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Preparation method of supercapacitor electrode material nickel and cobalt composite nanometer oxide

A technology of supercapacitors and nano-oxides, which is applied in the manufacture of hybrid capacitor electrodes and hybrid/electric double-layer capacitors, etc., to achieve the effects of easy-to-obtain raw materials, simple preparation methods, and low prices

Inactive Publication Date: 2016-04-20
HENAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So far, NiO and Co with different morphologies have been prepared. 3 o 4 、NiCoO 2 , NiO-Co 3 o 4 Composite electrode materials, but the actual specific capacitance obtained is much lower than the theoretical specific capacitance, so it is necessary to further study the synthesis of nickel and cobalt oxide electrode materials, so as to improve its specific capacitance

Method used

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  • Preparation method of supercapacitor electrode material nickel and cobalt composite nanometer oxide
  • Preparation method of supercapacitor electrode material nickel and cobalt composite nanometer oxide
  • Preparation method of supercapacitor electrode material nickel and cobalt composite nanometer oxide

Examples

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Effect test

Embodiment 1

[0026] (1) Weigh nickel acetate tetrahydrate (C 4 h 6 NiO 4 4H 2 O), cobalt acetate tetrahydrate (C 4 h 6 CoO 4 4H 2 (2) and urea, the corresponding quality is respectively 0.474g, 0.948g and 1.08g, is dissolved in 30mL deionized water, stirs 20 minutes, three are dissolved completely, then adds 0.5mL ethanolamine, continues to stir again 10 minutes to obtain mixed solution ;

[0027] (2) Pour the obtained mixed solution into a polytetrafluoroethylene hydrothermal reaction kettle to maintain a filling degree of 61%, then place the hydrothermal reaction kettle in a blast drying oven at 120°C for hydrothermal reaction for 24 hours, and then Cool the reactor to room temperature to obtain the reaction product;

[0028] (3) The obtained reaction product was centrifuged, washed with deionized water and ethanol respectively, and dried, and the dried sample was placed in a muffle furnace and calcined at 300°C (the heating rate was 5°C / min) for 3 hours to obtain The final prod...

Embodiment 2

[0034] (1) Weigh nickel acetate tetrahydrate (C 4 h 6 NiO 4 4H 2 O), cobalt acetate tetrahydrate (C 4 h 6 CoO 4 4H 2 (2) and urea, the corresponding quality is respectively 0.474g, 0.948g and 1.08g, is dissolved in 30mL deionized water, stirs 20 minutes, makes the three dissolve completely, then adds 1.0mL ethanolamine, continues to stir again 10 minutes to obtain mixed solution ;

[0035] (2) Pour the resulting mixed solution into a polytetrafluoroethylene hydrothermal reaction kettle to maintain a filling degree of 62%, then place the hydrothermal reaction kettle in a blast drying oven at 110°C for hydrothermal reaction for 48 hours, and then Cool the reactor to room temperature to obtain the reaction product;

[0036] (3) The obtained reaction product was centrifuged, washed with deionized water and ethanol respectively, and dried, and the dried sample was calcined in a muffle furnace at 350°C (heating rate: 5°C / min) for 3 hours to obtain The final product is super...

Embodiment 3

[0038] (1) Weigh nickel acetate tetrahydrate (C 4 h6 NiO 4 4H 2 O), cobalt acetate tetrahydrate (C 4 h 6 CoO 4 4H 2 (2) and urea, the corresponding quality is respectively 0.474g, 0.948g and 1.08g, is dissolved in 30mL deionized water, stirs 20 minutes, three are dissolved completely, then adds 0.5mL ethanolamine, continues to stir again 10 minutes to obtain mixed solution ;

[0039] (2) Pour the obtained mixed solution into a polytetrafluoroethylene hydrothermal reaction kettle to maintain a filling degree of 61%, then place the hydrothermal reaction kettle in a blast drying oven at 120°C for hydrothermal reaction for 24 hours, and then Cool the reactor to room temperature to obtain the reaction product;

[0040] (3) The obtained reaction product was centrifuged, washed with deionized water and ethanol respectively, and dried, and the dried sample was calcined in a muffle furnace at 400°C (the heating rate was 5°C / min) for 3 hours to obtain The final product is superc...

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Abstract

The invention discloses a preparation method of a supercapacitor electrode material nickel and cobalt composite nanometer oxide. The preparation method comprises the following concrete steps of (1) dissolving nickel acetate, cobaltous acetate tetrahydrate and urea into deionized water, stirring for 20 minutes, adding ethanol amine, and then stirring for 10 minutes to obtain a mixed solution; (2) pouring the obtained mixed solution into a hydrothermal reaction kettle, carrying out a hydrothermal reaction in the hydrothermal reaction kettle at the temperature of 110 to 130 DEG C for 6 to 48 hours, and then cooling to the room temperature to obtain a reaction product; (3) sequentially centrifuging, washing and drying the obtained reaction product, then heating to 200 to 500 DEG C at the heating rate of 5 DEG C / min, calcining for 3 hours, and finally preparing the supercapacitor electrode material nickel and cobalt composite nanometer oxide comprising three different structures of nanosheets, nano particles and nano wires. The preparation method provided by the invention is simple, green and environmental friendly, low in cost, and beneficial to large-scale application of the nickel and cobalt composite nanometer oxide electrode material in the industry of supercapacitors.

Description

technical field [0001] The invention belongs to the technical field of synthesis of supercapacitor electrode materials, and in particular relates to a preparation method of nickel and cobalt composite nano-oxides as supercapacitor electrode materials. Background technique [0002] With the depletion of resources and energy, the rapid expansion of population and the rapid development of social economy, the ecological environment is deteriorating day by day. In order to meet people's growing material needs, people are constantly looking for better performance, longer life, lower price, A new type of energy conversion and storage system with a wider range of applications, so supercapacitors came into being. Supercapacitors are also called electrochemical capacitors. They are energy storage devices with higher power density than traditional capacitors. They are widely used in digital cameras due to their excellent characteristics such as high energy density, short charging time ...

Claims

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Application Information

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IPC IPC(8): H01G11/86H01G11/30
CPCY02E60/13H01G11/86H01G11/30
Inventor 王显威王小二刘一璞孔月月朱倩倩杜淑菊孙璐王丽芳
Owner HENAN NORMAL UNIV
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