Method for improving specific capacitance of electric double-layer capacitor

An electric double layer capacitor and specific capacitance technology, applied in the field of capacitors, can solve the problems of low ionic conductivity, large equivalent internal resistance, low liquid absorption rate, etc. Effect

Active Publication Date: 2017-07-07
王馨瑜
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems in the prior art that the capacitor diaphragm has a low liquid absorption rate to the electrolyte, so that the equivalent internal resistance of the electric double-layer capacitor is relatively large, the ion conductivity is low, and the specific capacitance of the capacitor is low. Method for Specific Capacitance of Electric Double Layer Capacitors

Method used

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  • Method for improving specific capacitance of electric double-layer capacitor
  • Method for improving specific capacitance of electric double-layer capacitor
  • Method for improving specific capacitance of electric double-layer capacitor

Examples

Experimental program
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Embodiment 1

[0047] Step 1. Peel off the eggshell membrane from the eggshell, wash it, and cut it to a size of 1.2cm×1.2cm;

[0048] Step 2. Prepare the egg white-based gel electrolyte. The egg white-based gel electrolyte is composed of egg white, water and sodium chloride. The volume ratio of egg white to water is 8:2, and the concentration of sodium chloride is 1mol / L ;

[0049] Step 3. Put the cut eggshell membrane in the egg white-based gel electrolyte for 10 minutes to obtain the eggshell membrane that absorbs the egg white-based gel electrolyte, and wipe off the excess electrolyte on the surface of the eggshell membrane to obtain the egg white-based gel electrolyte , wherein the absorption rate of the eggshell membrane to the electrolyte is 27%;

[0050] Step 4: Assemble the egg white-based gel electrolyte and the rice husk-based activated carbon electrode (1cm×1cm) in a sandwich structure, use tin foil as the current collector, and use scotch tape as a simple packaging material to ...

Embodiment 2

[0055] Step 1. Peel off the eggshell membrane from the eggshell, wash it, and cut it to a size of 1.2cm×1.2cm;

[0056] Step 2. Prepare egg white-based gel electrolyte. The egg white-based gel electrolyte is composed of egg white, water and sodium chloride. The volume ratio of egg white to water is 10:0, and the concentration of sodium chloride is 1mol / L ;

[0057] Step 3. Put the cut eggshell membrane in the egg white-based gel electrolyte for 10 minutes to obtain the eggshell membrane that absorbs the egg white-based gel electrolyte, and wipe off the excess electrolyte on the surface of the eggshell membrane to obtain the egg white-based gel electrolyte , wherein the absorption rate of the eggshell membrane to the electrolyte is 19%;

[0058] Step 4: Assemble the egg white-based gel electrolyte and the rice husk-based activated carbon electrode (1cm×1cm) in a sandwich structure, use tin foil as the current collector, and use scotch tape as a simple packaging material to avo...

Embodiment 3

[0061] Step 1. Peel off the eggshell membrane from the eggshell, wash it, and cut it to a size of 1.2cm×1.2cm;

[0062] Step 2. Prepare the egg white-based gel electrolyte. The egg white-based gel electrolyte is composed of egg white, water and sodium chloride. The volume ratio of egg white to water is 1:9, and the concentration of sodium chloride is 1mol / L ;

[0063] Step 3. Put the cut eggshell membrane in the egg white-based gel electrolyte for 10 minutes to obtain the eggshell membrane that absorbs the egg white-based gel electrolyte, and wipe off the excess electrolyte on the surface of the eggshell membrane to obtain the egg white-based gel electrolyte , wherein the absorption rate of the eggshell membrane to the electrolyte is 11%;

[0064] Step 4. Assemble the electrolyte separator egg white-based gel electrolyte and rice husk-based activated carbon electrode (1cm×1cm) in a sandwich structure, use tin foil as the current collector, and use scotch tape as a simple pack...

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Abstract

The invention relates to a method for improving specific capacitance of an electric double-layer capacitor, belongs to the technical field of a capacitor and solves the problems that since liquid absorption rate of a capacitor diaphragm for electrolyte is low, equivalent internal resistance of the electric double-layer capacitor is large, ionic conductance is low and specific capacitance is low in the prior art. The method comprises the following steps: to begin with, peeling an eggshell membrane from an eggshell, cleaning and cutting the eggshell membrane to a required size; then, preparing an egg white base gel electrolyte solution formed by egg white, water and neutral salt; placing the cut eggshell membrane into the egg white base gel electrolyte solution for more than 10 mins; wiping unnecessary electrolyte solution on the surface of the eggshell membrane to obtain an egg white base gel electrolyte; and assembling the egg white gel electrolyte into an electric double-layer capacitor. The method is simple and environment friendly; and by utilizing affinity between the egg white and the eggshell membrane as well as gel property of the egg white in increasing viscosity of the electrolyte, the eggshell membrane is allowed to absorb larger amount of electrolyte solution, so that internal resistance of the capacitor is reduced, ionic conduction is improved, and specific capacitance of the capacitor is improved.

Description

technical field [0001] The invention belongs to the technical field of capacitors, and in particular relates to a method for improving the specific capacitance of an electric double layer capacitor. Background technique [0002] Electrical Double-Layer Capacitor (Electrical Double-Layer Capacitor), also known as supercapacitor, is a new type of energy storage device, which has the characteristics of short charging time, long service life, good temperature characteristics, energy saving and environmental protection. It has important applications in the fields of intelligent electronic products, electric tools, hybrid electric vehicles and high-power pulse equipment. [0003] As an important part of electric double layer capacitors, the electrolyte has a great influence on the storage performance of electric double layer capacitors, which determines the equivalent internal resistance, working voltage range, storage capacity, working temperature and working environment of the c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/52H01G11/56
Inventor 王馨瑜
Owner 王馨瑜
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