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Electrolyte membrane and capacitor member

A technology for electrolyte membranes and devices, applied in the field of polymer materials, can solve problems such as low conductivity and limit the performance of energy storage devices, and achieve the effects of improved performance, high electrochemical stability, and high ionic conductivity

Inactive Publication Date: 2018-11-13
RESEARCH INSTITUTE OF TSINGHUA UNIVERSITY IN SHENZHEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the low conductivity of solid polymer electrolytes at room temperature limits the performance of energy storage devices.

Method used

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  • Electrolyte membrane and capacitor member
  • Electrolyte membrane and capacitor member
  • Electrolyte membrane and capacitor member

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0040] An embodiment of the present invention also provides a capacitive device, which includes the electrolyte membrane, a positive electrode, and a negative electrode. A double layer capacitor with good electrode-electrolyte contact can be obtained by placing a piece of the electrolyte membrane between the positive electrode and the negative electrode and pressing it sufficiently. The positive electrode or the negative electrode can be made by coating the slurry obtained by reacting activated carbon, polyvinylidene fluoride resin, carbon black, and N-methylpyrrolidone on a metal foil. The metal foil may include aluminum foil, copper foil, and the like. Specifically, taking aluminum foil as an example, the preparation method of the electrode may include: mixing activated carbon (AC), polyvinylidene fluoride resin, and carbon black (AB) in a mass ratio of 80:10:10 and adding N -Methylpyrrolidone, fully stirred until a uniform slurry is formed; the electrode slurry is scraped ...

Embodiment 1

[0053]Dissolve 15 g of lithium bistrifluoromethanesulfonylimide in 50 ml of deionized water to form a lithium bistrifluoromethanesulfonylimide solution, and dissolve 15 g of polydiallyldimethylammonium chloride in 50 ml of deionized Polydiallyldimethylammonium chloride solution is formed in water; the bistrifluoromethanesulfonylimide lithium solution is dropped into the polydiallyldimethylammonium chloride solution to form the first mixed solution Stir the first mixed solution until a white precipitate appears in the first mixed solution, and the white precipitate is ammonium polydiallyldimethyl bis-trifluoromethanesulfonimide; separate the first mixed solution solution and the white precipitate, and wash the white precipitate with deionized water to remove excess lithium chloride; dry the washed white precipitate at 100°C for 24 hours; obtain the white precipitate in the powder state after drying Precipitation, and stirring and dissolving the powder of 5 g of white precipitat...

Embodiment 2

[0056] Dissolve 15 g of lithium bistrifluoromethanesulfonylimide in 50 ml of deionized water to form a lithium bistrifluoromethanesulfonylimide solution, and dissolve 15 g of polydiallyldimethylammonium chloride in 50 ml of deionized Polydiallyldimethylammonium chloride solution is formed in water; the bistrifluoromethanesulfonylimide lithium solution is dropped into the polydiallyldimethylammonium chloride solution to form the first mixed solution Stir the first mixed solution until a white precipitate appears in the first mixed solution, and the white precipitate is ammonium polydiallyldimethyl bis-trifluoromethanesulfonimide; separate the first mixed solution solution and the white precipitate, and wash the white precipitate with deionized water to remove excess lithium chloride; dry the washed white precipitate at 110°C for 24 hours; obtain the white precipitate in the powder state after drying Precipitation, and stirring and dissolving the powder of 5 g of white precipita...

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Abstract

The present invention provides an electrolyte membrane obtained by reacting polydiallyldimethyl bistrifluoromethanesulfonimide ammonium with lithium bistrifluoromethanesulfonimide under predeterminedconditions and performing drying. The chemical formula of the polydiallyldimethyl bistrifluoromethanesulfonimide ammonium is (C8H16NN(CF3SO2)2)n, and the chemical formula of the lithium bistrifluoromethanesulfonimide is LiN(CF3SO2))2. The invention also provides a capacitive member. With the electrolyte membrane provided by the present invention, the performance of the energy storage device can beimproved.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to an electrolyte membrane and a capacitor device. Background technique [0002] This section is intended to provide a background or context for the implementation of the embodiments of the invention that are set forth in the claims and detailed description. The descriptions herein are not admitted to be prior art by inclusion in this section. [0003] In traditional energy storage devices, solid polymer electrolytes synthesized by polymers and metal salts are mostly used. Solid polymer electrolytes have the characteristics of high mechanical strength, low reactivity and good assembly. However, solid polymer electrolytes have low conductivity at room temperature, which limits the performance of energy storage devices. In recent years, flexible energy storage devices have received extensive attention and research due to their simple structure and deformable bending charac...

Claims

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Application Information

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IPC IPC(8): H01G11/56
CPCH01G11/56Y02E60/13
Inventor 檀满林郭震田勇符冬菊陈建军王晓伟张维丽李冬霜
Owner RESEARCH INSTITUTE OF TSINGHUA UNIVERSITY IN SHENZHEN