公开(公告)号：US20230212108A1

公开(公告)日：2023-07-06

申请号：US18080682

申请日：2022-12-13

Applicant: SHENZHEN CAPCHEM TECHNOLOGY CO., LTD.

Inventor： YUANYUAN KANG ,  PENGCHENG TU ,  XIANSHUAI ZOU ,  XIWU TANG ,  SENWEI CHEN

IPC: C07C69/96

CPC classification number: C07C69/96

Abstract: The present invention relates to the technical field of chemical engineering, and in particular to a linear carbonate and a preparation method thereof, which includes one or more of compounds of structural formula 1 below:




wherein R1 and R2 are respectively selected from one of alkyl groups containing 1˜4 carbon atoms;
a hydroxyl concentration of the linear carbonate is no more than 100 ppm, and a free acid conversion rate of a solution with a concentration of 1 mol/L as formulated from the linear carbonate and lithium hexafluorophosphate is less than 1.2 after storage under 25° C. for 30 days. An acidity conversion rate was reduced when lithium hexafluorophosphate is dissolved in the linear carbonate by controlling the hydroxyl concentration, the energy density, discharge capacity, safety performance and service life of a battery can be improved when it's electrolyte solution contains the linear carbonate.