公开(公告)号：US20250070245A1

公开(公告)日：2025-02-27

申请号：US18622931

申请日：2024-03-30

Applicant: Ningde Amperex Technology Limited

Inventor： Xin CAI ,  Hui CUI ,  Chao TANG

IPC: H01M10/0567 ,  H01M4/02 ,  H01M4/587 ,  H01M10/0525

Abstract: An electrolyte of the electrochemical apparatus includes a linear carboxylate compound and a dinitrile compound. Based on total mass of the electrolyte, a mass percentage a of the linear carboxylate compound is 20% to 70% and a mass percentage b of the dinitrile compound is 0.01% to 7%; a bonding force between a negative electrode active material layer and a negative electrode current collector of a negative electrode plate is peeling strength, where the peeling strength F measured in N/m is 5 N/m to 20 N/m; and the mass percentage a of the linear carboxylate compound, the mass percentage b of the dinitrile compound, and the peeling strength F satisfy a relation 0.14≤(100b+F)/100a≤1.35.

公开(公告)号：US20240322234A1

公开(公告)日：2024-09-26

申请号：US18731804

申请日：2024-06-03

Applicant: Ningde Amperex Technology Limited

Inventor： Jianyu LIU ,  Hai LONG ,  Chao TANG

IPC: H01M10/0566 ,  H01M10/0525

CPC classification number: H01M10/0566 ,  H01M10/0525 ,  H01M2300/0025

Abstract: An electrochemical device includes a positive electrode, a negative electrode, a separator, and an electrolyte solution. The electrolyte solution includes fluoroethylene carbonate and a trinitrile compound. Based on a mass of the electrolyte solution, a mass percent of the fluoroethylene carbonate is A %, satisfying: 4≤ A≤10, and a mass percent of the trinitrile compound is B %, satisfying: 1≤B≤3. A positive active material of a positive electrode includes a metal element M. The metal element M includes at least one of Ti, Mg, or Al. A content of the metal element M in the positive active material is C ppm. C and B satisfy: 7≤C×B/1000≤27.

公开(公告)号：US20240234815A1

公开(公告)日：2024-07-11

申请号：US18606708

申请日：2024-03-15

Applicant: Ningde Amperex Technology Limited

Inventor： Chunrui XU ,  Yanyan XU ,  Jianming ZHENG ,  Chao TANG

IPC: H01M10/0567 ,  H01M10/0569

CPC classification number: H01M10/0567 ,  H01M10/0569 ,  H01M2300/0034 ,  H01M2300/004

Abstract: An electrolytic solution, an electrochemical device containing the electrolytic solution, and an electronic device. The electrolytic solution includes ethylene carbonate, propylene carbonate, and fluoroethylene carbonate. Based on a mass of the electrolytic solution, a mass percent of the ethylene carbonate is a, a mass percent b of the propylene carbonate is 12% to 35%, a mass percent c of the fluoroethylene carbonate is 0.2% to 2.5%, and the electrolytic solution satisfies 0.1≤a/b≤0.75.

公开(公告)号：US20230231196A1

公开(公告)日：2023-07-20

申请号：US18098604

申请日：2023-01-18

Applicant: Ningde Amperex Technology Limited

Inventor： Xiexue PENG ,  Chao TANG

IPC: H01M10/0567 ,  H01M10/0568 ,  H01M10/0525

CPC classification number: H01M10/0567 ,  H01M10/0568 ,  H01M10/0525

Abstract: An electrolytic solution includes a compound represented by Formula I-A and a compound represented by Formula II-A. In Formula I-A, A11, A12, and A13 are each independently selected from Formula (I-A1) and Formula (I-A2). In Formula I-A, n is a positive integer from 1 to 8. When n>1, the plurality of A11 structures are identical or different. At least two of the A11, A12, or A13 are selected from I-A2. In Formula II-A, Q is independently selected from Formula (II-A1) and Formula (II-A2). In Formula II-A, m is 1 or 2. R11, R12, R13, R21, R22, and R23 are each independently selected from a covalent single bond, a substituted or unsubstituted C1 to C10 alkylidene and heterocyclyl, a substituted or unsubstituted C2 to C10 alkenyl and alkynyl, a substituted or unsubstituted C6 to C10 aryl, a substituted or unsubstituted C3 to C10 alicyclic hydrocarbyl, and a substituted or unsubstituted heteroatom-containing functional group, in which a substituent for substitution is halogen.

公开(公告)号：US20220271341A1

公开(公告)日：2022-08-25

申请号：US17709645

申请日：2022-03-31

Applicant: Ningde Amperex Technology Limited

Inventor： Shaoyun ZHOU ,  Chao TANG

IPC: H01M10/0569 ,  H01M10/0525 ,  H01M10/0568 ,  H01M10/0567

Abstract: An electrolyte including ethyl propionate and fluoroethylene carbonate, where based on a total weight of the electrolyte, a weight percentage of ethyl propionate is a%, and a weight percentage of fluoroethylene carbonate is b%, and 0

公开(公告)号：US20210408601A1

公开(公告)日：2021-12-30

申请号：US16961495

申请日：2019-12-26

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Chao TANG ,  Lilan ZHANG ,  Junfei LIU ,  Jianming ZHENG

IPC: H01M10/0568 ,  H01M10/0525 ,  H01M10/0569 ,  H01M10/0567 ,  C07C255/05 ,  C07D319/12

Abstract: An electrolyte includes diglycolic anhydride and a trinitrile compound, with which the cycle performance and the high-temperature stability under over-discharge conditions of lithium-ion batteries are significantly improved. The electrolyte includes a compound of Formula I; and at least one of a compound of Formula II or a compound of Formula III; R1, R2, R3 and R4 are each independently selected from hydrogen, halo, substituted or unsubstituted C1-C10 alkyl, substituted or unsubstituted C2-C10 alkenyl, substituted or unsubstituted C2-C10 alkynyl, substituted or unsubstituted C6-C12 aryl, substituted or unsubstituted C1-C10 alkoxy, or substituted or unsubstituted C6-C12 aryloxy, wherein when substituted, the substituent is halo, cyano, or C1-C10 alkyl; and a, d and f are each independently selected from an integer from 1 to 5, and b, c, e, g, h and i are each independently selected from an integer from 0 to 5.

公开(公告)号：US20200099101A1

公开(公告)日：2020-03-26

申请号：US16211537

申请日：2018-12-06

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Wenqiang LI ,  Shuirong ZHANG ,  Chao TANG

IPC: H01M10/0567 ,  H01M4/36 ,  H01M4/505 ,  H01M4/525 ,  H01M10/42

Abstract: The present application relates to an electrolytic solution and an electrochemical device containing the electrolytic solution. The electrolytic solution of the present invention comprises a compound having a —CN functional group, and is capable of significantly improving the floating-charge performance, the increased impedance accompanying the long-term cycle test, and the thermal impact performance of an electrochemical device using the electrolytic solution.

公开(公告)号：US20250023106A1

公开(公告)日：2025-01-16

申请号：US18899505

申请日：2024-09-27

Applicant: Ningde Amperex Technology Limited

Inventor： Hui CUI ,  Junfei LIU ,  Chao TANG ,  Junqiang HAN

IPC: H01M10/0569 ,  H01M4/02 ,  H01M4/525 ,  H01M10/0567 ,  H01M10/0568

Abstract: An electrochemical apparatus includes a positive electrode and an electrolyte. The electrolyte includes ethylene carbonate (EC), propylene carbonate (PC), and succinonitrile (SN). The positive electrode includes a positive electrode active material, where the positive electrode active material includes metal element A, and the metal element A includes at least one of the following elements: Mg, Zr, or Al. Based on a mass of the electrolyte, a mass percentage of SN is a %, a mass percentage of EC is b %, and a mass percentage of PC is c %, where k=b/c, 1.25≤k≤6, and a/k≥0.2. Based on a mass of the positive electrode active material, a mass percentage of the metal element A is x %, where 0.01≤x≤1. The foregoing electrochemical apparatus exhibits excellent high-temperature cycling performance and high-temperature interval cycling performance.

公开(公告)号：US20250023102A1

公开(公告)日：2025-01-16

申请号：US18901349

申请日：2024-09-30

Applicant: Ningde Amperex Technology Limited

Inventor： Junfei LIU ,  Disheng LAN ,  Chao TANG ,  Xiexue PENG

IPC: H01M10/0567 ,  H01M4/02 ,  H01M4/36 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  H01M10/0569

Abstract: An electrolyte includes fluoroethylene carbonate, where a percentage a of the fluoroethylene carbonate is 0.01% to 5% based on mass of the electrolyte; the positive electrode includes a positive electrode active material, where the positive electrode active material contains element Mn, and a percentage of the element Mn is greater than or equal to 15% based on mass of the positive electrode active material; and the positive electrode active material has a unit reaction area c measured in m2/cm2, where a and c satisfy the following relationship: 0.0006≤a/c≤6.25, and the unit reaction area is a product of a weight W of the positive electrode active material per unit area and a specific surface area BET of the positive electrode active material.

公开(公告)号：US20240363910A1

公开(公告)日：2024-10-31

申请号：US18768551

申请日：2024-07-10

Applicant: Ningde Amperex Technology Limited

Inventor： Lilan ZHANG ,  Chao TANG

IPC: H01M10/42 ,  H01M4/02 ,  H01M4/131 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0568

CPC classification number: H01M10/4235 ,  H01M4/131 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0568 ,  H01M2004/028 ,  H01M2300/0025

Abstract: An electrochemical device includes a positive electrode and an electrolyte. The positive electrode includes a positive current collector and a positive electrode material layer disposed on at least one surface of the positive current collector. After the electrochemical device is charged and discharged for a first cycle, a number of pores in any one region of a 20 μm×20 μm size on the positive current collector is X, where X is an integer ranging from 0 to 10. The electrolyte includes a fluorine-containing sulfonyl imide salt and a fluorine-containing substance Y. Based on a mass of the electrolyte, a mass percent of the fluorine-containing sulfonyl imide salt is A %, and a mass percent of the fluorine-containing substance Y is B %. X, A, and B satisfy: 0≤AX/B≤450.