Title:
ALL-SOLID BATTERY
Document Type and Number:
Japanese Patent JP2020174004
Kind Code:
A
Abstract:
To reduce the resistance during high-rate charging/discharging and alleviate the difference in SOC occurring in a negative electrode in an all-solid battery containing lithium titanate as a negative electrode active material.SOLUTION: An all-solid battery 101 includes a positive electrode 30, a solid electrolyte layer 50, and a negative electrode 40. A negative electrode active material layer 41 includes a first layer 1 and a second layer 2. The first layer 1 is interposed between the negative electrode current collector 41 and the second layer 2. The second layer 2 is interposed between the solid electrolyte layer 50 and the first layer 1. The first layer 1 contains a first negative electrode active material. The second layer 2 contains a second negative electrode active material. The second negative electrode active material is lithium titanate. The electron conductivity of the first negative electrode active material is higher than that of the second negative electrode active material. The average reaction potential of the first negative electrode active material is lower than the average reaction potential of the second negative electrode active material and higher than the average reaction potential of graphite.SELECTED DRAWING: Figure 3
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Inventors:
TAKAI TOMOAKI
NAGANO AIKO
NAGANO AIKO
Application Number:
JP2019076131A
Publication Date:
October 22, 2020
Filing Date:
April 12, 2019
Export Citation:
Assignee:
SOKEN INC
TOYOTA MOTOR CORP
TOYOTA MOTOR CORP
International Classes:
H01M10/052; H01M4/131; H01M4/36; H01M4/485; H01M10/0562
Attorney, Agent or Firm:
Fukami patent office