18531752. LITHIUM NICKEL MANGANESE COMPOSITE OXIDE, POSITIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY, LITHIUM SECONDARY BATTERY, AND METHOD OF PRODUCING LITHIUM NICKEL MANGANESE COMPOSITE OXIDE simplified abstract (HONDA MOTOR CO., LTD.)

LITHIUM NICKEL MANGANESE COMPOSITE OXIDE, POSITIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY, LITHIUM SECONDARY BATTERY, AND METHOD OF PRODUCING LITHIUM NICKEL MANGANESE COMPOSITE OXIDE

Organization Name

HONDA MOTOR CO., LTD.

Inventor(s)

Kazuki Chiba of Wako-shi (JP)

Kazumasa Sakatsume of Wako-shi (JP)

Akihisa Tanaka of Wako-shi (JP)

Takashi Hakari of Wako-shi (JP)

Yoshiya Fujiwara of Wako-shi (JP)

Yoshiyuki Morita of Wako-shi (JP)

LITHIUM NICKEL MANGANESE COMPOSITE OXIDE, POSITIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY, LITHIUM SECONDARY BATTERY, AND METHOD OF PRODUCING LITHIUM NICKEL MANGANESE COMPOSITE OXIDE - A simplified explanation of the abstract

This abstract first appeared for US patent application 18531752 titled 'LITHIUM NICKEL MANGANESE COMPOSITE OXIDE, POSITIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY, LITHIUM SECONDARY BATTERY, AND METHOD OF PRODUCING LITHIUM NICKEL MANGANESE COMPOSITE OXIDE

The present invention pertains to a lithium nickel manganese composite oxide with secondary particles containing aggregated primary particles, represented by General Formula (1): LiNiMnO (where x is 0.95≤x≤1.1, y is 0.45≤y≤0.5, z is 0.45≤z≤0.5, and y=z is satisfied). The oxide has a manganese-rich layer from the surface towards the inside of the secondary particles, with a Mn/Ni ratio in the layer between 1.0 and 1.5. It has a space group R-3m, an a-axis lattice constant of 2.87 Å to 2.90 Å, and a c-axis lattice constant of 14.28 Å to 14.32 Å.

• Key Features and Innovation:
• Lithium nickel manganese composite oxide with secondary particles
• Manganese-rich layer within the secondary particles
• Specific Mn/Ni ratio in the manganese-rich layer
• Defined space group and lattice constants

• Potential Applications:
• Lithium-ion batteries
• Energy storage systems
• Electric vehicles

• Problems Solved:
• Enhanced battery performance
• Improved energy density
• Better cycling stability

• Benefits:
• Higher efficiency in energy storage
• Longer battery lifespan
• Increased overall performance

• Commercial Applications:
• Lithium-ion battery manufacturers
• Energy storage companies
• Electric vehicle industry suppliers

• Prior Art:
• Researchers in the field of lithium-ion battery materials
• Companies specializing in battery technology

• Frequently Updated Research:
• Ongoing studies on optimizing lithium nickel manganese composite oxides for better battery performance

Questions about lithium nickel manganese composite oxide:

1. What are the specific characteristics of the manganese-rich layer in the secondary particles? 2. How does the defined Mn/Ni ratio contribute to the performance of the oxide in lithium-ion batteries?

Original Abstract Submitted

The present invention relates to a lithium nickel manganese composite oxide which includes secondary particles in which a plurality of primary particles are aggregated with each other, and is represented by General Formula (1): LiNiMnO(in Formula (1), x is 0.95≤x≤1.1, y is 0.45≤y≤0.5, z is 0.45≤z≤0.5, and y=z is satisfied), wherein Li contained in a transition metal layer does not form LiMn, wherein the lithium nickel manganese composite oxide has a manganese-rich layer from a surface of the secondary particles toward an inside of the secondary particles, wherein a ratio of a number of Mn atoms to a number of Ni atoms (Mn/Ni ratio) in the manganese-rich layer is 1.0 or more and 1.5 or less, and wherein the lithium nickel manganese composite oxide has a space group R-3m, an a-axis lattice constant of 2.87 Å to 2.90 Å, and a c-axis lattice constant of 14.28 Å to 14.32 Å.