Patent number: 11984590
Abstract: Provided is a positive electrode material for a lithium ion battery, having the following general formula I: Li1+aNixCoyMnzMcM?dO2?bAb general formula I, wherein ?0.05?a?0.3, 0.8?x?1, 0?y?0.2, 0?z?0.2, 0?c?0.01, 0?d?0.01, x+y+z+c+d=1, and 0?b?0.05; M and M? are different from each other and each independently selected from at least one of La, Cr, Mo, Ca, Fe, Ti, Zn, Y, Zr, W, Nb, V, Mg, B, Al, Sr, Ba and Ta, A is selected from at least one of F, Cl, Br, I and S, and the number of crystallite boundaries N in primary particles of the positive electrode material is from 10.5 to 14.5, wherein N is calculated according to Equation I: N=DS/DX Equation I, wherein DS is an average size of the primary particles, as measured from scanning electron microscope (SEM) image of cross section of the positive electrode material, and DX is an average size of crystallites in the primary particles of the positive electrode material, as measured by an XRD test and calculated by the Scherrer equation.
Type:
Grant
Filed:
August 17, 2023
Date of Patent:
May 14, 2024
Assignee:
Beijing Easpring Material Technology Co., Ltd.
Inventors:
Hang Zhang, Yafei Liu, Jingpeng Wang, Xuequan Zhang, Yanbin Chen
Publication number: 20230395793
Abstract: Provided is a positive electrode material for a lithium ion battery, having the following general formula I: Li1+aNixCoyMnzMcM?dO2?bAb general formula I, wherein ?0.05?a?0.3, 0.8?x?1, 0?y?0.2, 0?z?0.2, 0?c?0.01, 0?d?0.01, x+y+z+c+d=1, and 0?b?0.05; M and M? are different from each other and each independently selected from at least one of La, Cr, Mo, Ca, Fe, Ti, Zn, Y. Zr, W, Nb, V, Mg, B, Al, Sr, Ba and Ta, A is selected from at least one of F, Cl, Br, I and S, and the number of crystallite boundaries N in primary particles of the positive electrode material is from 10.5 to 14.5, wherein N is calculated according to Equation I: N=DS/DX Equation I, wherein DS is an average size of the primary particles, as measured from scanning electron microscope (SEM) image of cross section of the positive electrode material, and DX is an average size of crystallites in the primary particles of the positive electrode material, as measured by an XRD test and calculated by the Scherrer equation.
Type:
Application
Filed:
August 17, 2023
Publication date:
December 7, 2023
Inventors:
Hang ZHANG, Yafei LIU, Jingpeng WANG, Xuequan ZHANG, Yanbin CHEN