US Patent Application 18249901. METHOD FOR FORMING POSITIVE ELECTRODE ACTIVE MATERIAL, POSITIVE ELECTRODE, SECONDARY BATTERY, ELECTRONIC DEVICE, POWER STORAGE SYSTEM, AND VEHICLE simplified abstract

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METHOD FOR FORMING POSITIVE ELECTRODE ACTIVE MATERIAL, POSITIVE ELECTRODE, SECONDARY BATTERY, ELECTRONIC DEVICE, POWER STORAGE SYSTEM, AND VEHICLE

Organization Name

Semiconductor Energy Laboratory Co., Ltd.

Inventor(s)

Shunpei Yamazaki of Setagaya, Tokyo (JP)

Tetsuya Kakehata of lsehara, Kanagawa (JP)

Shuhei Yoshitomi of Ayese, Kanagawa (JP)

Atsushi Kawatsuki of Atsugi, Kanagawa (JP)

METHOD FOR FORMING POSITIVE ELECTRODE ACTIVE MATERIAL, POSITIVE ELECTRODE, SECONDARY BATTERY, ELECTRONIC DEVICE, POWER STORAGE SYSTEM, AND VEHICLE - A simplified explanation of the abstract

This abstract first appeared for US patent application 18249901 titled 'METHOD FOR FORMING POSITIVE ELECTRODE ACTIVE MATERIAL, POSITIVE ELECTRODE, SECONDARY BATTERY, ELECTRONIC DEVICE, POWER STORAGE SYSTEM, AND VEHICLE

Simplified Explanation

This patent application describes a positive electrode active material and a secondary battery that are stable in high potential and high temperature conditions, ensuring safety.

  • The positive electrode consists of two materials, with the second material covering part of the surface of the first material.
  • The first material is a lithium cobalt oxide containing magnesium, fluorine, aluminum, and nickel.
  • The second material is a composite oxide with an olivine crystal structure, containing one or more elements from Fe, Ni, Co, and Mn.
  • The combination of these materials provides stability in high potential and high temperature states.
  • The innovation aims to create a highly safe secondary battery with improved performance and stability.


Original Abstract Submitted

A positive electrode active material that is stable in a high potential state or a high temperature state and a highly safe secondary battery are provided. The positive electrode includes a first material and a second material and includes a region where at least part of a surface of the first material is covered with the second material. The first material includes a lithium cobalt oxide containing magnesium, fluorine, aluminum, and nickel. The second material includes a composite oxide (containing one or more selected from Fe, Ni, Co, and Mn) having an olivine crystal structure.

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