公开(公告)号：US20220336855A1

公开(公告)日：2022-10-20

申请号：US17709650

申请日：2022-03-31

Applicant: Ningde Amperex Technology Limited

Inventor： Hui CUI ,  Xiang WANG ,  Chao TANG

IPC: H01M10/0566 ,  H01M10/0525 ,  H01M4/38

Abstract: An electrochemical device including an electrolyte. The electrolyte includes a non-fluorinated cyclic carbonate and an ether multi-nitrile compound. The non-fluorinated cyclic carbonate includes ethylene carbonate. Based on a mass of the electrolyte, a content of the ethylene carbonate is X %, and a content of the ether multi-nitrile compound is A %. The electrochemical device further includes a positive electrode. The positive electrode includes a positive electrode active material layer and a positive current collector. The positive electrode active material layer includes a positive electrode active material. The positive electrode active material includes an element M. The element M includes at least one of Al, Mg, Ti, Zr, or W. Based on a mass of the positive electrode active material, a content of the element M is C ppm, 1000≤C≤22000, X+A≤15, and 133≤C/A≤22000.

公开(公告)号：US20220223915A1

公开(公告)日：2022-07-14

申请号：US17708622

申请日：2022-03-30

Applicant: Ningde Amperex Technology Limited

Inventor： ShuiRong ZHANG ,  Xiao YUAN ,  Lilan ZHANG ,  Chao TANG

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

Abstract: An electrolyte including a dinitrile compound, a multi-nitrile compound with more than 2 cyano groups, and a boron-containing lithium salt. Based on a total weight of the electrolyte, a content of the dinitrile compound is A %, a content of the multi-nitrile compound is B %, and a content of the boron-containing lithium salt is C %, and 0≤(A/B)−C+1≤11. The cycle performance of the electrochemical device including the electrolyte is improved at a high temperature and in a high state of charge.

公开(公告)号：US20210408600A1

公开(公告)日：2021-12-30

申请号：US16770783

申请日：2019-12-24

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Hui CUI ,  Shuirong ZHANG ,  Chao TANG ,  Jianming ZHENG

IPC: H01M10/0568 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0569 ,  H01M4/131 ,  H01M4/525 ,  H01M4/66 ,  H01M50/491 ,  H01M50/417

Abstract: An electrolyte includes at least one of a compound of Formula I, a compound of Formula II or a compound of Formula III; and a compound of Formula IV; where, R11, R12, R13, R21, R22, R31, R32, R33 and R34 are independently selected from H, halo, cyano, substituted or unsubstituted C1-C10 alkyl, substituted or unsubstituted C2-C10 alkenyl, and substituted or unsubstituted C6-C12 aryl; R41 and R44 are independently selected from H, F, cyano, substituted or unsubstituted C1-C10 alkyl, substituted or unsubstituted C2-C10 alkenyl, substituted or unsubstituted C6-C12 aryl, Ra—(O—Rb), or (O—Rb); and R42 and R43 are independently selected from Rc—(O—Rd) or (O—Rd). Rb is selected from substituted or unsubstituted C1-C4 alkyl; Ra, Rc and Rd are independently selected from substituted or unsubstituted C1-C4 alkylene, C2-C5 alkenylene, or C6-C12 aryl.

公开(公告)号：US20210408595A1

公开(公告)日：2021-12-30

申请号：US16962777

申请日：2019-12-26

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

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

IPC: H01M10/0567 ,  H01M10/0525 ,  H01M10/0568 ,  H01M10/0569 ,  C07D327/00 ,  H01M4/36 ,  H01M4/583 ,  H01M4/133

Abstract: An electrochemical device including a positive electrode, a negative electrode and an electrolyte, wherein the negative electrode comprises a negative electrode active material layer, including a negative electrode active material, wherein the negative electrode active material includes a silicon-containing compound; and the negative electrode active material further includes, on the surface, a protective layer including a compound having an S═O bond.

公开(公告)号：US20210234196A1

公开(公告)日：2021-07-29

申请号：US16652390

申请日：2020-01-20

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Xiexue PENG ,  Jiqiong LIU ,  Junfei LIU ,  Chao TANG

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

Abstract: The present application relates to an electrolytic solution and an electrochemical device comprising the electrolytic solution. The electrolytic solution comprises a carbonate compound having a silicon-containing functional group, so as to significantly improve the overcharge performance and high-temperature storage performance of an electrochemical device using the electrolytic solution.

公开(公告)号：US20190214680A1

公开(公告)日：2019-07-11

申请号：US16131317

申请日：2018-09-14

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Xiangkun BO ,  Shuirong ZHANG ,  Chao TANG ,  Juan MA

IPC: H01M10/0567 ,  H01M10/0525

Abstract: The present application provides an electrolytic solution, comprising: a carbonate compound of the formula (I), wherein R1, R2, R3 and R4 are each independently selected from hydrogen or halogen, and at least one of R1, R2, R3 and R4 is halogen; a carbonate compound of the formula (II), wherein R5 and R6 are each independently selected from hydrogen, halogen, (C1-C10)alkyl, (C1-C10)haloalkyl, (C1-C10)alkoxy or (C1-C10)haloalkoxy, and at least one of R5 and R6 is (C1-C10)haloalkyl or (C1-C10)haloalkoxy; and a nitrile compound, the nitrile compound being selected from the group consisting of a dinitrile compound of the formula (III), a dinitrile compound of the formula (IV), a trinitrile compound of the formula (V), and a combination thereof: where x is a positive integer from 1 to 10, and y is a positive integer from 2 to 10.

公开(公告)号：US20250105356A1

公开(公告)日：2025-03-27

申请号：US18975212

申请日：2024-12-10

Applicant: Ningde Amperex Technology Limited

Inventor： Xiexue PENG ,  Junhua JIAN ,  Chao TANG

IPC: H01M10/0567 ,  C07C255/05 ,  H01M10/0525

Abstract: An electrolyte solution includes a compound represented by Formula I: where m, n, k, and x are each independently selected from 1, 2, or 3; R11 and R12 are each independently selected from hydrogen, halogen, substituted or unsubstituted C1 to C3 alkyl, substituted or unsubstituted C2 to C4 alkenyl, substituted or unsubstituted C2 to C4 alkynyl, or substituted or unsubstituted C6 to C10 aryl, wherein when substituted, a substituent is independently selected from halogen. The multi-cyano (—CN) compound represented by Formula I is introduced into the electrolyte solution, so that the multi-cyano group can stabilize a transition metal in a positive active material and protect a positive electrode interface. The compound represented by Formula I can also be reduced at a negative electrode to protect a negative electrode interface and play a role in suppressing continuous decomposition of the electrolyte solution and suppressing gas production.

公开(公告)号：US20240332620A1

公开(公告)日：2024-10-03

申请号：US18621143

申请日：2024-03-29

Applicant: Ningde Amperex Technology Limited

Inventor： Shan ZHANG ,  Jianyu LIU ,  Lanjie JIANG ,  Chao TANG

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

CPC classification number: H01M10/0567 ,  H01M10/0525 ,  H01M10/0568 ,  H01M2300/0025

Abstract: An electrochemical apparatus includes a positive electrode plate and an electrolyte. The positive electrode plate includes a positive electrode current collector and a positive electrode material layer disposed on at least one surface of the positive electrode current collector, the positive electrode material layer includes a positive electrode active material, and the positive electrode active material contains cobalt and nickel, where based on a mass of the positive electrode active material, a mass percentage of the nickel is B %, where 0.05≤B≤20. The electrolyte includes lithium bis(oxalato) borate and 1,3,6-hexanetricarbonitrile, where based on a mass of the electrolyte, a mass percentage of the lithium bis(oxalato) borate is C % and a mass percentage of the 1,3,6-hexanetricarbonitrile is D %. The electrochemical apparatus satisfies 0.1≤(C+D)/B≤23.

公开(公告)号：US20240250304A1

公开(公告)日：2024-07-25

申请号：US18619623

申请日：2024-03-28

Applicant: Ningde Amperex Technology Limited

Inventor： Xiang WANG ,  Rui WANG ,  Chao TANG

IPC: H01M10/0567 ,  C07C69/02 ,  C07C69/14 ,  C07C255/04 ,  C07C255/05 ,  H01M10/0525 ,  H01M10/0587

CPC classification number: H01M10/0567 ,  C07C69/02 ,  C07C69/14 ,  C07C255/04 ,  C07C255/05 ,  H01M10/0525 ,  H01M10/0587 ,  H01M2300/0025

Abstract: An electrochemical apparatus includes an electrolyte, where the electrolyte includes a carboxylate compound and fluoroethylene carbonate (FEC). Based on a total weight of the electrolyte, percentages of the carboxylate compound and FEC are w1 and w2 respectively, where 5%≤w1≤60%, 2%≤w2≤12%, and 2≤w1/w2≤20. The electrochemical apparatus delivers excellent fast charging performance and high-temperature interval cycle performance.

公开(公告)号：US20240047749A1

公开(公告)日：2024-02-08

申请号：US18374786

申请日：2023-09-29

Applicant: Ningde Amperex Technology Limited

Inventor： Junfei LIU ,  Chao TANG

IPC: H01M10/0567 ,  H01M10/0525 ,  H01M10/0568 ,  H01M4/36

CPC classification number: H01M10/0567 ,  H01M10/0525 ,  H01M10/0568 ,  H01M4/366 ,  H01M2004/027

Abstract: An electrochemical device includes a negative electrode and an electrolytic solution. The negative electrode includes a negative current collector and a negative active material layer disposed on at least one surface of the negative current collector. The negative active material layer includes a first region and a second region. A thickness of any position of the first region is less than an average thickness of the second region. The electrolytic solution includes a salt containing a P—O bond, and the salt accounts for a given content. The electrochemical device according to this application achieves excellent cycle performance.