公开(公告)号：US10826121B2

公开(公告)日：2020-11-03

申请号：US15891197

申请日：2018-02-07

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Feng Ju ,  Shaowei Feng ,  Changlong Han ,  Xiaochong Zhou ,  Ming Zhang

IPC: H01M10/0567 ,  H01M10/0569 ,  H01M10/0525

Abstract: The present disclosure provides an electrolyte and a secondary battery. The electrolyte comprises: a non-aqueous organic solvent; an electrolyte salt dissolved in the non-aqueous organic solvent; and an additive dissolved in the non-aqueous organic solvent. The additive comprises a first additive, the first additive is selected from boron phosphate represented by formula 1. When the electrolyte of the present disclosure is applied in the secondary battery, the performances of the secondary battery under high temperature environment can be effectively improved.

公开(公告)号：US20190355983A1

公开(公告)日：2019-11-21

申请号：US16415043

申请日：2019-05-17

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Ming Zhang ,  Hao Zhang ,  Cuiping Zhang ,  Changlong Han ,  Chenghua Fu

IPC: H01M4/36 ,  H01M4/131 ,  H01M4/485 ,  H01M4/60 ,  H01M10/0525

Abstract: The present disclosure provides a lithium ion battery including a positive electrode plate, a negative electrode plate, a separator, and an electrolyte. The positive electrode plate includes a positive electrode current collector, and a positive electrode film disposed on a surface of the positive electrode current collector and containing a positive electrode active material. The positive electrode active material includes a matrix, a first coating layer on the matrix in form of discrete islands, and a second coating layer on the first coating layer and the matrix as a continuous layer. The electrolyte includes an additive A and an additive B. The additive A is selected from a group consisting of cyclic sulfate compounds represented by Formula 1 and Formula 2, and combinations thereof, and the additive B is one or two selected from lithium difluorobisoxalate phosphate and lithium tetrafluorooxalate phosphate.

公开(公告)号：US20180294483A1

公开(公告)日：2018-10-11

申请号：US15942178

申请日：2018-03-30

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Ming Zhang ,  Changlong Han

IPC: H01M4/62 ,  H01M4/525 ,  H01M4/505 ,  H01M10/0525

Abstract: The present disclosure provides a positive electrode plate and an energy storage device. The positive electrode plate comprises a positive current collector and a positive electrode film provided on the positive current collector and comprising a positive electrode active material; the positive electrode film further comprises an additive, the additive comprises a C—C double bond-containing sultone. When the positive electrode plate of the present disclosure is applied in the energy storage device, the energy storage device has lower direct current internal resistance, excellent high temperature storage performance, excellent high temperature thermal stability performance and excellent low temperature lithium precipitation performance at the same time.

公开(公告)号：US20240274811A1

公开(公告)日：2024-08-15

申请号：US18645356

申请日：2024-04-24

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Zaiyu Zhuang ,  Yale Wu ,  Ming Zhang ,  Tongxian Zhang

IPC: H01M4/505 ,  C01B32/159 ,  C01B32/174 ,  H01M4/02 ,  H01M4/131 ,  H01M4/62 ,  H01M10/0525

CPC classification number: H01M4/505 ,  C01B32/159 ,  C01B32/174 ,  H01M4/131 ,  H01M4/625 ,  H01M10/0525 ,  C01B2202/02 ,  C01B2202/22 ,  C01P2006/40 ,  H01M2004/021 ,  H01M2004/028

Abstract: Provided are a positive electrode material, a positive electrode plate, a secondary battery, a battery module, a battery pack, and an electrical apparatus. The positive electrode material comprises a manganese-containing active material and a functionalized carbon nanotube, where a surface of the functionalized carbon nanotube comprises lone pair electrons. The lone pair electrons on the surface of the functionalized carbon nanotube have a strong coordination capability. During charging and discharging of the secondary battery, the lone pair electrons can form a coordination structure with Mn2+ dissolved from the manganese-containing active material, to reduce the dissolution of the Mn2+, thereby improving a manganese dissolution phenomenon of the secondary battery, and then improving cycling performance of the secondary battery.

公开(公告)号：US11522214B2

公开(公告)日：2022-12-06

申请号：US17320258

申请日：2021-05-14

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Chengdu Liang ,  Cuiping Zhang ,  Changlong Han ,  Ming Zhang ,  Peipei Chen ,  Hailin Zou

IPC: H01M10/0525 ,  H01M10/04 ,  H01M10/0585 ,  H01M10/0568 ,  H01M10/0567 ,  H01M10/0569 ,  H01M4/131 ,  H01M4/02

Abstract: This application relates to lithium-ion batteries and related battery modules, battery packs and devices. Specifically, the lithium-ion battery includes a positive electrode plate, a negative electrode plate, an electrolyte, and a separator, wherein the positive electrode plate includes aluminum foil as a positive electrode current collector, and a content of element copper atom as an impurity per unit area of the aluminum foil is from 0.009 g/m2 to 0.021 g/m2, and the electrolyte contains first lithium salt and additive A, and the first lithium salt is a fluorine-containing sulfonimide lithium salt, and relative to total molar amount of lithium salt in the electrolyte, the fluorine-containing sulfonimide lithium salt has a molar amount of 30 mol % or higher; and the additive A is at least one of a phosphate compound containing an unsaturated bond, a cyclic compound containing a —SO2— bond and a silicon-oxygen compound containing an unsaturated bond.

公开(公告)号：US11196086B2

公开(公告)日：2021-12-07

申请号：US17131803

申请日：2020-12-23

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Chengdu Liang ,  Cuiping Zhang ,  Ming Zhang ,  Peipei Chen ,  Hailin Zou ,  Liye Li

IPC: H01M10/0568 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0569 ,  H01M4/525 ,  C07C311/48 ,  C07D327/00 ,  H01M4/02

Abstract: The present application relates to a lithium ion battery, comprising: a positive electrode plate, a negative electrode plate, a separator disposed between the positive electrode plate and the negative electrode plate, and an electrolytic solution, the positive electrode plate including a positive electrode current collector and a positive electrode active material layer provided on at least one side of the positive electrode current collector, and the electrolytic solution including an organic solvent, a lithium salt and an additive, wherein the lithium salt comprises a primary lithium salt, the primary lithium salt is a first compound in an amount of 30% or more relative to the total molar amount of the lithium salt, and the first compound has a structure represented by the following formula I, and wherein the additive comprises a second compound represented by the following formula II.

公开(公告)号：US20190356015A1

公开(公告)日：2019-11-21

申请号：US16414978

申请日：2019-05-17

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Ming Zhang ,  Changlong Han ,  Hao Zhang ,  Cuiping Zhang

IPC: H01M10/0525 ,  H01M10/04 ,  H01M4/60

Abstract: The present disclosure provides a lithium ion battery including a positive electrode plate, a negative electrode plate, a separator, and an electrolyte. The positive electrode plate includes a positive electrode current collector, and a positive electrode film disposed on a surface of the positive electrode current collector and containing a positive electrode active material. The positive electrode active material includes a matrix, a first coating layer on the matrix in form of discrete islands, and a second coating layer on the first coating layer and the matrix as a continuous layer. The electrolyte includes an additive A and an additive B. The additive A is selected from a group consisting of cyclic sultone compounds represented by Formula 1 and Formula 2, and combinations thereof, and the additive B is one or two selected from lithium difluorobisoxalate phosphate and lithium tetrafluorooxalate phosphate.