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Preparation method for electrode MnO2@Ni-Al LDH composite material of super capacitor

A technology of supercapacitors and composite materials, used in the manufacture of hybrid capacitor electrodes and hybrid/electric double-layer capacitors, etc., can solve the problems of poor stability of modified electrodes, and achieve improved electrochemical performance, uniform size, and short modification time. Effect

Active Publication Date: 2016-02-03
ANHUI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most LDH-based materials synthesized by co-precipitation and hydrothermal methods need to be immobilized by cross-linking agents when directly drip-coated on the modified electrodes, and the resulting modified electrodes usually have poor stability.

Method used

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  • Preparation method for electrode MnO2@Ni-Al LDH composite material of super capacitor
  • Preparation method for electrode MnO2@Ni-Al LDH composite material of super capacitor
  • Preparation method for electrode MnO2@Ni-Al LDH composite material of super capacitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Foam nickel pretreatment: Ultrasound with 3M HCl for 10 minutes, wash with deionized water and absolute ethanol for 15 minutes each;

[0036] (2) 60 DEG C of vacuum-drying with pretreated foamed nickel, the quality that weighs is 0.04694g;

[0037] (3) Weigh NiCl 2 ·6H 2 O is 0.7271g, AlCl 3 0.1433g, KNO 3 Dissolve 1.5341g in 100mL deionized water at room temperature, and use an electrochemical workstation CHI660C three-electrode system for electrodeposition (foam nickel as the working electrode, Hg / HgO as the reference electrode, and Pt electrode as the counter electrode), select -0.9V Carry out constant potential deposition, the deposition time is 1200s;

[0038] (4) After deposition, the nickel foam was rinsed with deionized water, dried under vacuum at 60° C., and weighed 0.04827 g.

Embodiment 2

[0040] (1) Foam nickel pretreatment: Ultrasound with 3M HCl for 10 minutes, wash with deionized water and absolute ethanol for 15 minutes each;

[0041] (2) 60 ℃ of vacuum-drying with pretreated foamed nickel, the quality that weighs is 0.05341g;

[0042] (3) Weigh NiCl 2·6H 2 O is 0.7216g, AlCl 3 0.1401g, KNO 3 1.5334g, KMnO 4 Dissolve 0.1601g in 100mL deionized water at room temperature, and use an electrochemical workstation CHI660C three-electrode system for electrodeposition (foam nickel as the working electrode, Hg / HgO as the reference electrode, and Pt electrode as the counter electrode), select -0.9V Carry out constant potential deposition, the deposition time is 1200s;

[0043] (4) After deposition, the nickel foam was rinsed with deionized water, dried under vacuum at 60° C., and weighed 0.05459 g.

Embodiment 3

[0045] (1) Foam nickel pretreatment: Ultrasound with 3M HCl for 10 minutes, wash with deionized water and absolute ethanol for 15 minutes each;

[0046] (2) 60 ℃ of vacuum-drying with pretreated foamed nickel, the quality that weighs is 0.06556g;

[0047] (3) Weigh NiCl 2 ·6H 2 O is 0.7369g, AlCl 3 0.1370g, NaNO 3 1.5435g, KMnO 4 Dissolve 0.3282g in 100mL deionized water at room temperature, and conduct electrodeposition with an electrochemical workstation CHI660C three-electrode system (foamed nickel as the working electrode, Hg / HgO as the reference electrode, and Pt electrode as the counter electrode), and select -1V for Constant potential deposition, the deposition time is 400s;

[0048] (4) After deposition, the nickel foam was rinsed with deionized water, dried under vacuum at 60° C., and weighed 0.06682 g.

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Abstract

The invention discloses a preparation method for an electrode MnO2@Ni-Al LDH composite material of a super capacitor. The method comprises the following steps that (1) nickel foam is pretreated; (2) the pretreated nickel foam is dried in a vacuum environment at the temperature of 50-60 DEG C till the weight of the nickel foam is constant; (3) potential-constant deposition is carried out by utilizing a three-electrode system of an electrochemical work station; and (4) the deposited nickel foam is washed by deionized water, and then dried in the vacuum environment at the temperature of 50-60 DEG C till the weight is constant. Compared with the prior art, the LDH base material can modify the electrode directly in the solution in the electrochemical synthesis method, the modification time is short, addition of a binder is not needed, and the deposition material can be firmly combined with a substrate. The prepared composite material is uniform in size, high in activity and efficiency, low in cost, short in production flow and convenient to produce, and the super capacitor prepared from the composite material is excellent in the electrochemical performance and very long in service life.

Description

technical field [0001] The invention relates to the fields of electrochemistry and energy, in particular to a supercapacitor material MnO 2 Preparation method of Ni-AlLDH composite material. Background technique [0002] With the advancement of science and technology and the improvement of social civilization, energy issues have become the core of the sustainable development strategy of human society, a key factor affecting the current energy decision-making and technology orientation of countries in the world, and at the same time, a huge driving force for the development of energy technology. . From the perspective of energy utilization form, electric energy, as the final form of energy utilization, has become an indispensable "source power" for human material production and social development. In recent years, the development of small discrete mobile power sources has increased the utilization forms and application range of electric energy. In addition, with the develo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/30H01G11/46H01G11/86
CPCY02E60/13
Inventor 王银玲董圣晔张雪梅王章翠李安娜李茂国
Owner ANHUI NORMAL UNIV
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