuring PSx tetrahedral clusters in Li-excess Li7P3S11 solid electrolyte

Title
Configuring PSx tetrahedral clusters in Li-excess Li7P3S11 solid electrolyte
Authors
이종호김형철손지원정훈기윤빈나최성준정으뜸이종흔
Keywords
electrolytes; sulfur compounds; ceramics; ionic conductivity; batteries
Issue Date
2018-04
Publisher
APL materials
Citation
VOL 6, NO 4, 047902
Abstract
We demonstrate that the Li-ion conductivity can be improved by adding a certain amount of Li (x = 0.25– 0.5) as a charge carrier to the composition of glass-ceramic Li7+xP3S11. Structural analysis clarified that the structural changes caused by the ratio of ortho-thiophosphate tetrahedra PS4 3 and pyro-thiophosphate ditetrahedra P2S7 4 affect the Li-ion conductivity. The ratio of PS4 3 and P2S7 4 varies depending on x and the highest Li-ion conductivity (2.5  10 3 S cm 1) at x = 0.25. All-solidstate LiNi0.8Co0.15Al0.05O2/Li7.25P3S11/In-metal cell exhibits the discharge capacity of 106.2 mAh g 1. This ion conduction enhancement from excess Li is expected to contribute to the future design of sulfide-type electrolytes.
URI
http://pubs.kist.re.kr/handle/201004/67248
ISSN
2166-532X
Appears in Collections:
KIST Publication > Article
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