COMPOSITE POSITIVE ELECTRODE ACTIVE MATERIAL

Title:

COMPOSITE POSITIVE ELECTRODE ACTIVE MATERIAL

Document Type and Number:

Japanese Patent JP2023128674

Kind Code:

A

Abstract:

To provide a composite positive electrode active material which can reduce the resistance increase rate of a battery.SOLUTION: The composite positive electrode active material includes: a lithium metal oxide as a positive electrode active material; and a coating layer for covering a part of the surface of the positive electrode active material. The coating layer includes a Li element, a B element, and an O element. The mole ratio Li/B of the Li element to the B element of the coating layer is in the range of 0.1 to 0.8. The intensity ratio Iα/Iβ of the intensity Iα of the peak of 720 cm-1 to the intensity Iβ of the peak of 780 cm-1 in a Raman spectrum measurement is in the range of 1.0 to 1.5. The coverage of the coating layer covering the positive electrode active material is larger than 57%.SELECTED DRAWING: Figure 1

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Inventors:

WATANABE HIDEAKI

Application Number:

JP2022033196A

Publication Date:

September 14, 2023

Filing Date:

March 04, 2022

Export Citation:

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Assignee:

TOYOTA MOTOR CORP

International Classes:

H01M4/525; H01M4/36; H01M4/505; H01M6/18; H01M10/052; H01M10/0562

Attorney, Agent or Firm:

Tatsuto Kishimoto
Akihiko Yamashita
Noriaki Yamamoto

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