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.