Electrochemistry
Online ISSN : 2186-2451
Print ISSN : 1344-3542
ISSN-L : 1344-3542
Articles
Ex-situ Analysis of Lithium Distribution in a Sulfide-based All-solid-state Lithium Battery by Particle-induced X-ray and Gamma-ray Emission Measurements
Yuto YAMADAKota SUZUKI Kazuhiro YOSHINOSou TAMINATOTakahiro SATOHMartin FINSTERBUSCHTomihiro KAMIYAAkiyoshi YAMAZAKIYoshiaki KATOKazuhisa FUJITAKunioki MIMASatoshi HORIMasaaki HIRAYAMARyoji KANNO
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2020 Volume 88 Issue 1 Pages 45-49

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Abstract

Lithium distribution in the composite electrode of an all-solid-state lithium battery was analyzed by microbeam-particle-induced X-ray emission and gamma-ray emission techniques. Two kinds of pellet-type cells, incorporating LiCoO2 as the cathode-active material and the superionic conductor Li10GeP2S12 as the solid electrolyte, were prepared: one in the as-prepared state and the other in the charged state. Changes in the lithium distribution near the interface of the composite cathode and separator were visualized by normalizing lithium/cobalt and lithium/germanium intensity. Lithium extraction from LiCoO2 due to charging was confirmed by the decrease in normalized intensity at the cathode composite region. The evaluation of the lithium concentration variation in the composite electrode for the all-solid-state battery during the electrochemical reactions could provide essential information for construction of a favorable composite electrode to enable preparing high-performance all-solid-state lithium batteries.

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© 2020 The Electrochemical Society of Japan
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