公开(公告)号：US10886565B2

公开(公告)日：2021-01-05

申请号：US16026990

申请日：2018-07-03

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xiaomei Wang ,  Chenghua Fu ,  Changlong Han

IPC: H01M10/0567 ,  H01M10/0568 ,  H01G11/62 ,  H01G11/64 ,  C07D207/06 ,  C07F9/6574 ,  C07D307/64 ,  C07D213/71 ,  C07D295/15 ,  C07F5/04 ,  C07D295/24 ,  H01M10/052 ,  H01G11/56 ,  H01M10/0525

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 multinitrile compound. The sulfonic ester cyclic quaternary ammonium salt and the multinitrile compound can form a dense and uniform passive film with high ionic conductivity on a surface of each of the positive electrode film and the negative electrode film, so as to prevent continuous oxidation and reduction reaction from occurring between the electrolyte and the positive electrode film and the negative electrode film and make the electrochemical energy storage device has excellent high temperature cycle performance and high temperature storage performance.

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：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.

公开(公告)号：US20190036168A1

公开(公告)日：2019-01-31

申请号：US16026990

申请日：2018-07-03

Applicant: Contemporary Amperex Technology Co, Limited

Inventor： Xiaomei WANG ,  Chenghua Fu ,  Changlong Han

IPC: H01M10/0567 ,  H01M10/0568 ,  H01G11/62 ,  H01G11/64 ,  C07D207/06 ,  C07D295/24 ,  C07D307/64 ,  C07D213/71 ,  C07D295/15 ,  C07F9/6574 ,  C07F5/04

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 multinitrile compound. The sulfonic ester cyclic quaternary ammonium salt and the multinitrile compound can form a dense and uniform passive film with high ionic conductivity on a surface of each of the positive electrode film and the negative electrode film, so as to prevent continuous oxidation and reduction reaction from occurring between the electrolyte and the positive electrode film and the negative electrode film and make the electrochemical energy storage device has excellent high temperature cycle 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：US20190006704A1

公开(公告)日：2019-01-03

申请号：US16000775

申请日：2018-06-05

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Feng Ju ,  Changlong Han ,  Shaojie Tian ,  Cui Zhang ,  Chenghua Fu

IPC: H01M10/0525 ,  H01M4/525 ,  H01M4/1391 ,  H01M10/0567 ,  H01M10/0569 ,  H01M2/14

Abstract: The present disclosure provides an electrolyte and a lithium-ion battery, the electrolyte comprises an electrolyte salt, an organic solvent and an additive. The organic solvent comprises ethylene carbonate, dimethyl carbonate and ethyl methyl carbonate. The additive comprises a boron-based or phosphorus-based lithium oxalate, a fluorinated lithium phosphate and one or two selected from a group consisting of vinylene carbonate and fluoroethylene carbonate. The electrolyte of the present disclosure can improve the cycle performances under both room temperature fast charging and high temperature fast charging, the power performances under both room temperature and low temperature and the storage performance under high temperature of the lithium-ion battery at the same time.