公开(公告)号：US10763546B2

公开(公告)日：2020-09-01

申请号：US16027000

申请日：2018-07-03

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xiaomei Wang ,  Bin Jiang ,  Chenghua Fu ,  Jiqiong Liu ,  Yan Zhou ,  Jianwei Zhu ,  Changlong Han ,  Wenhao Liu

IPC: H01M10/0565 ,  H01M10/0525 ,  H01M10/0569 ,  H01M10/0567 ,  H01M10/052 ,  H01G11/64 ,  H01G11/56 ,  H01M4/583 ,  H01M4/525 ,  H01M10/058 ,  H01M4/505 ,  H01M10/44 ,  H01M4/02 ,  H01G11/06

Abstract: The present disclosure provides an electrolyte and an electrochemical energy storage device. The electrolyte comprises an electrolyte salt and an additive. The additive comprises a sulfonic ester cyclic quaternary ammonium salt and a fluorocarbon surfactant. Under the combined effect of the sulfonic ester cyclic quaternary ammonium salt and the fluorocarbon surfactant, a dense, uniform and stable passive film can form on a surface of each of a positive electrode film and a negative electrode film of the electrochemical energy storage device, and infiltration capability of the electrolyte on each of the passive film of the positive electrode film and the negative electrode film can be increased at the same time, so as to decrease electrode polarization inside the electrochemical energy storage device and make the electrochemical energy storage device have excellent rate capability, low temperature discharge performance and high temperature storage performance.

公开(公告)号：US20190036161A1

公开(公告)日：2019-01-31

申请号：US16027000

申请日：2018-07-03

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xiaomei WANG ,  Bin Jiang ,  Chenghua Fu ,  Jiqiong Liu ,  Yan Zhou ,  Jianwei Zhu ,  Changlong Han ,  Wenhao Liu

IPC: H01M10/0565 ,  H01M10/0525 ,  H01M10/0569 ,  H01M10/0567 ,  H01M4/583 ,  H01M4/505 ,  H01M4/525 ,  H01M10/058 ,  H01M10/44

Abstract: The present disclosure provides an electrolyte and an electrochemical energy storage device. The electrolyte comprises an electrolyte salt and an additive. The additive comprises a sulfonic ester cyclic quaternary ammonium salt and a fluorocarbon surfactant. Under the combined effect of the sulfonic ester cyclic quaternary ammonium salt and the fluorocarbon surfactant, a dense, uniform and stable passive film can form on a surface of each of a positive electrode film and a negative electrode film of the electrochemical energy storage device, and infiltration capability of the electrolyte on each of the passive film of the positive electrode film and the negative electrode film can be increased at the same time, so as to decrease electrode polarization inside the electrochemical energy storage device and make the electrochemical energy storage device have excellent rate capability, low temperature discharge performance and high temperature storage performance.

公开(公告)号：US20180351209A1

公开(公告)日：2018-12-06

申请号：US15981716

申请日：2018-05-16

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Yingjie ZHAN ,  Jian Yan ,  Songjun Shi ,  Lan Xie ,  Wenhao Liu

IPC: H01M10/0567 ,  H01M10/0525 ,  H01M10/0568 ,  H01M10/0569 ,  H01M4/36 ,  H01M4/525 ,  H01M4/505

CPC classification number: H01M10/0567 ,  H01M4/366 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  H01M10/0568 ,  H01M10/0569 ,  H01M2004/028 ,  H01M2300/004

Abstract: The present disclosure provides a lithium-ion battery, which comprises: a positive electrode plate containing a positive electrode active material, a negative electrode plate containing a negative electrode active material and an electrolyte. The positive electrode active material comprises: a core and a coating layer coating a surface of the core and comprising boron. The electrolyte comprises a lithium salt, a non-aqueous organic solvent and an electrolyte additive, the electrolyte additive comprises an organic titanium compound. The coating layer of the positive electrode active material of the lithium-ion battery according to the present disclosure contains boron, and the electrolyte of the lithium-ion battery contains the organic titanium compound, under the combined effect of the coating layer containing boron and the electrolyte containing the organic titanium compound, the lithium-ion battery has excellent high temperature cycle performance and excellent high temperature storage performance.

公开(公告)号：US20240372145A1

公开(公告)日：2024-11-07

申请号：US18773617

申请日：2024-07-16

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Huiling Chen ,  Zeli Wu ,  Changlong Han ,  Jie Guo ,  Lei Huang ,  Cuiping Zhang ,  Wenhao Liu

IPC: H01M10/0567 ,  H01M4/02 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0569

Abstract: The present application provides a secondary battery, a battery module, a battery pack, and an electrical device. The secondary battery includes a positive electrode plate, a negative electrode plate comprising a negative electrode active material; and an electrolytic solution including a first additive and a carbonate solvent, and the first additive including a boron-containing lithium salt and an ester additive, which are configured to form a solid electrolyte interface film on the surface of the negative electrode active material, wherein a discharge capacity of the secondary battery is denoted as B1 in Ah, a change in amount of gas production of the secondary battery is denoted as B2 in mL, a mass of the electrolytic solution is denoted as C in g, a reduction potential of the first additive relative to lithium metal is denoted as D.

公开(公告)号：US20240079651A1

公开(公告)日：2024-03-07

申请号：US18503190

申请日：2023-11-07

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Zeli Wu ,  Bin Jiang ,  Changlong Han ,  Huiling Chen ,  Lei Huang ,  Cuiping Zhang ,  Jie Guo ,  Wenhao Liu

IPC: H01M10/0567 ,  H01M10/052 ,  H01M10/0568 ,  H01M10/0569

CPC classification number: H01M10/0567 ,  H01M10/052 ,  H01M10/0568 ,  H01M10/0569 ,  H01M2004/027

Abstract: Provided are a non-aqueous electrolyte and a preparation method thereof, and a secondary battery and an electric apparatus containing the same. The non-aqueous electrolyte contains a non-aqueous solvent and lithium ions, first cations, and first anions dissolved therein, where the first cation is a metal cation Men+ other than the lithium ion, n representing a chemical valence of the metal cation; the first anion is a difluoroxalate borate anion DFOB−; mass concentration of the first cations in the non-aqueous electrolyte is D1 ppm, and mass concentration of the first anions in the non-aqueous electrolyte is D2 ppm, both based on total mass of the non-aqueous electrolyte; and the non-aqueous electrolyte satisfies that D1 is 0.5 to 870 and that D1/D2 is 0.02 to 2. The non-aqueous electrolyte in this application enables the secondary battery to have good cycling performance, safety performance, and kinetic performance.

公开(公告)号：US10826122B2

公开(公告)日：2020-11-03

申请号：US15981716

申请日：2018-05-16

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Yingjie Zhan ,  Jian Yan ,  Songjun Shi ,  Lan Xie ,  Wenhao Liu

IPC: H01M10/0567 ,  H01M10/0525 ,  H01M10/0568 ,  H01M10/0569 ,  H01M4/36 ,  H01M4/505 ,  H01M4/525 ,  H01M4/02

Abstract: The present disclosure provides a lithium-ion battery, which comprises: a positive electrode plate containing a positive electrode active material, a negative electrode plate containing a negative electrode active material and an electrolyte. The positive electrode active material comprises: a core and a coating layer coating a surface of the core and comprising boron. The electrolyte comprises a lithium salt, a non-aqueous organic solvent and an electrolyte additive, the electrolyte additive comprises an organic titanium compound. The coating layer of the positive electrode active material of the lithium-ion battery according to the present disclosure contains boron, and the electrolyte of the lithium-ion battery contains the organic titanium compound, under the combined effect of the coating layer containing boron and the electrolyte containing the organic titanium compound, the lithium-ion battery has excellent high temperature cycle performance and excellent high temperature storage performance.