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A high-voltage resistant aqueous electrolyte and its application in high-voltage supercapacitors

A water-based electrolyte and supercapacitor technology, applied in the direction of hybrid capacitor electrolytes, etc., can solve the problems of poor conductivity, large internal resistance, and high viscosity, and achieve the effects of improving conductivity, reducing internal resistance, and reducing viscosity.

Active Publication Date: 2021-10-22
西安合容新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a high-pressure resistant water-based electrolyte, which solves the problems of high viscosity, poor conductivity and large internal resistance of the water-based electrolyte in the prior art

Method used

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  • A high-voltage resistant aqueous electrolyte and its application in high-voltage supercapacitors
  • A high-voltage resistant aqueous electrolyte and its application in high-voltage supercapacitors
  • A high-voltage resistant aqueous electrolyte and its application in high-voltage supercapacitors

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Embodiment 1

[0029] Mix lithium bistrifluoromethylsulfonyl imide and deionized water, and the mass molar concentration of lithium bistrifluoromethylsulfonyl imide in deionized water is 21mol / L. Then add a certain amount of propylene carbonate to the above solution, after stirring for 2 hours, then add a certain amount of 1-ethyl-3-methylimidazolium tetrafluoroborate ionic liquid into the above solution, and stir for 6 hours to obtain the required electrolyte. The mass fraction of propylene carbonate in the electrolyte is 42.2wt%, the mass fraction of bistrifluoromethanesulfonylimide lithium in the entire aqueous electrolyte is 42.2%, and the proportion of the ionic liquid in the electrolyte is 8.6wt%. The rest is water. The viscosity and conductivity of this electrolyte at 25°C are shown in Table 1.

[0030] Fully mix activated carbon, acetylene black, sodium carboxymethyl cellulose, and styrene-butadiene rubber in deionized water at a mass ratio of 85:10:2:3 to obtain activated carbon s...

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Abstract

The invention discloses a high-pressure resistant water-based electrolyte, which includes inorganic or organic salts, deionized water, ionic liquids, and organic solvents, wherein the mass fraction of the inorganic or organic salts in the entire electrolyte is 10.05-50wt%, and the ion The mass fraction of the liquid in the electrolyte is 5-20wt%, the mass fraction of the organic solvent is 30.8%-77.95wt%, and the rest is deionized water. The invention also discloses the application of a high-voltage resistant water electrolyte in a high-voltage supercapacitor. The invention solves the problems of high viscosity, poor conductivity and large internal resistance of the aqueous electrolyte in the prior art.

Description

technical field [0001] The invention belongs to the technical field of supercapacitors, and in particular relates to a high-voltage-resistant water-based electrolyte, and also relates to the application of the high-voltage-resistant water-based electrolyte in high-voltage supercapacitors. Background technique [0002] With the continuous depletion of fossil energy and the continuous deterioration of the environment in recent years, people's demand for new sustainable energy such as wind energy, solar energy, and tidal energy is increasing day by day. As a new type of energy storage device, supercapacitors have outstanding advantages such as high power density, long cycle life, and wide operating temperature range. [0003] The commonly used electrolytes for supercapacitors are organic electrolytes and aqueous electrolytes. Commercial organic electrolytes use acetonitrile or propylene carbonate as solvents, tetraethylammonium tetrafluoroborate (Et 4 NBF 4 ) or methyltrieth...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/62H01G11/60H01G11/64
CPCH01G11/60H01G11/62H01G11/64Y02E60/13
Inventor 李浩卢海李祥元
Owner 西安合容新能源科技有限公司