Journal
JOURNAL OF MATERIALS CHEMISTRY
Volume 22, Issue 30, Pages 15247-15254Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2jm32490c
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Funding
- Grants-in-Aid for Scientific Research [21246098] Funding Source: KAKEN
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LiCoO2 particles were coated with cobalt and nickel sulfides by thermal decomposition of their respective diethyldithiocarbamato complexes. All-solid-state lithium secondary batteries were fabricated using the coated LiCoO2 positive electrode and a Li2S-P2S5 solid electrolyte. The coatings reduced the interfacial resistance between LiCoO2 and the Li2S-P2S5 solid electrolyte of the all-solid-state batteries after the first charge, resulting in an improved cell performance. The all-solid-state cell with NiS-coated LiCoO2 was charged and discharged at a high rate of 10 C. The coatings reduced deterioration of the interface between LiCoO2 and the Li2S-P2S5 solid electrolyte, indicating that they function as an effective buffer layer at the interface.
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