公开(公告)号：US20220153598A1

公开(公告)日：2022-05-19

申请号：US17586725

申请日：2022-01-27

Applicant: Contemporary Amperex Technology Co., Limited

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

IPC: C01B33/18 ,  C09C1/30

Abstract: This application belongs to the field of energy storage technology, and specifically discloses a negative active material including SiOx particles and a modified polymer coating layer covering the SiOx particles, in which 0

公开(公告)号：US20220140328A1

公开(公告)日：2022-05-05

申请号：US17059423

申请日：2020-07-22

Applicant: Contemporary Amperex Technology Co., Limited

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

IPC: H01M4/485 ,  H01M4/62

Abstract: The present application provide a silicon-oxygen compound, a secondary battery using it, and related battery modules, battery packs, and devices. The silicon-oxygen compound provided by the present application has a formula of SiOx, in which x satisfies 0

公开(公告)号：US20220140325A1

公开(公告)日：2022-05-05

申请号：US17553839

申请日：2021-12-17

Applicant: Contemporary Amperex Technology Co., Limited

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

IPC: H01M4/38 ,  H01M4/04

Abstract: The present application provides a negative electrode active material, a process for preparing the same, and a secondary battery, a battery module, a battery pack and an apparatus related the same. The negative electrode active material comprises a core material and a polymer-modified coating layer on at least a part of a surface of the core material, the core material is one or more of a silicon-based negative electrode material and a tin-based negative electrode material, the polymer-modified coating layer comprises sulfur element and carbon element, the sulfur element has a mass percentage of from 0.2% to 4% in the negative electrode active material, the carbon element has a mass percentage of from 0.5% to 4% in the negative electrode active material, and the polymer-modified coating layer comprises a —S—C— bond.

公开(公告)号：US20220123314A1

公开(公告)日：2022-04-21

申请号：US17563071

申请日：2021-12-28

Applicant: Contemporary Amperex Technology Co., Limited

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

IPC: H01M4/62 ,  H01M4/36 ,  H01M4/04 ,  H01M10/0525

Abstract: The present application provides a negative electrode active material, a process, a battery, a battery module, a battery pack and an apparatus related to the same. The negative electrode active material comprises a core material and a polymer modified coating on at least a part of a surface of core material; wherein the core material is one or more of a silicon-based negative electrode material and a tin-based negative electrode material; the negative electrode active material has a weight loss rate satisfying 0.2%≤weight loss rate≤2% in a thermogravimetric analysis test wherein temperature is elevated from 25° C. to 800° C. under a non-oxidizing inert gas atmosphere. The present application can reduce damage to the surface structure of the negative electrode active material, reduce loss of active ions and capacity, meanwhile can well improve coulomb efficiency and cycle performance of the battery.

公开(公告)号：US20220002160A1

公开(公告)日：2022-01-06

申请号：US17475365

申请日：2021-09-15

Applicant: Contemporary Amperex Technology Co., Limited

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

IPC: C01B32/205 ,  H01M10/0525

Abstract: The present application discloses a composite graphite material and a method for preparing the same, a secondary battery, and an apparatus. The composite graphite material includes a core material and a coating layer that coats at least a portion of the surface of the core material, the core material including graphite, and the coating layer including a coating material containing a cyclic structure moiety, wherein the composite graphite material has a weight-loss rate of from 0.1% to 0.55% when the composite graphite material is heated in an atmosphere of an inert non-oxidative gas at a temperature rising from 40° C. to 800° C. The composite graphite material can enhance the gram capability and reduce the expansion rate of an electrode plate, and more preferably, can improve the cycle performance and kinetic performance of a battery as well.