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Ionic liquid polymer, electrolyte and lithium battery

An ionic liquid, lithium-ion battery technology, applied in secondary batteries, circuits, electrical components, etc., can solve the problem of low conductivity of all-solid polymer electrolytes, and achieve good cycle performance, high ionic conductivity, and film-forming properties. Good results

Inactive Publication Date: 2016-11-09
SHANGHAI JIAO TONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] The purpose of the present invention is to solve the problem of low conductivity of the existing all-solid polymer electrolyte, and to provide a method for preparing an all-solid polymer electrolyte that can be used for lithium-ion batteries

Method used

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  • Ionic liquid polymer, electrolyte and lithium battery
  • Ionic liquid polymer, electrolyte and lithium battery
  • Ionic liquid polymer, electrolyte and lithium battery

Examples

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preparation example Construction

[0140] The preparation method of the electrolyte of the present invention is conventional, and those skilled in the art can directly deduce the specific method according to the description of the present invention combined with the prior art. In a preferred example of the present invention, the electrolyte can be prepared as follows:

[0141] (1) Mix one or several ionic liquids described in the present invention with one or more polymercapto compounds described in the present invention, and control alkenyl (1 mole of alkynyl is equivalent to 2 moles of alkenyl) and mercapto The molar ratio is 1:1, then add the photoinitiator of 0.1%-5.0% (preferably 0.1-2.0% by weight) by weight, and stir until the solid is completely dissolved; and

[0142] (2) Pour the solution obtained in step (1) into a tetrafluoroethylene mold or evenly spread it on the positive electrode sheet, control the thickness of the liquid to 0.2-2.0mm, and place it under 365nm ultraviolet light for 1-12 hours af...

Embodiment 1

[0169] Preparation of the positive electrode sheet: the weight ratio of 80% positive electrode active material battery grade LiFePO 4 , 10% binder polyvinylidene fluoride PVDF and 10% conductive agent acetylene black are dispersed in N-methylpyrrolidone, fully stirred until a viscous slurry is formed; the slurry is evenly coated on battery-grade aluminum foil, controlled Each square centimeter of aluminum foil contains about 1.5-2 mg of positive electrode active material. The solvent is dried at 80°C, cut into 14mm diameter discs, and then vacuum-dried at 120°C for 4 hours to obtain the positive electrode sheet.

[0170] 1-methyl-3-allyl imidazolium tetrafluoroborate (AMIm-BF4), 1,3-diallyl imidazolium tetrafluoroborate (DAIm-BF4) and tetrakis (3-mercapto Propionic acid) pentaerythritol ester (PETMP, Sigma-Aldrich company product) mixes in molar ratio 1.8:1.1:1.0, then adds the photoinitiator I-907 of 1.0% by weight and 5.0% Lithium Tetrafluoroborate, dark stirring, until the...

Embodiment 2

[0172] Preparation of the positive electrode sheet: the weight ratio of 80% positive electrode active material battery grade LiFePO 4 , 10% binder polyvinylidene fluoride PVDF and 10% conductive agent acetylene black are dispersed in N-methylpyrrolidone, fully stirred until a viscous slurry is formed; the slurry is evenly coated on battery-grade aluminum foil, controlled Each square centimeter of aluminum foil contains about 1.5-2 mg of positive electrode active material, and the solvent is dried at 80° C., and then vacuum-dried at 120° C. for 4 hours.

[0173] 1-methyl-3-allyl imidazolium bistrifluoromethanesulfonimide salt (AMIm-TFSI), 1,3-diallyl imidazolium bistrifluoromethanesulfonylimide salt (DAIm- TFSI) and tetrakis (3-mercaptopropionic acid) pentaerythritol ester (PETMP) are mixed in a molar ratio of 1.9:1.05:1.0, then add 2.0% benzoin ethyl ether and 16.7% lithium bistrifluoromethanesulfonylimide (LiTFSI , Shanghai McLean Biochemical Technology Co., Ltd.), and stir ...

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Abstract

The invention provides an ionic liquid polymer, an electrolyte and a lithium battery, and provides a polymer. The polymer is prepared from an ionic liquid as shown in a formula (1) and a multi-mercapto compound as shown in a formula (2) under ultraviolet light irradiation through a sulfur-alkene / alkyne click reaction. The formulas are as shown in the specification.

Description

technical field [0001] The invention relates to an ionic liquid polymer, an electrolyte containing the ionic liquid polymer and a lithium battery containing the electrolyte, in particular to an all-solid polymer electrolyte and a lithium battery containing the electrolyte. Background technique [0002] In recent years, various power storage devices such as lithium-ion secondary batteries, lithium-ion capacitors, and air batteries have been actively developed. In particular, portable information terminals such as mobile phones, smartphones, and notebook personal computers, electronic equipment such as portable music players, digital cameras, medical equipment, hybrid electric vehicles (HEV), electric vehicles (EV) or plug-in hybrid vehicles With the development of the semiconductor industry such as next-generation clean energy vehicles such as (PHEV), the demand for lithium-ion secondary batteries with high output and high energy density has increased sharply. As a rechargeab...

Claims

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Application Information

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IPC IPC(8): H01M10/0565H01M10/0525
CPCH01M10/0525H01M10/0565Y02E60/10
Inventor 马晓东姜学松印杰锻治诚
Owner SHANGHAI JIAO TONG UNIV
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