Mitsubishi Electric Corporation

Dow Global Technolgoies LLC

Jiangsu Hengtron Nanotech Co., Ltd.

Hideaki Maeda

Fumio Matsumoto

Wataru Yamada

Kiyonori Koga

Shingo Kingetsu

Shinichi Kimata

Ing-Feng Hu

Murali G Theivanayagam

Jui-Ching Lin

Liang Chen

Michael A Lowe

Yu-Hua Kao

Jianxin Ma

Michael Lowe

A method for forming lithium metal oxides comprised of Ni, Mn and Co useful for making lithium ion batteries comprises providing precursor particulates of Ni and Co that are of a particular size that allows the formation of improved lithium metal oxides. The method allows the formation of lithium metal oxides having improved safety while retaining good capacity and rate capability. In particular, the method allows for the formation of lithium metal oxide where the primary particle surface Mn/Ni ratio is greater than the bulk Mn/Ni. Likewise the method allows the formation of lithium metal oxides with secondary particles having much higher densities allowing for higher cathode densities and battery capacities while retaining good capacity and rate performance.

Lithium metal oxide cathode materials and method to make them

An improved method of making a cathode for use in a lithium ion battery is comprised of mixing a lithium metal oxide and lithium metal phosphate in a solvent, where both of these are comprised of primary particles that have been agglomerated into secondary particles of particular size and mixing is insufficient to break up the particles of the lithium metal phosphate, coating the mixture of step (A) on to a metal foil and removing the solvent to form the cathode. The lithium metal oxide is also desirably not broken either. The cathode may be one that has lithium metal oxide and a particular lithium metal phosphate wherein the majority of the metal is Mn.

Lithium ion batteries

Turbine generator

Growing community of inventors

Tokyo, Japan

Hideaki Maeda