公开(公告)号：US20190341649A1

公开(公告)日：2019-11-07

申请号：US16177074

申请日：2018-10-31

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Pengwei CHEN ,  Meng WANG ,  Leimin XU ,  Liang WANG

IPC: H01M10/0525 ,  H01M4/131 ,  H01M4/40

Abstract: The present disclosure provides a cathode material, a method for preparing the same, a cathode and lithium ion battery having the same. The cathode material includes an active component; and a sodium salt dispersed in the active component.

公开(公告)号：US20220216481A1

公开(公告)日：2022-07-07

申请号：US17700909

申请日：2022-03-22

Applicant: Ningde Amperex Technology Limited

Inventor： Fei ZHANG ,  Kai WANG ,  Leimin XU ,  Meng WANG

IPC: H01M4/62 ,  H01M4/131 ,  H01M4/525 ,  H01M4/505 ,  H01M10/0525

Abstract: A positive electrode material, an electrochemical device that uses same, and an electronic device. Specifically, a positive is a layered structure. The layered structure includes a strip-like structure containing an atom cluster. The positive electrode material according to this application helps to improve cycle performance and storage performance of the electrochemical device under a high voltage working condition.

公开(公告)号：US20210234154A1

公开(公告)日：2021-07-29

申请号：US16652405

申请日：2020-03-17

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Kai WANG ,  Tao LI ,  Meng WANG ,  Pengwei CHEN

IPC: H01M4/36 ,  H01M4/525 ,  H01M4/52 ,  H01M10/0525

Abstract: The present application relates to a cathode material and an electrochemical device comprising the same. In particular, the present application relates to a cathode material having a surface heterophasic structure, wherein the cathode material includes a lithium cobalt oxide and an oxide of cobalt, wherein a Raman spectrum of the cathode material has characteristic peaks in the range of about 470 cm−1 to about 530 cm −1, about 560 cm−1 to about 630 cm −1 and about 650 cm −1 to about 750 cm−1, and wherein the surface heterophasic structure of the cathode material includes the lithium cobalt oxide and the oxide of cobalt. The electrochemical device using the cathode material having a surface heterophasic structure of the present application can exhibit excellent cycle performance and thermal stability.

公开(公告)号：US20200227742A1

公开(公告)日：2020-07-16

申请号：US16294721

申请日：2019-03-06

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Pengwei CHEN ,  Meng WANG ,  Leimin XU ,  Liang WANG

IPC: H01M4/525 ,  H01M10/0525 ,  H01M4/36 ,  H01M4/48

Abstract: The present application relates to a precursor of lithium cobalt oxide and preparation method thereof and a composite of lithium cobalt oxide prepared from the precursor of the lithium cobalt oxide. Specifically, the present application relates to the precursor of lithium cobalt oxide having a surface coating structure obtained by performing surface coating on the precursor of the lithium cobalt oxide with a metal oxide, and synthesizing a cathode material of the composite of the lithium cobalt oxide used by an electrochemical device using such precursor. The cathode material of the composite of the lithium cobalt oxide synthesized by such a precursor and the electrochemical device containing such cathode material have better structural stability, better cycle stability and better storage and safety performances during high voltage.

公开(公告)号：US20200227741A1

公开(公告)日：2020-07-16

申请号：US16294398

申请日：2019-03-06

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Liang WANG ,  Meng WANG ,  Leimin XU ,  Pengwei CHEN

IPC: H01M4/525 ,  H01M10/0525 ,  H01M4/04 ,  C01G51/00

Abstract: The present application relates to a cathode material and an electrochemical device including the cathode material. The cathode material includes a substrate and a coating layer, wherein the substrate is a cathode active substance containing a cobalt element and capable of intercalating and deintercalating lithium ions, and the coating layer is located on the surface of the substrate, wherein the coating layer is LaxLiyCozOa, wherein 1≤x≤2, 0

公开(公告)号：US20200035991A1

公开(公告)日：2020-01-30

申请号：US16217416

申请日：2018-12-12

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Meng WANG ,  Leimin XU ,  Liang WANG ,  Pengwei CHEN

IPC: H01M4/131 ,  H01M4/485 ,  H01M4/1391 ,  H01M10/0525

Abstract: This application relates to a metal oxide and a method for preparing the same. Specifically, Co3O4 is selected as a precursor of lithium cobalt oxide, and one or more metal elements M are doped in the particles of Co3O4 to obtain a doped lithium cobalt oxide precursor Co3−xMxO4, where 0

公开(公告)号：US20210257619A1

公开(公告)日：2021-08-19

申请号：US16981545

申请日：2020-02-19

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Pengwei CHEN ,  Meng WANG ,  Leimin XU ,  Liang WANG

IPC: H01M4/58 ,  H01M4/505 ,  H01M4/525 ,  H01M4/62

Abstract: A cathode includes a current collector, a first material layer and a second material layer. The first material layer includes a first material. The second material layer includes a second material. The second material includes at least one of the followings compounds: phosphate represented by a general formula M1PO4 and lithium titanium phosphate represented by a general formula Li3Ti2-x M2x(PO4)3, and the second material layer is disposed between the current collector and the first material layer. The cathode of the present application is provided with a double-layer structure including at least one of phosphate and lithium titanium phosphate to avoid direct contact between the current collector in the cathode and an anode material layer and optimize the stability of the first material layer, so that the cycle performance, electrochemical stability and safety performance of the electrochemical device are significantly improved.

公开(公告)号：US20190393501A1

公开(公告)日：2019-12-26

申请号：US16176702

申请日：2018-10-31

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Pengwei CHEN ,  Meng WANG ,  Leimin XU ,  Liang WANG

IPC: H01M4/525 ,  H01M10/0525

Abstract: The present application relates to a metal oxide and synthesis of a lithium ion battery. Specifically, the present application selects a cobalt oxide compound, which uses Co3O4 as a main body, as a precursor of lithium cobalt oxide, and anion doping is performed in particles of Co3O4 to obtain a doped precursor for lithium cobalt oxide. The general formula of the precursor can be expressed as Co3(O1-yMy)4, where about 0

公开(公告)号：US20200185715A1

公开(公告)日：2020-06-11

申请号：US16429999

申请日：2019-06-03

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Fei ZHANG ,  Leimin XU ,  Meng WANG ,  Pengwei CHEN

IPC: H01M4/525 ,  H01M10/0525 ,  H01M4/505 ,  H01M4/04 ,  C01G53/00

Abstract: The present application relates to a cathode material and an electrochemical device comprising the same. The cathode material comprises a matrix and a coating layer. The matrix comprises a cathode active material capable of reversibly intercalating or deintercalating lithium ions, and the coating layer comprises an organic material having a general formula X—R—CnFaClb, wherein R is a hydrocarbyl and X is a siloxane group. The coating layer can not only reduce the side reaction between the electrolyte and the cathode active material in the electrochemical device, but can also act as a lithium ion conductor layer to accelerate the intercalating or deintercalating of the lithium ions. Therefore, the cathode material coated by the above coating layer has excellent rate performance and impedance characteristics while having excellent cycle stability.

公开(公告)号：US20220123291A1

公开(公告)日：2022-04-21

申请号：US17281046

申请日：2020-03-31

Applicant: Ningde Amperex Technology Limited

Inventor： Kai WANG ,  Fei ZHANG ,  Meng WANG ,  Leimin XU

IPC: H01M4/505 ,  H01M4/525 ,  H01M10/0525

Abstract: A positive electrode material includes a lithium composite oxide, and the positive electrode material comprises stress relief particles. There are cavities inside the stress relief particles, and the cavities are closed structures. The positive electrode material that includes the stress relief particles can be used to effectively tackle a stress and relieve the stress in advance, relieve a strain of the positive electrode material used at a high voltage, avoid ruptures of particles of the positive electrode material, and enhance structural stability of the positive electrode material. The positive electrode material and the electrochemical device having the positive electrode material achieve good high-voltage cycle performance and cycle stability.