Single-ion conductor polymer lithium salt and preparation method thereof

A conductor polymer, single-ion technology, which is used in the preparation of bisbenzenesulfonimide lithium-based single-ion polymer lithium salt, and the application field of polymer electrolytes, which can solve the problem of low ionic conductivity and lithium ion migration number. question

Active Publication Date: 2018-12-28
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem of low ion conductivity and lithium ion migration number at room temperature, the present invention designs a new type of alternating structure single-ion polymer lithium salt and proposes its preparation method

Method used

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  • Single-ion conductor polymer lithium salt and preparation method thereof
  • Single-ion conductor polymer lithium salt and preparation method thereof
  • Single-ion conductor polymer lithium salt and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The preparation of embodiment 1-styryl bissulfonylimide lithium salt and maleic anhydride alternating polymer P (STSSILi-alt-MA)

[0033]Pour the lithium salt monomer STSSILi and maleic anhydride (MA) into the polymerization tube according to the molar ratio of 1:1.2, add dimethyl sulfoxide (DMSO) to dissolve, add 0.1% (molar ratio) of azobisisobutyl Nitrile (AIBN). Put the polymerization tube into liquid nitrogen to cool it, carry out nitrogen gas-evacuation three times, seal the tube with an alcohol torch and put it in an oil bath at 60°C for 48 hours to react. After the reaction, the polymerization tube was opened to expose to the air. The DMSO solution of the polymer was precipitated three times in tetrahydrofuran to remove unreacted monomer.

Embodiment 2

[0034] The preparation of embodiment 2-styryl bissulfonylimide lithium salt and maleic anhydride alternating polymer P (STSSILi-alt-MA)

[0035] Pour the lithium salt monomer STSSILi and maleic anhydride (MA) into the polymerization tube according to the molar ratio of 1:1.05, add dimethyl sulfoxide (DMSO) to dissolve, add 0.2% (molar ratio) of azobisisobutyl Nitrile (AIBN). Put the polymerization tube into liquid nitrogen to cool it, carry out nitrogen gas-evacuation three times, seal the tube with an alcohol torch and put it in an oil bath at 80°C for 36 hours to react. After the reaction, the polymerization tube was opened to expose to the air. The DMSO solution of the polymer was precipitated three times in tetrahydrofuran to remove unreacted monomer.

Embodiment 3

[0036] Example 3 - Preparation of styryl bissulfonylimide lithium salt and maleic anhydride alternating polymer P (STSSILi-alt-MA) Lithium salt monomer STSSILi and maleic anhydride (MA) in a molar ratio of 1:1.2 Pour into a polymerization tube, add dimethyl sulfoxide (DMSO) to dissolve, and add 0.3% (molar ratio) of azobisisobutyronitrile (AIBN). Put the polymerization tube into liquid nitrogen to cool it, carry out nitrogen gas-evacuation three times, seal the tube with an alcohol torch and put it in an oil bath at 70°C for 40 hours to react. After the reaction, the polymerization tube was opened to expose to the air. The DMSO solution of the polymer was precipitated three times in tetrahydrofuran to remove unreacted monomer.

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Abstract

The invention discloses single-ion conductor polymer lithium salt and a preparation method thereof. The single-ion conductor polymer lithium salt is prepared by simple free radical polymerization of astyrene disulfonic imide lithium salt monomer and maleic anhydride. Firstly, p-styrene sulfonyl chloride and benzene sulfonamide generates styrene disulfonic imide under triethylamine and 4-dimethylamino pyridine and are neutralized with lithium hydroxide to obtain the styrene disulfonic imide lithium salt monomer. Azodiisobutyronitrile is taken as an initiator, styrene disulfonic imide lithium and maleic anhydride are bonded together through a simple free radical copolymerization mode to form an alternating polymer of vinyl benzene sulfonylimide lithium salt and maleic anhydride. The single-ion conductor polymer lithium salt and the preparation method thereof have the advantages that a high dielectric constant unit of the maleic anhydride is introduced into an existing polymer lithium salt framework or chain segment, and is a pathway of effectively increasing the concentration of 'free' lithium ions, improving the conductivity and transference number of room-temperature lithium ionsthrough the interaction of the maleic anhydride with lithium ions and the promotion of the dissociation of the lithium ions.

Description

technical field [0001] The present invention relates to the preparation of a novel lithium single-ion polymer lithium salt, specifically the preparation of a bisbenzenesulfonimide lithium-based single-ion polymer lithium salt with an alternating structure and its application in polymer electrolytes application. Background technique [0002] Compared with the traditional liquid electrolyte lithium secondary battery, the all-solid lithium battery based on organic polymer electrolyte has a large room for improvement in battery energy density, operating temperature range, cycle life, etc., and is an important aspect of lithium secondary battery. Direction of development. The organic all-solid-state polymer electrolyte system not only has many advantages such as light weight, good viscoelasticity, easy film formation, wide electrochemical window, and good chemical stability, but also can well suppress the dendrite problem of lithium metal batteries. Lithium batteries using orga...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F222/06C08F212/14H01M10/0565
CPCC08F222/06H01M10/0565C08F212/14Y02E60/10
Inventor 封伟曹晨李瑀冯奕钰
Owner TIANJIN UNIV
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