公开(公告)号：US20240047756A1

公开(公告)日：2024-02-08

申请号：US18489849

申请日：2023-10-19

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xiaolong Li ,  Xinxin Zhang ,  Wenguang Lin ,  Xiaoxia Chen ,  Ben Liu ,  Shikang Yao ,  Jiadian Lan

IPC: H01M10/0569 ,  H01M10/625 ,  H01M10/0585 ,  H01M4/133 ,  H01M50/103 ,  H01M50/209 ,  H01M50/249

CPC classification number: H01M10/0569 ,  H01M10/625 ,  H01M10/0585 ,  H01M4/133 ,  H01M50/103 ,  H01M50/209 ,  H01M50/249

Abstract: This application relates to a secondary battery, a battery module, a battery pack, and an electric apparatus. The secondary battery includes: a negative electrode plate including a negative electrode current collector and a negative electrode film layer disposed on the negative electrode current collector, the negative electrode film layer containing a carbon material; a positive electrode plate including a positive electrode current collector and a positive electrode active material layer disposed on the positive electrode current collector, the positive electrode active material layer containing a sodium-ion active material; and an electrolyte disposed between the negative electrode plate and the positive electrode plate, the electrolyte containing sodium salt and lithium salt.

公开(公告)号：US20230285933A1

公开(公告)日：2023-09-14

申请号：US17937457

申请日：2022-10-02

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Jiarui Tian ,  Yongsheng Guo ,  Cong Cheng ,  Xinxin Zhang ,  Na Liu ,  Chuying Ouyang

IPC: B01J20/22 ,  H01M50/449 ,  H01M50/446 ,  H01M50/417 ,  B01J20/28

CPC classification number: B01J20/226 ,  B01J20/28059 ,  B01J20/28061 ,  B01J20/2808 ,  B01J20/28083 ,  B01J20/28085 ,  H01M50/417 ,  H01M50/446 ,  H01M50/449

Abstract: An organic-inorganic hybrid porous material. The organic-inorganic hybrid porous material contains a doping element A are provided. In some emodiments, the element A is one or more selected from: Li, Na, K, Rb, Cs, Sr, Zn, Mg, Ca, or any combination thereof. An external specific surface area of the organic-inorganic hybrid porous material is 1 to 100 m2/g. A ratio of the external specific surface area to a total specific surface area of the organic-inorganic hybrid porous material is 0.7 to 0.9.

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.