US 12,136,730 B2
Modified positive electrode material and preparation method therefor, and lithium ion battery
Bryan Yonemoto, Clearwater, FL (US); Huijie Guo, Zhejiang (CN); and Wenjuan Liu Mattis, Zhejiang (CN)
Assigned to Microvast Power Systems Co., Ltd., Huzhou (CN); and Microvast, .Inc., Stafford, TX (US)
Filed by Microvast Power Systems Co., Ltd., Zhejiang (CN); and Microvast, Inc., Stafford, TX (US)
Filed on Nov. 25, 2021, as Appl. No. 17/535,602.
Prior Publication US 2023/0163275 A1, May 25, 2023
Int. Cl. H01M 4/36 (2006.01); C01G 53/00 (2006.01); H01M 4/505 (2010.01); H01M 4/525 (2010.01); H01M 4/02 (2006.01)
CPC H01M 4/366 (2013.01) [C01G 53/50 (2013.01); H01M 4/505 (2013.01); H01M 4/525 (2013.01); C01P 2004/03 (2013.01); C01P 2006/40 (2013.01); H01M 2004/028 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A modified positive electrode material, comprising:
a core, the core being a positive electrode material containing a manganese element and a nickel element; and
a coating layer, the coating layer comprising a first oxide coating layer, the first oxide coating layer coating on a surface of the core by a mechanical fusion treatment, and a first element forming the first oxide coating layer comprising, one or more of a group consisting of Si, Ti, V, Zr, Mo, W, Bi, Nb, and Ru;
the modified positive electrode material further comprising: a second oxide coating layer, the second oxide coating layer coating on a surface of the core, and being arranged between the positive electrode material and the first oxide coating layer, and a second element forming the second oxide coating layer being selected from elements of Group IVB and/or Group VB;
the modified positive electrode material is denoted by the following general formula: Li1+iNixCoyMn(1-x-y)MmO2·[MO2]n, −0.05≤i≤0.2, 0.5≤x≤0.8, 0.05≤y≤0.3, 0≤m≤0.03, and 0≤n≤0.05, wherein M of Li1+iNixCoyMn(1-x-y)MmO2 represents the second element, and M of [MO2]n represents the first element.