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A kind of basic zinc carbonate supercapacitor electrode material and preparation method thereof

A technology for supercapacitors and electrode materials, which is applied in the manufacture of hybrid capacitor electrodes and hybrid/electric double-layer capacitors. It can solve the problems of high conductivity and achieve high specific capacitance, simple preparation methods, and environmentally friendly costs.

Active Publication Date: 2020-09-25
DALIAN JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The charge and discharge rate of carbon material electrode is high, but the specific capacitance is relatively small, and the metal oxide electrode has high specific capacitance but poor conductivity

Method used

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  • A kind of basic zinc carbonate supercapacitor electrode material and preparation method thereof
  • A kind of basic zinc carbonate supercapacitor electrode material and preparation method thereof
  • A kind of basic zinc carbonate supercapacitor electrode material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A basic zinc carbonate supercapacitor electrode material and a preparation method thereof are implemented according to the following steps.

[0027] (1) Soak nickel foam in hydrochloric acid with a concentration of 2mol / L for 10 minutes, remove the surface oxide film, wash with deionized water until neutral and dry;

[0028] (2) Take zinc nitrate, aluminum nitrate and urea to prepare a mixed solution. The concentration of zinc nitrate in the solution is 0.01mol / L, the concentration of aluminum nitrate is 0.002mol / L, and the molar concentration of urea is 0.06mol / L.

[0029] (3) Put the treated nickel foam into the mixed solution of step (2) and sonicate for 10 minutes. The volume ratio of nickel foam to the above mixed solution is 1:3.

[0030] (4) Put the mixed solution and nickel foam into the reactor for hydrothermal treatment; the volume ratio of nickel foam to etching solution is 1:3, the hydrothermal temperature is 120°C, and the hydrothermal time is 2 hours.

...

Embodiment 2

[0034] A basic zinc carbonate supercapacitor electrode material and preparation method thereof, the steps are the same as in Example 1, except that in step (4), the hydrothermal time is 8 hours. Figure 5 Cyclic voltammetry curves of the in situ growth basic zinc carbonate material on the surface of the prepared nickel foam at different scan rates. The test process is a three-electrode system. The saturated calomel electrode is used as the reference electrode, the platinum electrode is used as the counter electrode, and the prepared composite electrode is used as the working electrode. The electrolyte is 6M KOH. When the scanning speed is 50mV / s, the specific capacitance Up to 1100F / g.

Embodiment 3

[0036] A basic zinc carbonate supercapacitor electrode material and a preparation method thereof, the steps are the same as in Example 1, except that in step (4), the hydrothermal time is 12 hours.

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Abstract

The invention discloses an alkaline zinc carbonate supercapacitor electrode material and a preparation method thereof; the method comprises the following steps of (1) carrying out acid washing on foamed nickel to remove a surface oxidation film; performing washing by deionized water to be neutral and carrying out drying; (2) performing mixing on zinc nitrate, aluminum nitrate and urea to obtain amixed solution, wherein the molar concentration of urea in the solution is 0.05-0.15 mol / L; the molar ratio of zinc nitrate to aluminum nitrate is 5-1:1, and the molar ratio of urea to the total amount of zinc nitrate and aluminum nitrate is 5-2:1; (3) putting the treated foamed nickel into the mixed solution obtained in the step (2), and carrying out ultrasonic treatment; (4) putting the mixed solution and the foamed nickel into a reaction kettle to be subjected to hydrothermal treatment, wherein the hydrothermal temperature is 100-140 DEG C, and the hydrothermal time is 1-20 hours; and (5) after the hydrothermal reaction is completed, performing cooling, taking out the foamed nickel, and carrying out washing and drying. The preparation method disclosed by the invention is simple, environment-friendly and low in cost, and large-scale production can be realized easily.

Description

technical field [0001] The invention relates to a basic zinc carbonate supercapacitor electrode material and a preparation method thereof. Background technique [0002] Energy storage system is an important link in power grid peak regulation and new energy generation. The continuous depletion of fossil fuels has further stimulated the research on effective storage of solar and wind energy. Supercapacitors have attracted extensive attention due to their high specific power, fast charge / discharge, and long cycle life. [0003] Supercapacitor electrode materials include carbon-based materials, metal oxides and their composite materials. The charge and discharge rate of the carbon material electrode is high, but the specific capacitance is relatively small, and the metal oxide electrode has a high specific capacitance but poor conductivity. On the other hand, the usual supercapacitor electrodes are composed of active materials, conductive materials and binders. The internal re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/24H01G11/30H01G11/86
CPCH01G11/24H01G11/30H01G11/86Y02E60/13
Inventor 朱少敏徐冰李准赵宇王建海邓晗杨玉彬
Owner DALIAN JIAOTONG UNIVERSITY
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