A kind of aqueous compound electrolyte and its preparation method and application

An electrolyte and water-based technology, which is applied in the field of water-based composite electrolyte and its preparation, can solve the problems of low energy density of supercapacitors, and achieve the effects of simple and easy preparation process, improved energy density, and easy application

Active Publication Date: 2020-04-28
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the defect of low energy density of existing supercapacitors, the present invention provides a water system compound electrolyte with easy energy storage, high energy density and high Coulombic efficiency, its preparation method and its application in supercapacitors

Method used

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  • A kind of aqueous compound electrolyte and its preparation method and application

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Comparison scheme
Effect test

Embodiment 1

[0023] Sodium sulfate was added to deionized water to prepare a neutral electrolyte solution with a concentration of 0.5 mol / L, placed on a magnetic stirrer at a speed of 400 r / min, and stirred for 1 h.

[0024] Add copper chloride dihydrate solution to the neutral electrolyte to prepare a metal salt solution with a concentration of 0.005mol / L, place it on a magnetic stirrer at a speed of 400r / min, and stir for 1h.

[0025] Continue to add tetrabutylammonium bromide to the prepared solution to form a composite electrolyte solution with a concentration of 0.005mol / L, place it on a magnetic stirrer at a speed of 400r / min, and stir for 1h. Then the electrochemical test was carried out with activated carbon as the electrode material.

Embodiment 2

[0027] Sodium sulfate was added to deionized water to prepare a neutral electrolyte solution with a concentration of 0.5 mol / L, placed on a magnetic stirrer at a speed of 400 r / min, and stirred for 1 h.

[0028] Add copper chloride dihydrate solution to the neutral electrolyte to prepare a metal salt solution with a concentration of 0.5mol / L, place it on a magnetic stirrer at a speed of 400r / min, and stir for 1h.

[0029] Continue to add tetrabutylammonium bromide to the prepared solution to form a composite electrolyte solution with a concentration of 0.025mol / L, place it on a magnetic stirrer at a speed of 400r / min, and stir for 1h. Then the electrochemical test was carried out with activated carbon as the electrode material.

Embodiment 3

[0031] Add sodium sulfate to deionized water to prepare a neutral electrolyte solution with a concentration of 0.5 mol / L, place it on a magnetic stirrer at a speed of 400 r / min, and stir for 2 hours.

[0032] Add copper chloride dihydrate solution to the neutral electrolyte to prepare a metal salt solution with a concentration of 0.5 mol / L, place it on a magnetic stirrer at a speed of 400 r / min, and stir for 2 hours.

[0033]Continue to add tetrabutylammonium bromide to the prepared solution to prepare a compound electrolyte solution with a concentration of 0.1mol / L, place it on a magnetic stirrer at a speed of 400r / min, and stir for 2h. Then the electrochemical test was carried out with activated carbon as the electrode material.

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Abstract

The invention relates to a water-system complex-formulation electrolyte and a preparation method and application thereof, and solves the technical problem of low energy density of a present super capacitor. Sodium sulfate serves as a basic electrolyte, and a complex prepared by combining cupric chloride dihydrate providing metal ions and a surfactant tetrabutyl ammonium bromide serves as an electrolyte addictive. The invention provides the preparation method and application of the electrolyte. The water-system complex-formulation electrolyte and preparation method and application thereof can be widely applied to the field of electrochemistry.

Description

technical field [0001] The invention relates to the field of electrolytes for supercapacitors, in particular to a water-based composite electrolyte and its preparation method and application. Background technique [0002] Supercapacitors, also known as electrochemical capacitors, have two energy storage methods, namely electric double layer capacitor energy storage and pseudocapacitive energy storage. Different from traditional lithium batteries, supercapacitors have the advantages of safety, long-term cycle stability, and high power density, and thus have received more and more attention. [0003] The advantages of supercapacitors make them have good applications in power, transportation, consumer electronics, etc., but their shortcomings cannot be ignored. At present, the energy storage method of aqueous supercapacitor is electric double layer energy storage, which uses porous carbon material as electrode material and sulfuric acid as electrolyte. However, the capacitance...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/64H01G11/60H01G11/62H01G11/34H01G11/84
CPCH01G11/34H01G11/60H01G11/62H01G11/64H01G11/84Y02E60/13
Inventor 于运花杨佳怡丁晨峰兰金叻杨小平
Owner BEIJING UNIV OF CHEM TECH
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