LINEAR CARBONATE AND PREPARATION METHOD THEREFOR

WIPO Patent Application WO/2023/124348

A1

The present invention relates to the technical field of chemical engineering, and in particular, to a linear carbonate and a preparation method therefor. The linear carbonate comprises one or more of compounds represented by structural formula 1, wherein R1 and R2 are respectively selected from one of alkyl groups containing 1-4 carbon atoms; the hydroxyl concentration of the linear carbonate is not greater than 100 ppm, and after a solution prepared from the linear carbonate and lithium hexafluorophosphate and having a concentration of 1 mol/L is sealed and stored for 30 days at a constant temperature of 25°C, then a free acid conversion rate is less than 1.2. According to the present invention, the hydroxyl concentration in the linear carbonate is controlled to reduce an acidity conversion rate after lithium hexafluorophosphate is dissolved, so that when the linear carbonate is used as an electrolyte solvent, the energy density and the discharge capacity of a battery can be improved, the safety performance of the battery can be better improved, and the service life of the battery can be prolonged.

KANG YUANYUAN (CN)
TU PENGCHENG (CN)
ZOU XIANSHUAI (CN)
TANG XIWU (CN)
CHEN SENWEI (CN)

PCT/CN2022/123773

July 06, 2023

October 08, 2022

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SHENZHEN CAPCHEM TECHNOLOGY CO LTD (CN)

C07C68/08; C07C68/065; C07C69/96

CN109439447A	2019-03-08
CN108496272A	2018-09-04
CN107501096A	2017-12-22
CN111454152A	2020-07-28
CN111704547A	2020-09-25
US4691041A	1987-09-01
CN113754540A	2021-12-07
CN111704545A	2020-09-25
GB196284200A

SHENZHEN GHZF INTELLECTUAL PROPERTY AGENCY (GENERAL PARTNERSHIP) (CN)

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