公开(公告)号：US20240254003A1

公开(公告)日：2024-08-01

申请号：US18635016

申请日：2024-04-15

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Yao Jiang ,  Chuying Ouyang ,  Xinxin Zhang ,  Bin Deng ,  Bo Xu ,  Zhiqiang Wang ,  Tianci Yuan ,  Shangdong Chen

IPC: C01G45/12 ,  H01M4/02 ,  H01M4/04 ,  H01M4/36 ,  H01M4/505 ,  H01M4/58 ,  H01M4/583

CPC classification number: C01G45/1228 ,  H01M4/0471 ,  H01M4/366 ,  H01M4/505 ,  H01M4/5825 ,  H01M4/583 ,  C01P2006/10 ,  C01P2006/40 ,  H01M2004/028

Abstract: Provided are a positive electrode active material with a core-shell structure, a preparation method of positive electrode active material, a positive electrode plate, a secondary battery, a battery module, a battery pack, and an electric apparatus. The positive electrode active material includes a core containing LimAxMn1-yByP1-zCzO4-nDn, a first coating layer covering the core and containing a crystalline pyrophosphate MaP2O7 and an oxide M′bOc, and a second coating layer covering the first coating layer. The positive electrode active material in this application can reduce the generation of Li/Mn antisite defects, reduce the dissolution of manganese, and decrease the lattice change rate, increasing the capacity of the secondary battery and improving the cycling performance, high-temperature storage performance, and safety performance of the secondary battery.

公开(公告)号：US20240308871A1

公开(公告)日：2024-09-19

申请号：US18674940

申请日：2024-05-27

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Tianci Yuan ,  Yao Jiang ,  Xinxin Zhang ,  Chuying Ouyang ,  Shangdong Chen ,  Lingjing Wu ,  Weibin Kang ,  Zhiqiang Wang ,  Shaojun Liu ,  Bin Deng

IPC: C01G45/12 ,  H01M4/02 ,  H01M4/04 ,  H01M4/1391 ,  H01M4/36 ,  H01M4/58 ,  H01M4/583

CPC classification number: C01G45/1242 ,  H01M4/0471 ,  H01M4/1391 ,  H01M4/366 ,  H01M4/5825 ,  H01M4/583 ,  C01P2002/72 ,  C01P2002/85 ,  C01P2006/10 ,  H01M2004/028

Abstract: The present application provides a positive electrode active material, a method for the preparation thereof and a positive electrode plate, a secondary battery and an electrical device containing the same. The positive electrode active material having a core-shell structure, comprising a core and a shell covering the core, wherein the core has a chemical formula of LiaAxMn1-yByP1-zCzO4-nDn, the shell comprises a first cladding layer covering the core, and a second cladding layer covering the first cladding layer, wherein the first cladding layer comprises pyrophosphate MP2O7 and phosphate XPO4, and the second cladding layer comprises carbon. The positive electrode active material of the present application enables the secondary battery and electrical device to have a relatively high energy density, and good cycling performance, rate performance and safety performance.

公开(公告)号：US20240413317A1

公开(公告)日：2024-12-12

申请号：US18808108

申请日：2024-08-19

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Tianci Yuan ,  Yao Jiang ,  Xinxin Zhang ,  Chuying Ouyang ,  Shangdong Chen ,  Lingjing Wu ,  Weibin Kang

IPC: H01M4/36 ,  C01B25/45 ,  H01M4/02 ,  H01M4/58 ,  H01M4/62

Abstract: Provided are a positive electrode active material and a preparation method thereof, a positive electrode plate, a secondary battery, a battery module, a battery pack, and an electric apparatus. The positive electrode active material includes a core and a shell layer enveloping the core, the core having a chemical formula LiaAxMn1-yByP1-zCzO4-nDn, where A includes one or more elements selected from Zn, Al, Na, K, Mg, Nb, Mo, and W, B includes one or more elements selected from Ti, V, Zr, Fe, Ni, Mg, Co, Ga, Sn, Sb, Nb, and Ge, C includes one or more elements selected from B, S, Si, and N, and D includes one or more elements selected from S, F, Cl, and Br; and the shell layer is a doped carbon layer, a doping element in the doped carbon layer including any one or more selected from nitrogen, phosphorus, sulfur, boron, and fluorine.

公开(公告)号：US20240332527A1

公开(公告)日：2024-10-03

申请号：US18740540

申请日：2024-06-12

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Tianci Yuan ,  Yao Jiang ,  Xinxin Zhang ,  Chuying Ouyang ,  Lingjing Wu ,  Shangdong Chen ,  Weibin Kang ,  Zhiqiang Wang ,  Shaojun Liu ,  Bin Deng

IPC: H01M4/58 ,  H01M4/02 ,  H01M4/04 ,  H01M4/36 ,  H01M4/583 ,  H01M10/052

CPC classification number: H01M4/5825 ,  H01M4/0471 ,  H01M4/366 ,  H01M4/583 ,  H01M10/052 ,  H01M2004/021 ,  H01M2004/028

Abstract: Provided are a positive electrode active material, a method for the preparation thereof and a positive electrode plate, a secondary battery and an electrical device. The positive electrode active material having a core-shell structure, including a core and a shell cladding the core, the core has a chemical formula of LimAxMn1-yByP1-zCzO4-nDn, the shell includes a first cladding layer cladding the core, a second cladding layer cladding the first cladding layer and a third cladding layer cladding the second cladding layer, the first cladding layer includes crystalline pyrophosphates LiaMP2O7 and/or Mb(P2O7)c, the second cladding layer includes crystalline phosphate XPO4, and the third cladding layer is carbon. The positive electrode active material of the present application enables the secondary battery and electrical device to have a relatively high energy density, and good cycling performance, rate performance and safety performance.

公开(公告)号：US20240294392A1

公开(公告)日：2024-09-05

申请号：US18527290

申请日：2023-12-03

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Yao Jiang ,  Xinxin Zhang ,  Chuying Ouyang ,  Bo Xu ,  Bin Deng ,  Tianci Yuan ,  Zhiqiang Wang ,  Shangdong Chen

IPC: C01G45/00 ,  H01M4/02 ,  H01M4/36

CPC classification number: C01G45/006 ,  H01M4/366 ,  C01P2004/84 ,  C01P2006/10 ,  C01P2006/40 ,  H01M2004/021 ,  H01M2004/028

Abstract: Provided are a positive electrode active material and a preparation method thereof, a positive electrode plate, a secondary battery, a battery module, a battery pack, and an electric apparatus. The positive electrode active material includes a core including Li1+xMn1−yAyP1−z,RzO4, a first coating layer enveloping the core and containing a crystalline pyrophosphate LiaMP2O7 and/or Mb(P2O7)e, a second coating layer enveloping the first coating layer and containing a crystalline oxide M′dOe, and a third coating layer enveloping the second coating layer and containing carbon. The positive electrode active material of this application can reduce Li/Mn anti-site defects generated, reduce dissolving-out amount of manganese, lower the lattice change rate, increase the capacity of the secondary battery, and improve the cycling performance, high-temperature storage performance, and safety performance of the secondary battery.