High rate capabilities of all-solid-state lithium secondary batteries using Li4Ti5O12-coated LiNi0.8Co0.15Al0.05O2 and a sulfide-based solid electrolyte期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

High rate capabilities of all-solid-state lithium secondary batteries using Li₄Ti₅O₁₂-coated LiNi_0.8Co_0.15Al_0.05O₂ and a sulfide-based solid electrolyte

Authors:	Yoshikatsu Seino Tsuyoshi OtaKazunori Takada

Affiliation:	^a Idemitsu Kosan Co. Ltd., Kami-izumi 1280, Sodegaura, Chiba 299-0293, Japan ^b International Center for Materials Nanoarchitectonica, National Institute for Materials, Namiki 1-1, Tsukuba, Ibaraki 305-0044, Japan

Abstract:	Rate capability of LiNi_0.8Co_0.15Al_0.05O₂ in solid-state cells was investigated with 70Li₂S-30P₂S₅ glass-ceramics as a sulfide solid electrolyte. It showed higher rate capability than LiCoO₂; discharge capacity observed at a current density of 10 mA cm⁻² was ca. 70 mAh g⁻¹. Surface coating with Li₄Ti₅O₁₂ onto the LiNi_0.8Co_0.15Al_0.05O₂ particles further improved the high-rate performance to give ca. 110 mAh g⁻¹. The rate capability promises to realize all-solid-state lithium secondary batteries with very high performance.

Keywords:	Lithium battery Solid electrolyte Buffer layer Lithium nickel oxide Sulfide Solid state battery
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