公开(公告)号：US20240079579A1

公开(公告)日：2024-03-07

申请号：US18508954

申请日：2023-11-14

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Zhenguo ZHANG ,  Xingkai HU ,  Xiang YIN ,  Jingpeng FAN ,  Sihui WANG ,  Zhijie YAO ,  Na LIU

IPC: H01M4/505 ,  C01G45/12

CPC classification number: H01M4/505 ,  C01G45/1242 ,  H01M2004/028

Abstract: A positive active material, a secondary battery, a battery module, a battery pack, and an electrical device are disclosed. The positive active material includes a spinel-type lithium-manganese-containing composite oxide with a molecular formula of Li1+xAaMbXcMn2−a−b−c−xO4−t. In the molecular formula: A is a doping element for a manganese site of the spinel-type lithium-manganese-containing composite oxide; M is used for combining with O to form a second phase containing a polyoxyanion, and M includes one or more of B, C, N, Si, P, S, or Cl; X includes one or more of Mg, Al, Si, Ca, Sc, Ti, Cr, Fe, Co, Ni, Cu, Zn, or Zr; and the molecular formula satisfies: −0.1≤x≤0.3, 0

公开(公告)号：US20240063381A1

公开(公告)日：2024-02-22

申请号：US18498176

申请日：2023-10-31

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Bangrun WANG ,  Zhenguo ZHANG ,  Sihui WANG ,  Na LIU

IPC: H01M4/505 ,  H01M4/583 ,  H01M4/525 ,  H01M4/04 ,  H01M10/052

CPC classification number: H01M4/505 ,  H01M4/583 ,  H01M4/525 ,  H01M4/0471 ,  H01M4/0404 ,  H01M10/052 ,  H01M2004/021

Abstract: Provided are an electrode active material, a method for preparing the electrode active material, an electrode plate, and a battery. The electrode active material includes carbon-coated metal oxide particles. The metal oxide particles satisfy a formula (2):


AcMdOe  (2),

where element A is selected from one or more of alkali metal elements or alkaline earth metal elements; element M is selected from one or more of transition metal elements having a relative atomic mass smaller than 65; and c>0, d>0, and e>0.

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：US20240262711A1

公开(公告)日：2024-08-08

申请号：US18500131

申请日：2023-11-02

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Zhenguo ZHANG ,  Sihui WANG ,  Jingpeng FAN ,  Na LIU

IPC: C01G53/00

CPC classification number: C01G53/54 ,  C01P2006/40

Abstract: The present application provides a positive electrode active material of Li1+xNiyMzMn2-x-y-zO4-k, −0.1≤x≤0.2, 0.4≤y≤0.6, 0≤z≤0.2, M is one or more of Cr, Mo, Nb, Ru, P, S, Ta, W, Tl, and Ti, and in a first-cycle charging curve of a half battery of the positive electrode active material, a ratio of a charging capacity of 3.5 V-4.4 V to a charging capacity of 3.5 V-4.95 V is A, A meets 0.04≤A≤0.3, a product of k and A meets 0≤kA≤0.015, and the first-cycle charging curve is measured at a rate of 0.1 C. The positive electrode active material of the present application balances high kinetic performance and high chemical stability, and a corresponding secondary battery has both high-rate discharge capability and long-term storage stability.

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：US20190044135A1

公开(公告)日：2019-02-07

申请号：US15577290

申请日：2017-08-24

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： RUI DU ,  Na LIU ,  Yongchao LIU ,  Sihui WANG ,  Zhongling XU ,  Chao YANG

IPC: H01M4/505 ,  H01M4/62 ,  H01M4/525 ,  H01M4/50

Abstract: The disclosure provides a modified positive electrode active material, a preparation method thereof, and an electrochemical energy storage device. The modified positive electrode active material comprises positive electrode active material substrate; first oxide layer, coated on the surface of the positive electrode active material substrate and selected from one or more of oxides of element M being selected from the group of one or more of Li, Al, Zr, Mg, Ti, Y, Si, Ca, Cr, Fe, Zn, Nb, Sn, Ba, and Cd; and second oxide layer having a continuous layered structure, coated on the surface of the first oxide layer and selected from one or more of oxides of element M′ being selected from one or more of Li, B, P, As, Pb, V, Mo, and Sn. High temperature storage performance and cycling performance of electrochemical energy storage device are improved by the modified positive electrode active material.

公开(公告)号：US20230420751A1

公开(公告)日：2023-12-28

申请号：US18466815

申请日：2023-09-13

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Zhenguo ZHANG ,  Chang PENG ,  Sihui WANG ,  Na LIU ,  Jingpeng FAN ,  Dong ZHAO ,  Zhijie YAO

IPC: H01M10/42 ,  H01M4/36 ,  H01M4/525 ,  H01M4/505 ,  H01M4/58 ,  H01M10/0568

CPC classification number: H01M10/4235 ,  H01M4/366 ,  H01M4/525 ,  H01M4/505 ,  H01M4/5825 ,  H01M10/0568 ,  H01M2004/021

Abstract: A secondary battery includes a positive electrode sheet having a positive electrode active material and a non-aqueous electrolyte. The positive electrode active material includes a central core material and a modification layer disposed on a surface of the central core material. The modification layer including an orthophosphate with a molecular formula Aa+x[PO4]3−y, where A denotes one or more of Li, Na, K, Rb, Cs, Mg, Ca, Ba, Ni, Fe, Co, Ti, Al, Cr, V, Nb, and W, 1≤a≤6, and ax=3y. The non-aqueous electrolyte includes a fluorinated phosphate with a molecular formula Bb+m[PO1+cF3-c]c−n, where B denotes one or more of Li, Na, K, Rb, Cs, Mg, Ca, and Ba, 1≤b≤2, c denotes 1 or 2, and bm=cn.

公开(公告)号：US20230216047A1

公开(公告)日：2023-07-06

申请号：US18173328

申请日：2023-02-23

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Zhenguo ZHANG ,  Sihui WANG

IPC: H01M4/505 ,  H01M4/525 ,  H01M4/1315 ,  C01G53/00

CPC classification number: H01M4/505 ,  H01M4/525 ,  H01M4/1315 ,  C01G53/54 ,  C01P2004/51

Abstract: This application provides a lithium-nickel-manganese-based composite oxide material, where a K value of the lithium-nickel-manganese-based composite oxide material ranges from 1 to 2, and the K value is calculated based on the following formula: K=Dv50/dv50, where dv50 is a volume median crystallite diameter of crystal particles of the lithium-nickel-manganese-based composite oxide material; and Dv50 is a volume median particle diameter of the lithium-nickel-manganese-based composite oxide material.

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.