公开(公告)号：US20220246903A1

公开(公告)日：2022-08-04

申请号：US17723531

申请日：2022-04-19

Applicant: Contemporary Amperex Technology Co.,Limited

Inventor： Shiwen WANG ,  Qisen HUANG ,  Huafeng HUANG ,  Chengdu LIANG

IPC: H01M4/131 ,  H01M4/04 ,  H01M4/1391 ,  H01M4/505 ,  H01M4/525 ,  H01M4/58 ,  H01M4/1397 ,  H01M4/136 ,  H01M50/46 ,  H01M10/0525

Abstract: The present disclosure relates to the technical field of energy storage, and in particular, relates to a positive electrode, a method for preparing the positive electrode and an electrochemical device. The positive electrode includes a current collector and a positive electrode active material layer that contains positive electrode active material and is arranged on at least one surface of the current collector. An inorganic layer having a thickness of 20 nm to 2000 nm is arranged on the surface of the at least one positive electrode active material layer away from the current collector. The inorganic layer is a porous dielectric layer containing no binder, and the inorganic layer has a porosity of 10%˜60%. The positive electrode active material layer according to the present disclosure significantly improves the cycle performance, high-temperature storage performance and safety of the electrochemical device.

公开(公告)号：US20220140318A1

公开(公告)日：2022-05-05

申请号：US16973152

申请日：2020-07-14

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Chengdu LIANG ,  Yuzhen ZHAO ,  Yingjie GUAN ,  Yan WEN ,  Qisen HUANG

IPC: H01M4/36 ,  H01M4/48 ,  H01M4/62

Abstract: The present application discloses a negative active material, preparation process thereof and a secondary battery and the related battery module, battery pack and device. The negative active material comprises a core structure and a modified polymer coating layer coated on at least a part of the outer surface of the core structure, wherein the core structure comprises one or more of silicon-based materials and tin based materials; and wherein the negative active material has an infrared spectrum comprising an infrared absorption peak at the wavelength of 1450 cm−1 to 1690 cm−1, and the infrared absorption peak has a transmittance T that satisfies 80%≤T≤99%.

公开(公告)号：US20200006756A1

公开(公告)日：2020-01-02

申请号：US16452543

申请日：2019-06-26

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Huafeng HUANG ,  Changliang SHENG ,  Cheng LI ,  Qisen HUANG

IPC: H01M4/1393 ,  H01M10/0525 ,  H01M4/131 ,  H01M4/133 ,  H01M4/134 ,  H01M4/1391 ,  H01M4/64

Abstract: The invention refers to negative electrode plate, preparation method thereof and electrochemical device. The negative electrode plate comprises: a negative current collector, a negative active material layer, and an inorganic dielectric layer which are provided in a stacked manner; the negative active material layer comprises opposite first surface and second surface, wherein the first surface is disposed away from the negative current collector; the inorganic dielectric layer is disposed on the first surface of the negative active material layer. The negative electrode plate provided by the application is useful in an electrochemical device, and can result in an electrochemical device having simultaneously excellent safety performance and cycle performance.

公开(公告)号：US20190341622A1

公开(公告)日：2019-11-07

申请号：US16514428

申请日：2019-07-17

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Chengdu LIANG ,  Huafeng HUANG ,  Qisen HUANG

IPC: H01M4/66

Abstract: A battery is provided in the present disclosure. The battery includes: a positive electrode plate including a positive current collector and a positive active material layer; a negative electrode plate including a positive current collector and a negative active material layer; and an electrolyte. The positive current collector includes an insulation layer used to support a conductive layer and the conductive layer used to support the positive active material layer and located above at least one surface of the insulation layer. The conductive layer has a thickness of D2 which satisfies: 300 nm≤D2≤2 μm. A protective layer is arranged on at least one surface of the conductive layer. The negative current collector is a copper foil current collector having a thickness of 1 μm to 5.9 μm.

公开(公告)号：US20190207202A1

公开(公告)日：2019-07-04

申请号：US16235625

申请日：2018-12-28

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Shiwen WANG ,  Qisen HUANG ,  Huafeng HUANG ,  Chengdu LIANG

IPC: H01M4/131 ,  H01M4/1391 ,  H01M4/525 ,  H01M4/505 ,  H01M10/0525 ,  H01M4/04

CPC classification number: H01M4/131 ,  H01M2/1673 ,  H01M4/0421 ,  H01M4/0423 ,  H01M4/0426 ,  H01M4/0428 ,  H01M4/136 ,  H01M4/1391 ,  H01M4/1397 ,  H01M4/505 ,  H01M4/525 ,  H01M4/5825 ,  H01M10/052 ,  H01M2004/021

Abstract: The present disclosure relates to the technical field of energy storage, and in particular, relates to a positive electrode, a method for preparing the positive electrode and an electrochemical device. The positive electrode includes a current collector and a positive electrode active material layer that contains positive electrode active material and is arranged on at least one surface of the current collector. An inorganic layer having a thickness of 20 nm to 2000 nm is arranged on the surface of the at least one positive electrode active material layer away from the current collector. The inorganic layer is a porous dielectric layer containing no binder, and the inorganic layer has a porosity of 10%˜60%. The positive electrode active material layer according to the present disclosure significantly improves the cycle performance, high-temperature storage performance and safety of the electrochemical device.

公开(公告)号：US20190207191A1

公开(公告)日：2019-07-04

申请号：US16211526

申请日：2018-12-06

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Huafeng HUANG ,  Qisen HUANG ,  Shiwen WANG ,  Chengdu LIANG

IPC: H01M2/16 ,  H01M2/14 ,  C23C14/00 ,  C23C14/08 ,  C23C14/28 ,  C23C14/02 ,  H01M10/0525

Abstract: A separator, a method for preparing the separator, and an electrochemical device containing the separator. The separator includes a substrate and an inorganic layer disposed on at least one side of the substrate. The substrate is a porous substrate. The inorganic layer is a dielectric layer containing no binder. The inorganic layer has a thickness of 20 nm to 2000 nm. A mass of the inorganic layer is M1, a mass of the substrate is M2, and M1/M2 is greater than or equal to 0.05 but smaller than or equal to 7.5. An interfacial peeling force between the inorganic layer and the substrate is not smaller than 30 N/m. The interfacial wettability and thermal shrinkage resistance performance of the separator are effectively improved while the separator has a certain mechanical strength. The separator can have favorable mechanical strength and thermal shrinkage percentage and high energy density.

公开(公告)号：US20190173093A1

公开(公告)日：2019-06-06

申请号：US16209377

申请日：2018-12-04

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Chengdu LIANG ,  Huafeng HUANG ,  Zuyu WU ,  Qisen HUANG

IPC: H01M4/66 ,  H01M10/0525

CPC classification number: H01M4/667 ,  H01M4/0404 ,  H01M4/661 ,  H01M4/662 ,  H01M4/663 ,  H01M4/664 ,  H01M4/668 ,  H01M10/052 ,  H01M10/0525 ,  H01M2004/028

Abstract: The present disclosure provides a current collector, an electrode plate and a battery. The current collector includes an insulation layer and at least one conductive layer located on at least one surface of the insulation layer. The insulation layer is used to support the conductive layer, and the conductive layer is used to support an electrode active material layer. The conductive layer has a thickness of D2, and 300 nmD22 μm. The current collector further includes a protective layer provided on a surface of the conductive layer facing towards the insulation layer. The current collector according to the present disclosure can increase a short-circuit resistance in case of short circuit caused by the battery being abnormal, thereby resulting in protective effect on the conductive layer, and can also increase the bonding force between the insulation layer and the conductive layer, thereby increasing mechanical strength of the current collector.

公开(公告)号：US20240113288A1

公开(公告)日：2024-04-04

申请号：US18523929

申请日：2023-11-30

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Cheng LI ,  Qisen HUANG ,  Xin LIU ,  Changliang SHENG ,  Shiwen WANG ,  Xianghui LIU ,  Jia PENG ,  Mingling LI ,  Chengdu LIANG

IPC: H01M4/38 ,  H01M4/04 ,  H01M4/583 ,  H01M4/66

CPC classification number: H01M4/382 ,  H01M4/0404 ,  H01M4/0421 ,  H01M4/583 ,  H01M4/663 ,  H01M4/667 ,  H01M4/668 ,  H01M2004/027

Abstract: This application relates to a negative electrode plate, a secondary battery and apparatus thereof. The secondary battery of the present application comprises a negative electrode plate, the negative electrode plate comprises a composite current collector and a negative electrode active material layer disposed on at least one surface of the composite current collector, the negative electrode active material layer comprises a silicon-based active material, the silicon-based active material accounts for 0.5 wt % to 50 wt % of total mass of the negative electrode active material layer, and the composite current collector comprises a polymer support layer and a metal conductive layer disposed on at least one surface of the polymer support layer. The secondary battery and the negative electrode plate achieve good coordination between the current collector and the negative electrode active material layer.

公开(公告)号：US20240102182A1

公开(公告)日：2024-03-28

申请号：US18536934

申请日：2023-12-12

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED ,  CATL-SICONG NOVEL MATERIALS CO., LTD

Inventor： Sicong CHENG ,  Qisen HUANG

IPC: C25B1/245 ,  C25B15/025

CPC classification number: C25B1/245 ,  C25B15/025

Abstract: A method for preparing sulfuryl fluoride by electrofluorination is described. The method for preparing sulfuryl fluoride by electrofluorination comprises a step of subjecting sulfur dioxide and a hydrogen fluoride complex to an electrofluorination reaction in an electrolytic cell. By means of this, the production cost of sulfuryl fluoride can be reduced, and the purity and yield of sulfuryl fluoride can be improved, thus making it suitable for industrial production.

公开(公告)号：US20230387468A1

公开(公告)日：2023-11-30

申请号：US18446441

申请日：2023-08-08

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED ,  CATL-SICONG NOVEL MATERIALS CO., LTD

Inventor： Sicong CHENG ,  Qisen HUANG

IPC: H01M10/0568 ,  H01M10/0525

CPC classification number: H01M10/0568 ,  H01M10/0525

Abstract: A method for preparing lithium bis(fluorosulfonyl)imide includes a synthesis step, an evaporation step, an extraction step, an alkalinization step, a dehydration step, and a desolventization step.