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    CATHODE MATERIAL FOR A LITHIUM ION BATTERY AND PREPARATION METHOD AND APPLICATION THEREOF
    3.
    发明公开
    CATHODE MATERIAL FOR A LITHIUM ION BATTERY AND PREPARATION METHOD AND APPLICATION THEREOF 审中-公开

    公开(公告)号：EP4155271A3

    公开(公告)日：2023-04-12

    申请号：EP22206781.1

    申请日：2022-11-10

    申请人： Guizhou Zhenhua E-CHEM Inc.

    发明人： ZHOU, Chaoyi ,  XIANG, Qianxin ,  HUANG, Jin ,  YU, Ye ,  WANG, Lijuan ,  WU, Yang ,  HU, Ansheng

    IPC分类号： C01G53/00 ,  H01M4/525

    摘要： The invention belongs to the technical field of lithium ion battery and specifically relates to a cathode material of lithium ion battery, a preparation method and application thereof. The cathode material of the invention has a porous structure, wherein the pore volume of mesoporous with pore diameter of 2-20nm accounts for 90% or more of the total pore volume, comprising at least two sintering and at least two crushing step of the raw material after mixing. Compared with the conventional lithium-ion battery cathode material, the lithium-ion battery cathode material of the present invention contains mainly mesopores, and the pore size of mesopores is mainly in the range of 2-20nm, there are hardly large pores inside the particles, the distribution of pores between particles is relatively reasonable, which can provide a favorable channel for lithium ion transmission, so a high capacity can be provided and simultaneously the increase in impedance during the battery cycle is relatively small.

    SPHERICAL OR SPHERICAL-LIKE CATHODE MATERIAL FOR LITHIUM-ION BATTERY AND LITHIUM-ION BATTERY
    6.
    发明公开
    SPHERICAL OR SPHERICAL-LIKE CATHODE MATERIAL FOR LITHIUM-ION BATTERY AND LITHIUM-ION BATTERY 审中-公开

    公开(公告)号：EP3444226A1

    公开(公告)日：2019-02-20

    申请号：EP18180773.6

    申请日：2018-06-29

    申请人： Guizhou Zhenhua E-CHEM Inc. ,  Guizhou Zhenhua Yilong E-CHEM Co., Ltd

    发明人： ZHOU, Chaoyi ,  YIN, Zhu'an ,  WANG, Lijuan ,  YANG, Daixiang ,  PENG, Peng ,  XIANG, Qianxin ,  MEI, Ming ,  LI, Lu

    IPC分类号： C01G53/00

    摘要： The present invention relates to a spherical or spherical-like cathode material for lithium-ion battery and a lithium-ion battery. The chemical formula of the cathode material is Li a Ni x Co y Mn z M b O 2 , wherein: 1.02≤a≤1.20; 0.0≤b≤0.5; 0.30≤x≤0.60; 0.20≤y≤0.40; 0.05≤z≤0.50; x+y+z=1; M is one or two or more selected from the group consisting of Mg, Ti, Al, Zr, Y, Co, Mn, Ni, Ba and rare earth elements. Under the scanning electron microscope, the cathode material comprises primary particles with a morphology of spherical or spherical shape, and secondary particles agglomerated by the primary particles. The number percentage of the secondary particles agglomerated by the primary particles is less than or equal to 30%. The lithium battery prepared by the obtained cathode material has high specific capacity, high temperature stability, excellent safety and cycling performance at high temperature, and the preparation method thereof is simple and the cost is relatively low.

    CATHODE MATERIAL FOR A LITHIUM ION BATTERY AND PREPARATION METHOD AND APPLICATION THEREOF
    7.
    发明公开
    CATHODE MATERIAL FOR A LITHIUM ION BATTERY AND PREPARATION METHOD AND APPLICATION THEREOF 审中-公开

    公开(公告)号：EP4155271A2

    公开(公告)日：2023-03-29

    申请号：EP22206781.1

    申请日：2022-11-10

    申请人： Guizhou Zhenhua E-CHEM Inc.

    发明人： ZHOU, Chaoyi ,  XIANG, Qianxin ,  HUANG, Jin ,  YU, Ye ,  WANG, Lijuan ,  WU, Yang ,  HU, Ansheng

    IPC分类号： C01G53/00 ,  H01M4/525

    摘要： The invention belongs to the technical field of lithium ion battery and specifically relates to a cathode material of lithium ion battery, a preparation method and application thereof. The cathode material of the invention has a porous structure, wherein the pore volume of mesoporous with pore diameter of 2-20nm accounts for 90% or more of the total pore volume, comprising at least two sintering and at least two crushing step of the raw material after mixing. Compared with the conventional lithium-ion battery cathode material, the lithium-ion battery cathode material of the present invention contains mainly mesopores, and the pore size of mesopores is mainly in the range of 2-20nm, there are hardly large pores inside the particles, the distribution of pores between particles is relatively reasonable, which can provide a favorable channel for lithium ion transmission, so a high capacity can be provided and simultaneously the increase in impedance during the battery cycle is relatively small.

    LITHIUM ION BATTERY CATHODE MATERIAL AND LITHIUM ION BATTERY
    8.
    发明公开
    LITHIUM ION BATTERY CATHODE MATERIAL AND LITHIUM ION BATTERY 审中-公开

    公开(公告)号：EP3428125A1

    公开(公告)日：2019-01-16

    申请号：EP18180761.1

    申请日：2018-06-29

    申请人： Guizhou Zhenhua E-CHEM Inc. ,  Guizhou Zhenhua Yilong E-CHEM Co., Ltd

    发明人： WANG, Lijuan ,  ZHOU, Chaoyi ,  YIN, Zhu'an ,  PENG, Peng ,  YANG, Daixiang ,  XIANG, Qianxin ,  MEI, Ming ,  LI, Lu

    IPC分类号： C01G53/00

    摘要： The present invention relates to a lithium ion cathode material and a lithium ion battery. The chemical formula of the cathode material is: Li a Ni x Co y Mn z M b O 2 , wherein 1.0≤a≤1.2; 0.00≤b≤0.05; 0.30≤x≤0.60; 0.10≤y≤0.40; 0.15≤z≤0.30; x+y+z=1; M is one or two or more selected from the group consisting of Mg, Ti, Al, Zr, Y, W, Mn,Ba and rare earth elements; wherein the scanning electron microscope observation shows that, the cathode material consists of secondary particles agglomerated by 10 or less primary single crystal particles and secondary particles agglomerated by more than 10 primary single crystal particles, and wherein, the area percentage of the secondary particles agglomerated by 10 or less primary single crystal particles is greater than 80%, and the area percentage of the secondary particles agglomerated by more than 10 primary single crystal particles is less than or equal to 20%. The lithium battery prepared by the cathode material of the present invention has good cycling performance, the preparation method thereof is simple, and can be conveniently and massively produced.