公开(公告)号：US20230116710A1

公开(公告)日：2023-04-13

申请号：US18052397

申请日：2022-11-03

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Yifan XUE ,  Bin YAO ,  Yichen WU

IPC: H01M4/66 ,  H01M4/80 ,  H01M4/74

Abstract: A negative electrode current collector includes a first metal layer, a second metal layer, and a prelithiation layer disposed between the first metal layer and the second metal layer. At least one of the first metal layer or the second metal layer has a porous structure.

公开(公告)号：US20220204355A1

公开(公告)日：2022-06-30

申请号：US17655092

申请日：2022-03-16

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Yongshou LIN ,  Guobao WANG ,  Ke WANG ,  Jiang LIU ,  Bin YAO

IPC: C01D15/08 ,  C01B25/37 ,  H01M4/58 ,  H01M10/54 ,  C25C1/12 ,  H01M10/0525

Abstract: A method for producing a lithium iron phosphate precursor by using a retired lithium iron phosphate battery as a raw material is provided, which includes steps of: soaking a battery cell in acid, performing electrolysis to reclaim copper, oxidizing ferrous iron, precipitating iron phosphate, and precipitating lithium carbonate. After precipitation is completed, performing one-step reclaim to obtain the lithium iron phosphate precursor.

公开(公告)号：US20230282813A1

公开(公告)日：2023-09-07

申请号：US18197108

申请日：2023-05-15

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Bin YAO ,  Ying HUANG ,  Ruiying SHI ,  Jiang LIU ,  Xuefang CHEN

IPC: H01M4/36 ,  H01M10/0525 ,  H01M4/62 ,  H01M4/66 ,  H01M4/58 ,  H01M4/583

CPC classification number: H01M4/366 ,  H01M10/0525 ,  H01M4/624 ,  H01M4/663 ,  H01M4/5825 ,  H01M4/583 ,  H01M2220/20 ,  H01M2004/027

Abstract: An electrode assembly may comprise a positive electrode plate and a negative electrode plate, wherein a positive electrode active material layer of the positive electrode plate may comprise a positive electrode active material and a quinone compound; and a negative electrode active material layer of the negative electrode plate may comprise a negative electrode active material and a conductive polymer material, wherein based on the mass of the positive electrode active material layer, the mass content of the quinone compound mc % may be 0.5% to 3%; the capacity per gram of the quinone compound may be CapC; the capacity per gram of the positive electrode active material may be Cap; and based on the mass of the negative electrode active material layer, the mass content of the conductive polymer material may be mA %, satisfying the relationship of:




0.2
≤




Cap
C

-
Cap

Cap

×

m
C

/

m
A


≤
5.

公开(公告)号：US20230207823A1

公开(公告)日：2023-06-29

申请号：US18079008

申请日：2022-12-12

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Hong WANG ,  Bin YAO ,  Ying HUANG ,  Jiang LIU

IPC: H01M4/62 ,  H01M4/583

CPC classification number: H01M4/624 ,  H01M4/583 ,  H01M2004/027

Abstract: This application provides a secondary battery, including a negative electrode plate, where the negative electrode plate may include: a negative electrode current collector; a first negative electrode film layer disposed on at least one surface of the negative electrode current collector, where the first negative electrode film layer may include a first negative electrode active material and a first conductive polymer, a mass percentage of the first conductive polymer in the first negative electrode film layer is recorded as A, and A≤6%; and a second negative electrode film layer disposed on a surface of the first negative electrode film layer, where the second negative electrode film layer may include a second negative electrode active material and a second conductive polymer, and a mass percentage of the second conductive polymer in the second negative electrode film layer is recorded as B; where the negative electrode plate may satisfy A>B.