US 12,438,151 B2
Positive electrode active material and its preparation method, sodium ion battery and apparatus containing the sodium ion battery
Qian Liu, Ningde (CN); Yongsheng Guo, Ningde (CN); Chengdu Liang, ningde (CN); and Wenguang Lin, Ningde (CN)
Assigned to Contemporary Amperex Technology (Hong Kong) Limited, Hong Kong (CN)
Filed by CONTEMPORARY AMPEREX TECHNOLOGY (HONG KONG) LIMITED, Hong Kong (CN)
Filed on Jul. 9, 2021, as Appl. No. 17/371,231.
Application 17/371,231 is a continuation of application No. PCT/CN2020/070135, filed on Jan. 2, 2020.
Claims priority of application No. 201910026561.1 (CN), filed on Jan. 11, 2019.
Prior Publication US 2021/0336258 A1, Oct. 28, 2021
Int. Cl. H01M 4/505 (2010.01); H01M 4/02 (2006.01); H01M 4/04 (2006.01); H01M 4/525 (2010.01); H01M 10/054 (2010.01)
CPC H01M 4/505 (2013.01) [H01M 4/0471 (2013.01); H01M 4/525 (2013.01); H01M 10/054 (2013.01); H01M 2004/021 (2013.01); H01M 2004/028 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A positive electrode active material, satisfying a chemical formula Na2+xCuhMnkMlO7-y, wherein Mis one or more selected from Li, B, Mg, Al, K, Ca, Ti, V, Cr, Fe, Co, Ni, Zn, Ga, Sr, Y, Nb, Mo, Sn, Ba and W, 0≤x≤0.5, 0.1<h≤2, 1≤k≤3, 0≤l≤0.5, and 0≤y≤1, 3.0≤h+k+l≤3.1, and 0.7≤(2+x)/(h+k+l)≤0.73, and
wherein the positive electrode active material has a powder resistivity of from 10 Ω·cm to 3kΩ·cm at a pressure of 12 MPa,
wherein the positive electrode active material has a specific surface area of from 0.01 m2/g to 3 m2/g; and,
wherein the positive electrode active material has a mean particle size DV50 of from 7 μm to 25 μm.