Title:
CYCLIC DISULFONIC ACID SILYL ESTER AND PREPARATION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2019/061831
Kind Code:
A1
Abstract:
The present invention discloses a cyclic disulfonic acid silyl ester with a structure as shown in structural formula (A). A preparation method therefor comprises steps of: reacting methylene disulfonic acid or a methylene disulfonate of general formula (I) with a dihydrocarbyl di-active functional group silane of general formula (II), a dihydrocarbyl cyclosiloxane of general formula (III), or a dihydrocarbyl cyclosilazane of general formula (IV) in a solvent at a specific molar ratio, controlling the temperature and time of the reaction, and separating and removing the solvent and by-products after completion of the reaction, to give the cyclic disulfonic acid silyl ester. The present invention adopts a special raw material selection and synthesis process design and prepares novel cyclic disulfonic acid silyl esters having different substituents, with the ability to effectively improve normal temperature and high temperature cycle performance and high temperature storage performance of lithium secondary batteries and reduce battery thickness expansion in high-temperature storage processes. The preparation method therefor has simple process steps and strong implementability, and the obtained product has high purity, with chromatographic purity of over 99%, and broad market prospects.
Inventors:
FU RENJUN (CN)
FAN WEIZHEN (CN)
FAN WEIZHEN (CN)
Application Number:
PCT/CN2017/115167
Publication Date:
April 04, 2019
Filing Date:
December 08, 2017
Export Citation:
Assignee:
CHANGSHU CHANGEL CHEMICAL CO LTD (CN)
GUANGZHOU TINCI MATERIALS TECH CO LTD (CN)
GUANGZHOU TINCI MATERIALS TECH CO LTD (CN)
International Classes:
C07F7/08; H01M10/0567
Foreign References:
| CN101197456A | 2008-06-11 |
Other References:
SARTORI, P. ET AL.: "Syntheses and Structure of 3,3-Diorgano-2,4-Dioxa-1,5-Dithia-1,1,5,5- Tetraoxide 3-Silacyclohexanes and -Heptanes", ZEITSCHRIFTFUER NATURFORSCHUNG, B: CHEMICAL SCIENCES, vol. 49, no. 3, 31 December 1994 (1994-12-31), pages 309 - 314
Attorney, Agent or Firm:
SUZHOU CHENGYI INTELLECTUAL PROPERTY AGENCY(SPECIAL GENERAL PARTNERSHIP) (CN)
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