Raman imaging for LiCoO2 composite positive electrodes in all-solid-state lithium batteries using Li2S-P2S5 solid electrolytes

JOURNAL OF POWER SOURCES

卷:302

Article

Otoyama, Misae¹  Ito, Yusuke¹  Hayashi, Akitoshi¹  Tatsumisago, Masahiro¹ 

[1] Osaka Prefecture Univ, Dept Appl Chem, Grad Sch Engn, Naka Ku, Sakai, Osaka 5998531, Japan

关键词: All-solid-state battery;    Lithium battery;    Raman spectroscopy;    LiCoO2;    Solid electrolyte;   

DOI  :  10.1016/j.jpowsour.2015.10.040

来源: Elsevier

【 摘 要 】

A composite positive electrode in an all-solid-state battery is prepared by mixing LiCoO2 particles and Li2S-P2S5 solid electrolytes. Raman spectroscopy is conducted for the composite positive electrodes before and after the initial charging process. Raman spectral changes are observed, which corresponds to structural changes of LiCoO2 particles during the charge test. However, some spectra indicate that several LiCoO2 particles show no structural changes although the cell is fully charged. A local state-of-charge (SOC) distribution map of the composite electrode is obtained by Raman mapping. The mapping image after the charge test shows that distributions of reactions exist in the composite positive electrode. (C) 2015 Elsevier B.V. All rights reserved.

【 授权许可】

Free