Dual chamber pseudo-capacitor for fuel addition and method for producing same

A technology of adding fuel and pseudocapacitors, which is applied in the field of electrochemistry, can solve the problems of low discharge efficiency and low energy density of single-chamber pseudocapacitors, and achieve the effects of reducing mass transfer resistance, easy recycling and regeneration, and simple treatment

Active Publication Date: 2017-06-27
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the shortcomings of low energy density and low discharge efficiency of single-chamber pseudocapacitors in the prior art, the present invention provides a fuel-added double-chamber pseudocapacitor and its preparation method

Method used

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  • Dual chamber pseudo-capacitor for fuel addition and method for producing same
  • Dual chamber pseudo-capacitor for fuel addition and method for producing same
  • Dual chamber pseudo-capacitor for fuel addition and method for producing same

Examples

Experimental program
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Effect test

Embodiment 1

[0042] A preparation method of a fuel-added double-chamber pseudocapacitor, comprising the steps of:

[0043] S1. Prepare aniline and drop it into dilute sulfuric acid to obtain a mixed solution. The concentration of sulfuric acid in the mixed solution is 1-2mol / L, and the concentration of aniline is 0.05-0.25mol / L. Arrange the carbon fibers after degreasing with acetone in the above mixed solution In, the composite material of carbon fiber cloth loaded with conductive polyaniline was prepared by cyclic voltammetry, and the electrode material containing conductive polyaniline was obtained;

[0044] Specifically, the three-electrode cyclic voltammetry electrodeposition method is adopted, carbon fiber cloth is used as the working electrode, the counter electrode is platinum, and the reference electrode is Ag / AgCl; the upper limit potential is 1.2V ~ 1.4V (vs. The potential is 0V~-0.2V (vs.Ag / AgCl); the scanning speed is 10mV / s~100mV / s, and the number of scanning circles is 10~30...

Embodiment 2

[0049] The fuel added to the positive electrode chamber in S2 of Example 1 was changed to copper chloride (the concentration of copper ions in the positive electrode chamber solution after addition was 0.1 mol / L), and the rest of the preparation conditions remained unchanged.

[0050] Carry out constant current charge and discharge test to the dual-chamber pseudocapacitor obtained in this embodiment, the results are shown in Figure 5 , at 2mA / cm 2 Under high discharge current, its discharge specific capacity is as high as 0.90F / cm 2 (214.29F / g), the area energy density is 80.22μWh / cm 2 , the corresponding mass specific energy density is 19.10Wh / kg.

Embodiment 3

[0052] The hydrochloric acid in the S2 of embodiment 1 is changed into the sulfuric acid of 2mol / L, the fuel that positive electrode chamber adds changes copper sulfate (the concentration of copper ion in positive electrode chamber solution after adding is 0.15mol / L), the corresponding negative electrode chamber The ferrous ion concentration of ferrous sulfate is also changed to 0.15mol / L, and all the other preparation conditions are unchanged.

[0053] Carry out constant current charge and discharge test to the dual-chamber pseudocapacitor obtained in this embodiment, at 2mA / cm 2 Under the high discharge current, its discharge specific capacity is as high as 1.32F / cm 2 (314.29F / g), the area energy density is 117.66μWh / cm 2 , the corresponding mass specific energy density is 28.01Wh / kg.

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Abstract

The invention relates to the field of electrochemistry, and more particularly to a dual chamber pseudo-capacitor for fuel addition and a method for producing the same. The dual chamber pseudo-capacitor comprises a positive electrode chamber, a negative electrode chamber and an anion exchange membrane. The positive and negative electrode chambers are separated by the anion exchange membrane. The positive and negative electrode chambers are respectively provided with electrodes therein containing conductive polymers. The positive and negative electrode chambers are filled with a mineral acid solution. Oxidizing fuel is added into the positive electrode chamber, and reductive fuel is added to the negative electrode chamber. During preparation, the conductive polymer obtained by cyclic voltammetry electrodeposition is used as an electrode and the anion exchange membrane as a separator, and the oxidizing fuel and reducing fuel are added into the mineral acid of the positive and negative electrode chambers, respectively. According to the invention, by the use of the doping property of the conductive polymer and the characteristic that the redox state of the conductive polymer can be regulated, a fuel cell is combined with a traditional single chamber pseudo-capacitor to obtain the dual chamber pseudo-capacitor, and the problems of low energy density and discharge efficiency of the traditional single-chamber pseudo-capacitor are solved.

Description

technical field [0001] The invention belongs to the field of electrochemistry, and in particular relates to a fuel-added double-chamber pseudocapacitor and a preparation method thereof. Background technique [0002] In 1996, Professor R.E. Smalley, winner of the Nobel Prize in Chemistry, proposed that energy and the environment are the two most important issues facing the world in the next fifty years. With the increasing depletion and irreversibility of fossil energy sources such as coal, oil, and natural gas, as well as the storage and grid connection of unstable energy sources such as wind energy, water energy, and solar energy, human beings urgently need to develop a green, environmentally friendly, large-capacity, and high-efficiency Energy-dense electrochemical energy storage devices. The Ragone diagram shows three conventional electrochemical devices, namely pseudocapacitors, lithium-ion batteries and fuel cells. Among them, the energy density of the fuel cell is as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/48H01G11/24H01G11/52H01G11/84
CPCY02E60/13H01G11/48H01G11/24H01G11/52H01G11/84
Inventor 郭芬范宝安张春桃雷杨
Owner WUHAN UNIV OF SCI & TECH
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