公开(公告)号：US20220123302A1

公开(公告)日：2022-04-21

申请号：US17565450

申请日：2021-12-29

申请人： Contemporary Amperex Technology Co., Limited

发明人： Shushi DOU ,  Chunhua Hu ,  Yao Jiang ,  Qi Wu ,  Jinhua He ,  Bin Deng

IPC分类号： H01M4/525 ,  H01M4/04 ,  H01M4/131 ,  H01M10/0525

摘要： The present application discloses positive electrode active material, preparation method thereof, positive electrode plate, lithium-ion secondary battery and battery module, pack, and apparatus. The positive electrode active material includes a nickel-containing lithium composite oxide satisfying a chemical formula Li1+a[NixCoyMnzMb]O2, in the formula, M is a doping element at transition metal site, 0.5≤x

公开(公告)号：US11271249B2

公开(公告)日：2022-03-08

申请号：US17056805

申请日：2019-12-13

申请人： Contemporary Amperex Technology Co., Limited

发明人： Tiancheng Yi ,  Chunhua Hu ,  Shushi Dou ,  Yao Jiang ,  Chengdu Liang

IPC分类号： H01M10/0567 ,  C01G51/00 ,  C07D239/04 ,  C07D241/04 ,  C07D251/04 ,  C07D295/145 ,  C07D403/04 ,  H01M4/525 ,  H01M10/0525 ,  H01M10/42 ,  H01M4/02

摘要： This application provides a lithium-ion battery and an apparatus. The lithium-ion battery includes an electrode assembly and an electrolyte. The electrode assembly includes a positive electrode plate, a negative electrode plate, and a separator. A positive active material of the positive electrode plate includes Lix1Coy1M1-y1O2-z1Qz1, where 0.5≤x1≤1.2, 0.8≤y1

公开(公告)号：US11177508B2

公开(公告)日：2021-11-16

申请号：US17146758

申请日：2021-01-12

申请人： Contemporary Amperex Technology Co., Limited

发明人： Yao Jiang ,  Chunhua Hu ,  Tiancheng Yi ,  Shushi Dou ,  Chengdu Liang

IPC分类号： H01M10/0567 ,  H01M4/36 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  C07D239/04 ,  C07D241/04 ,  C07D251/04 ,  H01M4/02

摘要： The present application provides a lithium-ion battery and an apparatus, the lithium-ion battery includes an electrode assembly and an electrolyte, the electrode assembly includes a positive electrode sheet, a negative electrode sheet and a separator. A positive active material of the positive electrode sheet includes both Lix1Coy1M11-y1O2-aQ1a and LilNim1Con1M2pM3qO2-bQ2b, a mass ratio of Lix1Coy1M11-y1O2-aQ1a and LilNim1Con1M2pM3qO2-bQ2b is 1:1-9:1. The electrolyte contains an additive A, the additive A is a six-membered nitrogen heterocyclic compound with multiple nitrile groups and with low oxidation potential. The lithium-ion battery according to the present application has excellent cycle performance and storage performance, especially under high temperature and high voltage conditions.

公开(公告)号：US11152643B2

公开(公告)日：2021-10-19

申请号：US17146758

申请日：2021-01-12

申请人： Contemporary Amperex Technology Co., Limited

发明人： Yao Jiang ,  Chunhua Hu ,  Tiancheng Yi ,  Shushi Dou ,  Chengdu Liang

IPC分类号： H01M10/0567 ,  H01M4/36 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  C07D239/04 ,  C07D241/04 ,  C07D251/04 ,  H01M4/02

摘要： The present application provides a lithium-ion battery and an apparatus, the lithium-ion battery includes an electrode assembly and an electrolyte, the electrode assembly includes a positive electrode sheet, a negative electrode sheet and a separator. A positive active material of the positive electrode sheet includes both Lix1Coy1M11-y1O2-aQ1a and LilNim1Con1M2pM3qO2-bQ2b, a mass ratio of Lix1Coy1M11-y1O2-aQ1a and LilNim1Con1M2pM3qO2-bQ2b is 1:1-9:1. The electrolyte contains an additive A, the additive A is a six-membered nitrogen heterocyclic compound with multiple nitrile groups and with low oxidation potential. The lithium-ion battery according to the present application has excellent cycle performance and storage performance, especially under high temperature and high voltage conditions.