公开(公告)号：US20210119219A1

公开(公告)日：2021-04-22

申请号：US17112775

申请日：2020-12-04

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Xin Liu ,  Mingling Li ,  Jia Peng ,  Qisen Huang ,  Chengdu Liang

IPC: H01M4/66 ,  H01M10/0525

Abstract: This application discloses a negative current collector, a negative electrode plate, an electrochemical apparatus, a battery module, a battery pack, and a device. The negative current collector includes a support layer and a metal conductive layer that is disposed on at least one of two opposite surfaces of the support layer in a thickness direction of the support layer. A density of the support layer is less than a density of the metal conductive layer; and the density of the metal conductive layer is 8.0 g/cm3 to 8.96 g/cm3. A thickness D1 of the metal conductive layer is 300 nm≤D1≤2 μm. When a tensile strain of the negative current collector is 2.5%, a sheet resistance growth rate T of the metal conductive layer is T≤5%.

公开(公告)号：US11932959B2

公开(公告)日：2024-03-19

申请号：US17901101

申请日：2022-09-01

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Jia Peng ,  Mingling Li ,  Xin Liu ,  Qisen Huang

IPC: C25D3/38 ,  C25D17/10

CPC classification number: C25D3/38 ,  C25D17/10

Abstract: This application provides a copper plating solution for a composite current collector, including a leveling agent represented by a general formula (1)






where an anion X is F−, Cl−, or Br−;
R1, R2, and R3 are each independently selected from O or S; and
R4, R5, and R6 are each independently selected from hydrogen, a substituted or unsubstituted alkyl, a substituted or unsubstituted vinyl, a substituted or unsubstituted aryl, and a substituted or unsubstituted heteroaryl.

公开(公告)号：US20230352693A1

公开(公告)日：2023-11-02

申请号：US18325016

申请日：2023-05-29

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xin Liu ,  Qisen Huang ,  Mingling Li ,  Xianghui Liu ,  Cheng Li ,  Jia Peng ,  Chengdu Liang

IPC: H01M4/66 ,  H01M50/46 ,  H01M4/04

CPC classification number: H01M4/667 ,  H01M50/46 ,  H01M4/0404 ,  H01M2004/028

Abstract: A positive electrode current collector and a positive electrode plate, a battery, a battery module, a battery pack, and an apparatus including the positive electrode current collector are provided. In some embodiments, a positive electrode current collector is provided, including an organic support layer and an aluminum-based conductive layer disposed on at least one surface of the organic support layer, where the aluminum-based conductive layer contains Al and at least one modifying element selected from O, N, F, B, S, and P, an XPS spectrogram of the aluminum-based conductive layer with a surface passivation layer removed through etching has at least a first peak falling in a range of 70 eV to 73.5 eV and a second peak falling in a range of 73.5 eV to 78 eV, and a ratio x of peak intensity of the second peak to that of the first peak satisfies 0

公开(公告)号：US20230083168A1

公开(公告)日：2023-03-16

申请号：US18056248

申请日：2022-11-16

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xin Liu ,  Qisen Huang ,  Mingling Li ,  Xianghui Liu ,  Cheng Li ,  Jia Peng ,  Chengdu Liang

IPC: H01M4/66 ,  H01M4/04 ,  H01M50/46

Abstract: A positive electrode current collector and a positive electrode plate, a battery, a battery module, a battery pack, and an apparatus including the positive electrode current collector are provided. In some embodiments, a positive electrode current collector is provided, including an organic support layer and an aluminum-based conductive layer disposed on at least one surface of the organic support layer, where the aluminum-based conductive layer contains Al and at least one modifying element selected from O, N, F, B, S, and P, an XPS spectrogram of the aluminum-based conductive layer with a surface passivation layer removed through etching has at least a first peak falling in a range of 70 eV to 73.5 eV and a second peak falling in a range of 73.5 eV to 78 eV, and a ratio x of peak intensity of the second peak to that of the first peak satisfies 0

公开(公告)号：US20220085383A1

公开(公告)日：2022-03-17

申请号：US17535690

申请日：2021-11-26

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Xin LIU ,  Shiwen Wang ,  Qisen Huang ,  Cheng Li ,  Mingling Li ,  Jia Peng ,  Xianghui Liu

IPC: H01M4/66

Abstract: The present application discloses a negative electrode current collector, a negative electrode plate, an electrochemical device, and an apparatus. The negative electrode current collector includes a polymer material-based support layer and a copper-based conductive layer disposed on at least one surface of the support layer; wherein a thickness D1 of the copper-based conductive layer, a tensile strength T of the support layer, and a thickness D2 of the support layer satisfy a relational formula 0.01≤(300×D1)/(T×D2)≤0.5. The negative electrode current collector has relatively high mechanics and mechanical properties, good electrical conductivity and current collection performance and low weight, which can improve preparation yield of the negative electrode current collector, the negative electrode plate and the electrochemical device and their reliability during use, and is beneficial to enabling the electrochemical device to have relatively high electrochemical performance and gravimetric energy density.

公开(公告)号：US20210143440A1

公开(公告)日：2021-05-13

申请号：US17123268

申请日：2020-12-16

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Xin LIU ,  Qisen Huang ,  Shiwen Wang ,  Xianghui Liu ,  Jia Peng ,  Mingling Li ,  Changliang Sheng

IPC: H01M4/66 ,  H01M10/0525 ,  H01M10/0569 ,  H01M10/0567 ,  H01M4/587 ,  H01M4/58 ,  H01M4/133 ,  H01M4/136 ,  H01M4/62 ,  C07C317/12

Abstract: This application discloses a lithium-ion secondary battery. The lithium-ion secondary battery includes a positive electrode plate, a negative electrode plate, a separator, and an electrolytic solution. The positive electrode plate includes a positive electrode current collector and a positive active material layer disposed on a surface of the positive electrode current collector and containing a positive active material, and the negative electrode plate includes a negative electrode current collector and a negative active material layer disposed on a surface of the negative electrode current collector and containing a negative active material; wherein the positive active material includes lithium iron phosphate, and the negative active material includes graphite; and wherein the positive electrode current collector and/or the negative electrode current collector is a composite current collector, and the composite current collector includes an organic support layer and a conductive layer disposed on at least one surface of the organic support layer.