Title:
ALL-SOLID-STATE LITHIUM ION BATTERY AND NEGATIVE ELECTRODE MIX
Document Type and Number:
WIPO Patent Application WO/2020/116324
Kind Code:
A1
Abstract:
The present invention pertains to an all-solid-state lithium ion battery comprising a negative electrode mix layer, a positive electrode mix layer, and a solid electrolyte layer, and characterized in that the negative electrode mix layer contains 35.0-80.0 mass% of a negative electrode active material, 19.0-64.0 mass% of a solid electrolyte, and at least 0.1 and less than 5.0 mass% of a conductive aid, wherein the negative electrode active material contains non-agglomerated graphite particles having a graphite crystal plane spacing d002 of 0.3354-0.3370 nm, and a D50, which is a 50% diameter of at least 0.1 μm and less than 10.0 μm in a volume cumulative particle size distribution, and the solid electrolyte is at least one selected from among an oxide-based solid electrolyte and a sulfide-based solid electrolyte and is composed of particles having a D50 of 0.10-3.00 μm. According to the present invention, an all-solid-state lithium ion battery having good contact between a solid electrolyte and a negative electrode active material and having excellent rate characteristics, cycle characteristics, and Coulomb efficiency can be provided.
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Inventors:
SOTOWA CHIAKI (JP)
Application Number:
PCT/JP2019/046657
Publication Date:
June 11, 2020
Filing Date:
November 28, 2019
Export Citation:
Assignee:
SHOWA DENKO KK (JP)
International Classes:
H01M4/133; H01M4/36; H01M4/587; H01M4/62; H01M10/0525; H01M10/0562
Domestic Patent References:
| WO2018123967A1 | 2018-07-05 | |||
| WO2015152214A1 | 2015-10-08 | |||
| WO2015152215A1 | 2015-10-08 |
Foreign References:
| JP2012243645A | 2012-12-10 |
Attorney, Agent or Firm:
SAKAMOTO & PARTNERS (JP)
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