公开(公告)号：US11081686B2

公开(公告)日：2021-08-03

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 ,  H01M4/1391 ,  H01M4/485 ,  H01M10/0525 ,  H01M4/02

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：US20190051893A1

公开(公告)日：2019-02-14

申请号：US16057810

申请日：2018-08-07

Applicant: Ningde Amperex Technology Limited

Inventor： Fei Zhang ,  Meng Wang ,  Leimin Xu ,  Qunfeng Wang

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

CPC classification number: H01M4/366 ,  H01M4/131 ,  H01M4/483 ,  H01M4/505 ,  H01M4/525 ,  H01M4/62 ,  H01M10/0525 ,  H01M2004/028

Abstract: The examples of the present application provide a positive electrode material and a lithium-ion battery. The positive electrode material comprises: a substrate material; and a coating material formed on at least one part of a surface of the substrate material; the general formula of the substrate material being LixCoyM1-yO2, wherein 1.0≤x≤1.2, 0.8≤y≤1.0 and M is at least one selected from the group consisting of Mg, Ti, Al, Zr, Ni, Mn; the coating material includes Y2O3 and at least two selected from the group consisting of La2O3, ZrO2 and CeO2. The examples of the present application enable the battery prepared by the provided positive electrode material to have a lower storage expansion ratio, a higher capacity retention ratio, and improved cycle performance at a high charge cutoff voltage by the interaction of at least three kinds of oxides.

公开(公告)号：US12126016B2

公开(公告)日：2024-10-22

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 ,  H01M4/02

CPC classification number: H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/028

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.

公开(公告)号：US10944106B2

公开(公告)日：2021-03-09

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 ,  H01M4/02

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：US20220223862A1

公开(公告)日：2022-07-14

申请号：US17709066

申请日：2022-03-30

Applicant: Ningde Amperex Technology Limited

Inventor： Xia Wu ,  Kai Wang ,  Leimin Xu ,  Meng Wang

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

Abstract: A positive electrode material contains LixNazCo1-yMyO2, where 0.6

公开(公告)号：US11611068B2

公开(公告)日：2023-03-21

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 ,  H01M4/52 ,  H01M4/525 ,  H01M10/0525 ,  H01M4/131 ,  H01M4/02

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：US11024872B2

公开(公告)日：2021-06-01

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 ,  H01M4/02

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：US20170207456A1

公开(公告)日：2017-07-20

申请号：US15409370

申请日：2017-01-18

Applicant: Ningde Amperex Technology Limited

Inventor： Hui Liu ,  Leimin Xu ,  Liang Wang ,  Meng Wang ,  Wei Wang ,  Na Liu

IPC: H01M4/525 ,  H01M4/36 ,  H01M4/505 ,  H01M10/0525

CPC classification number: H01M4/525 ,  H01M4/0471 ,  H01M4/131 ,  H01M4/1391 ,  H01M4/366 ,  H01M4/505 ,  H01M10/0525 ,  H01M2004/028

Abstract: The present invention relates to the field of the Li-ion battery and, particularly, relates to a cathode material for the Li-ion battery, a method for preparing the same and a Li-ion battery containing the same. A surface of the cathode material of spinel type lithium-manganese-nickel-containing composite oxide of the present invention is coated with a complex coating layer composed of a first coating layer containing Li7La3Zr2O12 and a second coating layer containing LiNbO3. The method includes: firstly coating the first coating layer containing Li7La3Zr2O12 on the surface of spinel type lithium-manganese-nickel-containing composite oxide in a solid phase method; and then coating the second coating layer containing LiNbO3 in a hydro-thermal method. The cathode material of the present invention improves cycle stability and rate performance of spinel type lithium-manganese-nickel-containing composite oxide, and meanwhile reduces dissolution and erosion effect of the electrolyte on the cathode material during charging or discharging.

公开(公告)号：US11862797B2

公开(公告)日：2024-01-02

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 ,  H01M4/62 ,  H01M4/525 ,  H01M4/505 ,  H01M4/131 ,  H01M10/0525 ,  H01M4/02

CPC classification number: H01M4/5825 ,  H01M4/131 ,  H01M4/505 ,  H01M4/525 ,  H01M4/621 ,  H01M4/624 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/028

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：US10741834B2

公开(公告)日：2020-08-11

申请号：US16057810

申请日：2018-08-07

Applicant: Ningde Amperex Technology Limited

Inventor： Fei Zhang ,  Meng Wang ,  Leimin Xu ,  Qunfeng Wang

IPC: H01M4/131 ,  H01M4/36 ,  H01M4/48 ,  H01M4/505 ,  H01M4/525 ,  H01M4/62 ,  H01M10/0525 ,  H01M4/02

Abstract: The examples of the present application provide a positive electrode material and a lithium-ion battery. The positive electrode material comprises: a substrate material; and a coating material formed on at least one part of a surface of the substrate material; the general formula of the substrate material being LixCoyM1-yO2, wherein 1.0≤x≤1.2, 0.8≤y≤1.0 and M is at least one selected from the group consisting of Mg, Ti, Al, Zr, Ni, Mn; the coating material includes Y2O3 and at least two selected from the group consisting of La2O3, ZrO2 and CeO2. The examples of the present application enable the battery prepared by the provided positive electrode material to have a lower storage expansion ratio, a higher capacity retention ratio, and improved cycle performance at a high charge cutoff voltage by the interaction of at least three kinds of oxides.