公开(公告)号：US20220006122A1

公开(公告)日：2022-01-06

申请号：US17475704

申请日：2021-09-15

Applicant: Ningde Amperex Technology Limited

Inventor： Hui CUI ,  Wenqiang LI ,  Yali XIONG ,  Jianming ZHENG

IPC: H01M10/0567 ,  H01M10/0525 ,  H01M4/46

Abstract: An electrochemical device includes a positive electrode, a negative electrode, a separator, and an electrolyte, where the electrolyte contains a nitrile compound and transition metal ions, and satisfies 5≤A/B≤30000, where based on a molar mass of the electrolyte, a molar percentage of a cyano group in the electrolyte is A %, and based on a weight of the electrolyte, a weight percentage of the transition metal ions in the electrolyte is B %. The electrochemical device ensures that the cyano group and the transition metal ions in the electrolyte satisfy a specified relationship, to reduce leaching of the transition metal ions from a positive electrode active material and stabilize structural distortion of the positive electrode active material in a charge and discharge process, thereby improving high-temperature cycle performance and floating charge performance of the electrochemical device.

公开(公告)号：US20230361349A1

公开(公告)日：2023-11-09

申请号：US18315595

申请日：2023-05-11

Applicant: Ningde Amperex Technology Limited

Inventor： Yali XIONG ,  Mingming GUAN ,  Rong WANG ,  Jianming ZHENG

IPC: H01M10/0567 ,  H01M10/0525 ,  H01M50/46

CPC classification number: H01M10/0567 ,  H01M10/0525 ,  H01M50/46 ,  H01M2300/0051 ,  H01M2220/30

Abstract: An electrolyte includes an organic solvent, a lithium salt and additives, in particular, the additives include a fluoroethylene carbonate and a P—N bond-containing compound, the P—N bond-containing compound having a structure shown in formula I; A mass percentage of the fluoroethylene carbonate in the electrolyte is a %, a mass percentage of the P—N bond-containing compound in the electrolyte is b %, and 0.1≤a/b≤200.

公开(公告)号：US20240106002A1

公开(公告)日：2024-03-28

申请号：US18384935

申请日：2023-10-30

Applicant: Ningde Amperex Technology Limited

Inventor： Wenqiang LI ,  Yali XIONG ,  Junfei LIU ,  Lilan ZHANG

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

CPC classification number: H01M10/0569 ,  H01M4/525 ,  H01M10/0567 ,  H01M10/0568 ,  H01M10/052

Abstract: An electrolyte includes ethyl propionate, propyl propionate, ethylene carbonate, and propylene carbonate, where based on a total mass of the electrolyte, a mass percentage of ethyl propionate is a %, a mass percentage of propyl propionate is b %, a mass percentage of ethylene carbonate is c %, and a mass percentage of propylene carbonate is d %, where 20≤a+b≤50, 0

公开(公告)号：US20220059873A1

公开(公告)日：2022-02-24

申请号：US17460926

申请日：2021-08-30

Applicant: Ningde Amperex Technology Limited

Inventor： Yali XIONG ,  Wenqiang LI ,  Mingming GUAN ,  Jianming ZHENG

IPC: H01M10/0569 ,  H01M10/0567 ,  C07D207/46 ,  C07C255/04 ,  C07C255/16 ,  C07C255/05 ,  C07C309/06 ,  C07D327/10

Abstract: An electrolyte includes a compound of formula 1: R1 and R2 are each independently selected from H, halogen atom, a substituted or unsubstituted C1-10 alkyl group, a substituted or unsubstituted C3-10 cycloalkyl group, a substituted or unsubstituted C2-10 alkenyl group, a substituted or unsubstituted C2-10 alkynyl group, a substituted or unsubstituted C1-10 alkoxy group, a substituted or unsubstituted C6-10 aryl group, a substituted or unsubstituted C3-10 heteroaryl group, or any combination thereof. R is selected from a substituted or unsubstituted C1-10 alkyl group, a substituted or unsubstituted C3-10 cycloalkyl group, a substituted or unsubstituted C2-10 alkenyl group, a substituted or unsubstituted C2-10 alkynyl group, a substituted or unsubstituted C1-10 alkoxy group, a substituted or unsubstituted C6-10 aryl group or a substituted or unsubstituted C3-10 heteroaryl group, a substituted or unsubstituted C3-10 heterocycloalkyl group, a butyrolactam group, or any combination thereof.