公开(公告)号：US11721804B2

公开(公告)日：2023-08-08

申请号：US17938930

申请日：2022-09-06

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Hongyu Liu ,  Changfeng Bie ,  Xue Leng ,  Na Liu

IPC: H01M4/36 ,  H01M4/587 ,  H01M4/133 ,  H01M4/136 ,  H01M10/0525 ,  C01B25/45 ,  H01M4/58 ,  H01M4/02

CPC classification number: H01M4/366 ,  C01B25/45 ,  H01M4/133 ,  H01M4/136 ,  H01M4/587 ,  H01M4/5825 ,  H01M10/0525 ,  C01P2002/54 ,  C01P2004/04 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2004/80 ,  C01P2006/11 ,  C01P2006/12 ,  C01P2006/40 ,  H01M2004/021 ,  H01M2004/028 ,  H01M2220/20

Abstract: A positive active material made of carbon-coated lithium iron phosphate includes a lithium iron phosphate substrate, and a carbon coating layer on a surface of the substrate. The lithium iron phosphate substrate has a general structural formula LiFe1-aMaPO4, where M is at least one selected from Cu, Mn, Cr, Zn, Pb, Ca, Co, Ni, Sr, Nb, or Ti, and 0≤a≤0.01. A carbon coating factor of the carbon-coated lithium iron phosphate,





η
=


BET
⁢
1


BET
⁢
2




,




satisfies 0.81≤η≤0.95, where BET1 denotes a specific surface area of mesopore and macropore structures in the carbon-coated lithium iron phosphate, and BET2 denotes a total specific surface area of the carbon-coated lithium iron phosphate.

公开(公告)号：US11121362B2

公开(公告)日：2021-09-14

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 ,  H01M4/505 ,  H01M4/525 ,  C30B29/22 ,  H01M4/02

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：US20240194853A1

公开(公告)日：2024-06-13

申请号：US18585057

申请日：2024-02-23

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Rui Du ,  Na Liu ,  Yongchao Liu ,  Sihui Wang ,  Deyu Zhao ,  Xue Leng

IPC: H01M4/134 ,  H01M4/02 ,  H01M4/131 ,  H01M4/36 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525

CPC classification number: H01M4/134 ,  H01M4/131 ,  H01M4/366 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/028 ,  H01M2220/20

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 whose surface is provided with a coating layer. The positive active material is secondary particles, and a particle size Dn10 of the positive active material satisfies: 0.5 μm≤Dn10≤3 μm. In this application, particle morphology of the positive active material and the 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, decrease gas production of the electrochemical energy storage apparatus, and improve storage performance of the electrochemical energy storage apparatus without deteriorating energy density, cycle performance and rate performance of the electrochemical energy storage apparatus.

公开(公告)号：US11949093B2

公开(公告)日：2024-04-02

申请号：US17132567

申请日：2020-12-23

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Rui Du ,  Na Liu ,  Yongchao Liu ,  Sihui Wang ,  Deyu Zhao ,  Xue Leng

IPC: H01M4/134 ,  H01M4/02 ,  H01M4/131 ,  H01M4/36 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525

CPC classification number: H01M4/134 ,  H01M4/131 ,  H01M4/366 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/028 ,  H01M2220/20

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 whose surface is provided with a coating layer. The positive active material is secondary particles, and a particle size Dn10 of the positive active material satisfies: 0.5 μm≤Dn10≤3 μm. In this application, particle morphology of the positive active material and the 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, decrease gas production of the electrochemical energy storage apparatus, and improve storage performance of the electrochemical energy storage apparatus without deteriorating energy density, cycle performance and rate performance of the electrochemical energy storage apparatus.

公开(公告)号：US20230223523A1

公开(公告)日：2023-07-13

申请号：US18187718

申请日：2023-03-22

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Xue Leng ,  Rui Du ,  Na Liu ,  Yongchao Liu ,  Huan Ni

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

CPC classification number: H01M4/366 ,  H01M4/525 ,  H01M4/505 ,  H01M4/131 ,  H01M2004/028

Abstract: A positive electrode plate for secondary battery, a secondary battery, a battery module, a battery pack, and an apparatus are provided. Some embodiments provide a positive electrode plate for secondary battery, where the positive electrode plate includes a positive electrode current collector and a positive electrode active substance layer located on a surface of the positive electrode current collector, the positive electrode active substance layer includes a positive electrode active substance, the positive electrode active substance contains a first lithium-nickel transition metal oxide and a second lithium-nickel transition metal oxide, the first lithium-nickel transition metal oxide contains a first matrix and a first coating layer located on a surface of the first matrix, the first matrix is secondary particles, and the second lithium-nickel transition metal oxide is single crystal particles or particles with quasi-single crystal morphology.

公开(公告)号：US20230035380A1

公开(公告)日：2023-02-02

申请号：US17935125

申请日：2022-09-25

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Xue Leng ,  Hongyu Liu ,  Changfeng Bie ,  Na Liu ,  Wanqing Cai

IPC: H01M4/58 ,  H01M10/0525

Abstract: A positive active material is provided. In some embodiments, the positive material includes: a substrate and a coating layer coating the substrate, wherein the coating layer includes a fast ion conductor layer and a carbon coating layer, the substrate includes more than one compound of formula (I): LiFe1-aM1aPO4 formula (I), in formula (I), M1 is more than one selected from Cu, Mn, Cr, Zn, Pb, Ca, Co, Ni, Sr, Nb and Ti, and 0≤a≤0.01; the fast ion conductor layer includes a fast ion conductor of a NASICON structure shown in formula (II), Li3-bFe2-bM2b(PO4)3 formula (II), in formula (II), M2 is more than one selected from Ti, Zr, Hf, Ge and Sn with valence of +4, and 0≤b≤1.