公开(公告)号：US20220077464A1

公开(公告)日：2022-03-10

申请号：US17418401

申请日：2019-12-27

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Rui DU ,  Yongchao LIU ,  Chongheng SHEN ,  Sihui WANG ,  Na LIU

IPC: H01M4/525 ,  H01M4/36 ,  H01M10/0525 ,  H01M4/505 ,  C01G53/00

Abstract: This application provides a positive active material, a positive electrode plate, an electrochemical energy storage apparatus, and an apparatus. The positive active material is LixNiyCozMkMepOrAm, or LixNiyCozMkMepOrAm with a coating layer on its surface; and the positive active material is single crystal or quasi-single crystal particles, and a particle size Dn10 of the positive active material satisfies: 0.3 μm≤Dn10≤2 μm. In this application, particle morphology of the positive active material and an amount of micro powder in the positive active material are properly controlled, to effectively reduce side reactions between the positive active material and an electrolyte solution, decrease gas production of the electrochemical energy storage apparatus, and improve storage performance of the electrochemical energy storage apparatus without deteriorating an energy density, cycle performance, and rate performance of the electrochemical energy storage apparatus.

公开(公告)号：US20210167366A1

公开(公告)日：2021-06-03

申请号：US17123544

申请日：2020-12-16

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Xue LENG ,  Rui DU ,  Na LIU ,  Yongchao LIU ,  Huan NI

IPC: H01M4/36 ,  H01M10/0525 ,  H01M4/1315 ,  H01M4/525 ,  H01M4/505 ,  C30B29/22

Abstract: The present application provides a positive electrode sheet for a secondary battery, the positive electrode sheet includes a positive electrode current collector and a positive electrode active material layer on a surface of the positive electrode current collector, the positive electrode active material layer includes a positive electrode active material, the positive electrode active material includes a first lithium nickel transition metal oxide and a second lithium nickel transition metal oxide, the first lithium nickel transition metal oxide includes a first substrate and a first coating layer on a surface of the first substrate, the first substrate is secondary particles, and the second lithium nickel transition metal oxide is a single crystal or single-crystal-like morphological particles.

公开(公告)号：US20210126242A1

公开(公告)日：2021-04-29

申请号：US17135552

申请日：2020-12-28

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Rui DU ,  Yongchao Liu ,  Deyu Zhao ,  Na Liu

IPC: H01M4/131 ,  H01M4/134 ,  H01M4/525 ,  H01M4/505 ,  C01G53/00 ,  H01M10/0525

Abstract: This application relates to the field of battery technologies, and in particular, to a high-compacted-density positive electrode material and an electrochemical energy storage apparatus. The positive electrode material includes a lithium-nickel transition metal oxide A and a lithium-nickel transition metal oxide B. The lithium-nickel transition metal oxide A is secondary particles, whose chemical formula is shown in formula I: Lia1(Nib1Coc1Mnd1)x1M1-x1O2-e1Xe1. The lithium-nickel transition metal oxide B is a monocrystalline structure or a monocrystalline-like structure, whose chemical formula is shown in formula II: Lia2(Nib2Coc2Mnd2)x2M′1-x2O2-e2X′e2 (II). The positive electrode material of this application includes the large-particle lithium-nickel transition metal oxide A and the small-particle lithium-nickel transition metal oxide B to improve an energy density of the battery. A degree of crystallinity and particle size distribution of the mixed positive electrode material can improve a compacted density of the high-nickel active material, and ensure lower gassing and good cycle performance.

公开(公告)号：US20230307635A1

公开(公告)日：2023-09-28

申请号：US18321318

申请日：2023-05-22

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Rui DU ,  Yongchao Liu ,  Chongheng Shen ,  Sihui Wang ,  Na Liu

IPC: H01M4/525 ,  C01G53/00 ,  H01M4/36 ,  H01M4/505 ,  H01M10/0525

CPC classification number: H01M4/525 ,  C01G53/50 ,  H01M4/366 ,  H01M4/505 ,  H01M10/0525 ,  C01P2002/54 ,  C01P2004/51 ,  C01P2004/61 ,  C01P2006/12 ,  C01P2006/40 ,  H01M2004/021

Abstract: This application provides a positive active material, a positive electrode plate, an electrochemical energy storage apparatus, and an apparatus. The positive active material is LixNiyCozMkMepOrAm, or LixNiyCozMkMepOrAm with a coating layer on its surface; and the positive active material is single crystal or quasi-single crystal particles, and a particle size Dn10 of the positive active material satisfies: 0.3 μm≤Dn10≤2 μm. In this application, particle morphology of the positive active material and an amount of micro powder in the positive active material are properly controlled, to effectively reduce side reactions between the positive active material and an electrolyte solution, decrease gas production of the electrochemical energy storage apparatus, and improve storage performance of the electrochemical energy storage apparatus without deteriorating an energy density, cycle performance, and rate performance of the electrochemical energy storage apparatus.

公开(公告)号：US20210119209A1

公开(公告)日：2021-04-22

申请号：US17135519

申请日：2020-12-28

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Rui DU ,  Yongchao LIU ,  Sihui WANG ,  Deyu ZHAO ,  Na LIU

IPC: H01M4/525 ,  H01M4/505 ,  H01M4/485 ,  H01M10/0525

Abstract: The present application relates to the electrochemical field, and in particular, to a positive electrode material, and an electrochemical energy storage apparatus having thereof. The present application provides a positive electrode material, including a substrate. The substrate includes secondary particles containing primary particles. A surface of the substrate is coated with an oxide coating layer. The oxide coating layer comprises a coating element, and the coating element is selected from one or more of Al, Ba, Zn, Ti, Zr, Mg, W, Y, Si, Sn, B, Co, or P. The electrochemical energy storage apparatus comprises the foregoing positive electrode material.

公开(公告)号：US20240204187A1

公开(公告)日：2024-06-20

申请号：US18594726

申请日：2024-03-04

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO. LIMITED

Inventor： Chongheng SHEN ,  Rui DU ,  Yongchao LIU ,  Deyu ZHAO ,  Na LIU

IPC: H01M4/525 ,  H01M4/02 ,  H01M4/36 ,  H01M4/505

CPC classification number: H01M4/525 ,  H01M4/366 ,  H01M4/505 ,  H01M2004/028

Abstract: This disclosure relates to the electrochemical field, and in particular, to a positive electrode material and a preparation method and usage thereof. The positive electrode material of this disclosure includes a substrate, where a general formula of the substrate is LixNiyCozMkMepOrAm, where 0.95≤x≤1.05, 0.5≤y≤1, 0≤z≤1, 0≤k≤1, 0≤p≤0.1, 1≤r≤5.2, 0≤m≤2, m+r≤2, M is selected from one or more of Mn and Al, Me is selected from one or more of Zr, Zn, Cu, Cr, Mg, Fe, V, Ti, Sr, Sb, Y, W, and Nb, and A is selected from one or more of N, F, S, and Cl; and an oxygen defect level of the positive electrode material satisfies at least one of condition (1) or condition (2): (1) 1.77≤OD1≤1.90; or (2) 0.69≤OD2≤0.74.

公开(公告)号：US20230126587A1

公开(公告)日：2023-04-27

申请号：US18087064

申请日：2022-12-22

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Rui DU ,  Sihui WANG ,  Yongchao LIU ,  Chi LUO ,  Deyu ZHAO ,  Na LIU

IPC: H01M4/36 ,  H01M4/505 ,  H01M4/525 ,  G01N21/33

Abstract: This disclosure relates to the field of electrochemistry, and in particular, to a positive electrode material, an electrochemical energy storage apparatus and a vehicle. The positive electrode material of this disclosure includes a substrate, with a formula of the substrate being LixNiyCOzMkMepOrAm, where 0.95≤x≤1.05, 0.50≤y≤0.95, 0≤z≤0.2, 0≤k≤0.4, 0≤p≤0.05, 1≤r≤2, 0≤m≤2, m+r≤2; a coating layer is disposed on the substrate, where the coating layer includes a coating element; and absorbance of nickel leachate per unit mass of the positive electrode material w≤0.7.

公开(公告)号：US20220085378A1

公开(公告)日：2022-03-17

申请号：US17518744

申请日：2021-11-04

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Rui DU ,  Sihui WANG ,  Yongchao LIU ,  Chi LUO ,  Deyu ZHAO ,  Na LIU

IPC: H01M4/62 ,  H01M4/36 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525

Abstract: This disclosure relates to the field of electrochemistry, and in particular, to a positive electrode material. The positive electrode material of this disclosure includes a substrate, with a formula of the substrate being LixNiyCozMkMepOrAm, where 0.95≤x≤1.05, 0.50≤y≤0.95, 0≤z≤0.2, 0≤k≤0.4, 0≤p≤0.05, 1≤r≤2, 0≤m≤2, m+r≤2; a coating layer is disposed on the subs hate, where the coating layer includes a coating element; and absorbance of nickel leachate per unit mass of the positive electrode material w≤0.7.

公开(公告)号：US20220059837A1

公开(公告)日：2022-02-24

申请号：US17517958

申请日：2021-11-03

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO. LIMITED

Inventor： Chongheng SHEN ,  Rui DU ,  Yongchao LIU ,  Deyu ZHAO ,  Na LIU

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

Abstract: This disclosure relates to the electrochemical field, and in particular, to a positive electrode material and a preparation method and usage thereof. The positive electrode material of this disclosure includes a substrate, where a general formula of the substrate is LixNiyCozMkMepOrAm, where 0.95≤x≤1.05, 0.5≤y≤1, 0≤z≤1, 0≤k≤1, 0≤p≤0.1, 1≤r≤5.2, 0≤m≤2, m+r≤2, M is selected from one or more of Mn and Al, Me is selected from one or more of Zr, Zn, Cu, Cr, Mg, Fe, V, Ti, Sr, Sb, Y, W, and Nb, and A is selected from one or more of N, F, S, and Cl; and an oxygen defect level of the positive electrode material satisfies at least one of condition (1) or condition (2): (1) 1.77≤OD1≤1.90; or (2) 0.69≤OD2≤0.74.

公开(公告)号：US20200006767A1

公开(公告)日：2020-01-02

申请号：US16452684

申请日：2019-06-26

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Rui DU ,  Na LIU ,  Chuanmiao YAN ,  Yongchao LIU

IPC: H01M4/525 ,  H01M4/505 ,  H01M4/36 ,  H01M4/131 ,  H01M10/0525

Abstract: Provided are a positive electrode plate and a lithium ion battery. The positive electrode plate includes a positive electrode current collector and a positive electrode active material layer. The positive electrode active material layer includes a first sub-layer as the outermost sub-layer of the positive active material layer, and a second sub-layer disposed between the positive electrode current collector and the first sub-layer. The first sub-layer includes a first positive electrode active material, the second sub-layer includes a second positive electrode active material. The first positive electrode active material is one or more of a ternary positive electrode material having a monocrystalline or quasi-monocrystalline structure, and a coating-modified material thereof. The present disclosure can improve energy density of the lithium ion battery and reduce gas production of the lithium ion battery, so that the lithium ion battery has high energy density and good storage performance at the same time.