公开(公告)号：US20230378462A1

公开(公告)日：2023-11-23

申请号：US18363989

申请日：2023-08-02

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xiang ZHOU ,  Yao JIANG ,  Jiang LIU ,  Baiqing LI

IPC: H01M4/58 ,  H01M4/36 ,  H01M4/525

CPC classification number: H01M4/5825 ,  H01M4/366 ,  H01M4/525 ,  H01M2004/028

Abstract: A positive electrode sheet, a secondary battery, a battery module, a battery pack and an electrical apparatus are described. The positive electrode sheet includes a positive electrode current collector and a positive electrode film layer arranged on at least one surface of the positive electrode current collector and having a single-layer or multi-layer structure. When the positive electrode film layer is of the single-layer structure, at least one positive electrode film layer comprises both a first positive electrode active material and a second positive electrode active material with a chemical formula of LiaAxMn1-yRyP1-zCzO4-nDn; and/or, when the positive electrode film layer is of the multi-layer structure, at least one layer of the at least one positive electrode film layer includes both a first and second positive electrode active material. The secondary battery made of the positive electrode sheet has high energy density and high battery cell rate performance.

公开(公告)号：US20230352663A1

公开(公告)日：2023-11-02

申请号：US18211591

申请日：2023-06-20

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xiang ZHOU ,  Jiang LIU ,  Baiqing LI ,  Yao JIANG ,  Xiaomei LIU

IPC: H01M4/36 ,  H01M4/505 ,  H01M4/58 ,  H01M4/583 ,  H01M4/525

CPC classification number: H01M4/366 ,  H01M4/505 ,  H01M4/5825 ,  H01M4/583 ,  H01M4/525 ,  H01M2004/028

Abstract: A positive electrode sheet may comprise a positive electrode current collector and a positive electrode film layer having a single-layer structure or a multi-layer structure provided on at least one surface thereof; when the positive electrode film layer is of a single-layer structure, at least one positive electrode film layer may comprise both a first positive electrode active material and a second positive electrode active material; and/or, when the positive electrode film layer is of a multi-layer structure, at least one layer of the at least one positive electrode film layer may comprise both a first positive electrode active material and a second positive electrode active material; the first positive electrode active material may comprises an inner core containing Li1+xMn1-yAyP1-zRzO4, a first coating layer containing pyrophosphate MP2O7 and phosphate XPO4 and covering the inner core, and a second coating layer containing carbon element and covering the first coating layer.

公开(公告)号：US20240322165A1

公开(公告)日：2024-09-26

申请号：US18669469

申请日：2024-05-20

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xiang ZHOU ,  Yao Jiang ,  Jiang Liu ,  Baiqing Li

IPC: H01M4/58 ,  H01M4/02 ,  H01M4/36 ,  H01M4/505 ,  H01M4/525 ,  H01M4/62 ,  H01M4/64 ,  H01M10/0525

CPC classification number: H01M4/5825 ,  H01M4/364 ,  H01M4/366 ,  H01M4/505 ,  H01M4/525 ,  H01M4/58 ,  H01M4/582 ,  H01M4/625 ,  H01M2004/021 ,  H01M2004/028 ,  H01M4/64 ,  H01M10/0525

Abstract: A positive electrode sheet, a secondary battery, a battery module, a battery pack and an electrical apparatus are described. The positive electrode sheet includes a positive electrode current collector and a positive electrode film layer arranged on at least one surface of the positive electrode current collector and having a single-layer or multi-layer structure. When the positive electrode film layer is of the single-layer structure, at least one positive electrode film layer comprises both a first positive electrode active material and a second positive electrode active material with a chemical formula of LiaAxMn1-yRyP1-zCzO4-nDn; and/or, when the positive electrode film layer is of the multi-layer structure, at least one layer of the at least one positive electrode film layer includes both a first and second positive electrode active material. The secondary battery made of the positive electrode sheet has high energy density and high battery cell rate performance.

公开(公告)号：US20240047657A1

公开(公告)日：2024-02-08

申请号：US18487266

申请日：2023-10-16

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xiang ZHOU ,  Baiqing LI ,  Jiang LIU ,  Yao JIANG ,  Xiaomei LIU

IPC: H01M4/36 ,  H01M4/505 ,  H01M4/525

CPC classification number: H01M4/366 ,  H01M4/505 ,  H01M4/525 ,  H01M2004/028

Abstract: A novel positive electrode sheet, a secondary battery, a battery module, a battery pack and an electrical apparatus are described. The positive electrode sheet includes a positive electrode current collector and a positive electrode film layer with a single-layer structure or a multi-layer structure. When the positive electrode film layer is a single-layer structure, at least one of the positive electrode film layers comprises a first positive electrode active material and a second positive electrode active material; and/or, when the positive electrode film layer is a multi-layer structure, at least one layer of at least one of the positive electrode film layers comprises a first positive electrode active material and a second positive electrode active materials. The first positive electrode active material includes an inner core, a first cladding layer comprising crystalline pyrophosphates, a second cladding layer comprising crystalline phosphate, and a third cladding layer.

公开(公告)号：US20200091558A1

公开(公告)日：2020-03-19

申请号：US16562114

申请日：2019-09-05

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xiang ZHOU ,  Xiaomei LIU ,  Shipeng LI ,  Jiang LIU ,  Guobao WANG

IPC: H01M10/0569 ,  H01M10/0525 ,  H01M4/133 ,  H01M4/587 ,  H01M4/136 ,  H01M4/58

Abstract: The present disclosure provides a lithium-ion battery comprising an electrode assembly, an electrolyte and a case. The electrolyte comprises a lithium salt and an organic solvent which comprises a cyclic ester, a mass of the cyclic ester is equal to or less than 10% of a total mass of the organic solvent. A negative electrode active material at least comprises a carbon-based negative electrode material which in the negative electrode film exists in a form of a pre-lithium-intercalation compound LiCx formed by lithiation with a lithium metal, 12≤x≤150; a capacity of the negative electrode active material per unit area/(a capacity of the positive electrode active material per unit area+a capacity of active lithium ions of the pre-lithium-intercalation compound LiCx which can be intercalated and deintercalated in the negative electrode film per unit area)≥1.10.

公开(公告)号：US20240304808A1

公开(公告)日：2024-09-12

申请号：US18669462

申请日：2024-05-20

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xiang ZHOU ,  Yao JIANG ,  Jiang LIU ,  Baiqing LI

IPC: H01M4/58 ,  H01M4/02 ,  H01M4/36 ,  H01M4/505 ,  H01M4/525 ,  H01M4/62 ,  H01M4/64 ,  H01M10/0525

CPC classification number: H01M4/5825 ,  H01M4/364 ,  H01M4/366 ,  H01M4/505 ,  H01M4/525 ,  H01M4/58 ,  H01M4/582 ,  H01M4/625 ,  H01M2004/021 ,  H01M2004/028 ,  H01M4/64 ,  H01M10/0525

Abstract: A positive electrode sheet, a secondary battery, a battery module, a battery pack and an electrical apparatus are described. The positive electrode sheet includes a positive electrode current collector and a positive electrode film layer arranged on at least one surface of the positive electrode current collector and having a single-layer or multi-layer structure. When the positive electrode film layer is of the single-layer structure, at least one positive electrode film layer comprises both a first positive electrode active material and a second positive electrode active material with a chemical formula of LiaAxMn1-yRyP1-zCzO4-nDn; and/or, when the positive electrode film layer is of the multi-layer structure, at least one layer of the at least one positive electrode film layer includes both a first and second positive electrode active material. The secondary battery made of the positive electrode sheet has high energy density and high battery cell rate performance.