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.