US 12,294,079 B2
Lithium-manganese rich material, preparation method therefor and use thereof
Jun Wang, Beijing (CN); Yafei Liu, Beijing (CN); and Yanbin Chen, Beijing (CN)
Assigned to BEIJING EASPRING MATERIAL TECHNOLOGY CO., LTD., Beijing (CN)
Appl. No. 17/767,246
Filed by BEIJING EASPRING MATERIAL TECHNOLOGY CO., LTD., Beijing (CN)
PCT Filed Dec. 31, 2020, PCT No. PCT/CN2020/142040
§ 371(c)(1), (2) Date Apr. 7, 2022,
PCT Pub. No. WO2021/136490, PCT Pub. Date Jul. 8, 2021.
Claims priority of application No. 201911422090.2 (CN), filed on Dec. 31, 2019.
Prior Publication US 2022/0393155 A1, Dec. 8, 2022
Int. Cl. C01G 45/22 (2025.01); C01G 45/1228 (2025.01); C01G 53/50 (2025.01); H01M 4/36 (2006.01); H01M 4/505 (2010.01); H01M 4/525 (2010.01); H01M 4/02 (2006.01); H01M 10/0525 (2010.01)
CPC H01M 4/366 (2013.01) [C01G 53/50 (2013.01); H01M 4/505 (2013.01); H01M 4/525 (2013.01); C01P 2002/52 (2013.01); C01P 2002/72 (2013.01); C01P 2004/03 (2013.01); C01P 2004/61 (2013.01); C01P 2004/84 (2013.01); C01P 2006/12 (2013.01); C01P 2006/40 (2013.01); H01M 2004/021 (2013.01); H01M 2004/028 (2013.01); H01M 10/0525 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A lithium-manganese rich material consisting of;
a matrix that contains a first substance represented by a chemical formula Li1.2+x[(Mn1-a-b-cCoaNibMc)1-dM′d]0.8-xO2, wherein −0.11≤x≤0.3, 0≤a≤0.3, 0≤b≤0.3, 0≤c≤0.1, 0≤d≤0.1, M and M′ are respectively and independently at least one element selected from a group consisting of Al, B, Ba, Ce, Cr, Cu, Fe, K, La, Mg, Mo, Na, Nb, Os, Pr, Re, Ru, Sc, Sr, Sm, Ta, Ti, V, W, Y, Yb, Zn and Zr; and
a coating layer on a surface of the matrix, wherein the coating layer contains a second substance represented by a chemical formula Liu (Li1-v-γNvN′γ)O2, wherein 0.8≤u<1.2, 0.6≤v≤0.9, 0≤γ<0.1, N is at least one element selected from the group consisting of Mn, Co, Ni, Fe, Ru and Mo; N′ is at least one element selected from the group consisting of Al, B, Ba, Ce, Cr, Co, Cu, Fe, K, La, Mg, Mn, Mo, Na, Nb, Ni, Os, Pr, Re, Ru, Sc, Sr, Sm, Ta, Ti, V, W, Y, Yb, Zn and Zr; the element N and the element N′ are different;
wherein a content ratio by weight of the matrix to the coating layer in the material is 100:0.01-10.