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：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.

公开(公告)号：US20240292639A1

公开(公告)日：2024-08-29

申请号：US18595150

申请日：2024-03-04

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Zhihan HUANG ,  Weifeng Liang ,  Ruoxuan Shi ,  Bo Xu

IPC: H10K30/86 ,  C07C213/00 ,  C07C213/08 ,  C07C217/92 ,  C07D333/20 ,  H10K30/40 ,  H10K85/60 ,  H10K101/30

CPC classification number: H10K30/86 ,  C07C213/00 ,  C07C213/08 ,  C07C217/92 ,  C07D333/20 ,  H10K30/40 ,  H10K85/631 ,  H10K85/636 ,  H10K85/655 ,  H10K2101/30

Abstract: The present disclosure provides a compound having a structure of formula (I), where R1 and R2 are defined in the specification. In addition, the present disclosure further provides a preparation method and use of the compound of formula (I), in particular to a perovskite solar cell including the compound of formula (I). This compound as a hole transport material has the advantages in that the use of additives can be avoided, thereby improving the photoelectric conversion efficiency and stability of the cell.