公开(公告)号：US20230307638A1

公开(公告)日：2023-09-28

申请号：US18075636

申请日：2022-12-06

Applicant: Ningde Amperex Technology Limited

Inventor： Pengyang FENG ,  Jiali DONG ,  Jia TANG ,  Yuansen XIE

IPC: H01M4/583 ,  H01M4/36 ,  H01M4/62 ,  H01M4/66

CPC classification number: H01M4/583 ,  H01M4/366 ,  H01M4/623 ,  H01M4/663 ,  H01M4/667

Abstract: An anode material having 0.8≤0.06×(Dv50)2−2.5×Dv50+Dv99≤12 (1); and 1.2≤0.2×Dv50−0.006×(Dv50)2+BET≤5 (2), where Dv50 represents a value in the volume-based particle size distribution of the anode material that is greater than the particle size of 50% of the particles, Dv99 represents a value in the volume-based particle size distribution of the anode material that is greater than the particle size of 99% of the particles, and BET is a specific surface area of the anode material, wherein Dv50 and Dv99 are expressed in μm and BET is expressed in m2/g. The anode material is capable of significantly improving the rate performance of electrochemical devices.

公开(公告)号：US20230223538A1

公开(公告)日：2023-07-13

申请号：US18188686

申请日：2023-03-23

Applicant: Ningde Amperex Technology Limited

Inventor： Shuo WANG ,  Jiali DONG ,  Jia TANG ,  Yuansen XIE

IPC: H01M4/587 ,  H01M4/133 ,  H01M10/0525

CPC classification number: H01M4/587 ,  H01M4/133 ,  H01M10/0525 ,  H01M2004/027

Abstract: A negative active material having a surface mean diameter of the negative active material satisfying: lg(SMD−2)+lg(SMD+2)≥0.4. SMD is a value of the surface mean diameter of the negative active material measured in μm, and falls within a range of 10 to 16; and lg is a frequency. The negative active material enables the electrochemical device to achieve a trade-off between a high energy density and a low degree of lithium plating.

公开(公告)号：US20230100932A1

公开(公告)日：2023-03-30

申请号：US18073884

申请日：2022-12-02

Applicant: Ningde Amperex Technology Limited

Inventor： Lihong HE ,  Jia TANG ,  Jiali DONG ,  Yuansen XIE

IPC: H01M4/587 ,  C01B32/20

Abstract: A negative active material includes a carbon material. The carbon material satisfies the following relationship: 6

公开(公告)号：US20230052908A1

公开(公告)日：2023-02-16

申请号：US17971811

申请日：2022-10-24

Applicant: Ningde Amperex Technology Limited

Inventor： Wenbo JIN ,  Jiali DONG ,  Lihong HE ,  Yuansen XIE

IPC: H01M4/583 ,  H01M4/04

Abstract: A negative electrode active material includes a carbon material, where the carbon material has a specific degree of graphitization and aspect ratio distribution. A degree of graphitization Gr of the carbon material measured by an X-ray diffraction analysis method is 0.82 to 0.92, and based on a total quantity of particles of the carbon material, a proportion of particles with an aspect ratio greater than 3.3 in the carbon material is less than 10%. The negative electrode active material helps to improve cycle performance of the electrochemical apparatus. FIG. 1.

公开(公告)号：US20230026799A1

公开(公告)日：2023-01-26

申请号：US17947751

申请日：2022-09-19

Applicant: Ningde Amperex Technology Limited

Inventor： Pengyang FENG ,  Yuxin CAI ,  Jiali DONG ,  Yuansen XIE

IPC: H01M4/587 ,  H01M4/62

Abstract: An anode active material, and an electrochemical device and electronic device using such anode active material. Also, an anode active material, including graphite. Controlling a graphitization degree of particles of different particle sizes of the anode active material can achieve a balance between kinetic performance and first cycle efficiency of the electrochemical device.

公开(公告)号：US20220320484A1

公开(公告)日：2022-10-06

申请号：US17708300

申请日：2022-03-30

Applicant: Ningde Amperex Technology Limited

Inventor： Maohua CHEN ,  Daguang LI ,  Xiaoping LIN ,  Yuansen XIE

IPC: H01M4/134 ,  H01M10/052 ,  H01M4/36 ,  H01M4/62

Abstract: An electrochemical device includes a negative electrode. The negative electrode includes a current collector layer, a lithium metal layer, and a porous framework layer that are arranged in sequence. The porous framework layer is partly intercalated in the lithium metal layer. A thickness by which the porous framework layer is intercalated in the lithium metal layer is 0.2 μm to 50 μm. The electrochemical device achieves excellent cycle performance and relatively high safety and reliability.

公开(公告)号：US20220199996A1

公开(公告)日：2022-06-23

申请号：US17690252

申请日：2022-03-09

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Qunchao LIAO ,  Hang CUI ,  Yuansen XIE ,  Chao WANG

IPC: H01M4/587 ,  H01M4/38 ,  H01M4/04 ,  H01M4/36 ,  H01M10/0525 ,  H01M4/1395 ,  H01M4/1393 ,  H01M4/66

Abstract: A negative electrode material includes a silicon-based material and a carbon material. Peaks with a shift range of 1255˜1355 cm−1 and 1575˜1600 cm−1 in a Raman spectrum of the carbon material are a D peak and a G peak respectively. Peaks with a shift range of 1255˜1355 cm−1 and 1575˜1600 cm−1 in a Raman spectrum of the silicon-based material are the D peak and the G peak respectively. A scattering peak intensity ratio of D versus G peaks of the carbon material is A, and a scattering peak intensity ratio of D versus G peaks of the silicon-based material is B. 0.15≤A≤0.9, 0.8≤B≤2.0, and 0.2

公开(公告)号：US20220199988A1

公开(公告)日：2022-06-23

申请号：US17690264

申请日：2022-03-09

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Zhihuan CHEN ,  Daoyi JIANG ,  Hang CUI ,  Yuansen XIE

IPC: H01M4/38 ,  H01M4/134 ,  H01M4/36 ,  H01M4/62 ,  H01M10/0525 ,  H01M4/1395

Abstract: An anode material includes silicon-containing particles including a silicon composite substrate and a polymer layer, the polymer layer coats at least a portion of the silicon composite substrate, wherein the polymer layer includes a carbon material. The anode material has good cycle performance, and the battery prepared with the anode material has better rate performance and lower expansion rate.

公开(公告)号：US20210391567A1

公开(公告)日：2021-12-16

申请号：US17460736

申请日：2021-08-30

Applicant: Ningde Amperex Technology Limited

Inventor： Qunchao LIAO ,  Hang CUI ,  Yuansen XIE

IPC: H01M4/36 ,  H01M4/38 ,  H01M4/587 ,  H01M4/48 ,  H01M10/0525

Abstract: A negative electrode includes silicon-based particles and graphite particles, where a quantity of graphite particles present within a vertical distance of about 0 to 6 μm to respective edges of the silicon-based particles is N, and based on a total quantity of the silicon-based particles, more than about 50% of the silicon-based particles satisfy: 6≤N≤17. The negative electrode has good cycle performance, and a battery prepared by using the negative electrode has good rate performance and a low deformation rate.

公开(公告)号：US20200266428A1

公开(公告)日：2020-08-20

申请号：US16393182

申请日：2019-04-24

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Daoyi JIANG ,  Zhihuan CHEN ,  Hang CUI ,  Yuansen XIE

IPC: H01M4/36 ,  H01M4/131 ,  H01M4/133 ,  H01M4/38 ,  H01M4/62 ,  H01M10/0525 ,  H01M10/0569

Abstract: The present application relates to an anode active material and an anode, an electrochemical device and an electronic device using the same. Specifically, the present application provides an anode active material, including a lithiated silicon-oxygen material and a coating layer, where the coating layer and the lithiated silicon-oxygen material at least have one or more structural units selected from formulae CF2a, CHFb and CH2c therebetween, where a, b, and c are integers greater than or equal to 6. The anode active material of the present application has high stability and is suitable for being subjected to aqueous processing to obtain the anode.