Nanomaterial used as supercapacitor electrode material, and preparation method thereof

A technology of supercapacitors and nanomaterials, applied in hybrid capacitor electrodes, metal selenide/telluride, binary selenium/telluride compounds, etc., can solve the problems of high resistivity, low resistivity, and low carbon materials of sulfides. To achieve the effect of increasing the specific surface area, increasing the contact space, and increasing the specific capacitance

Inactive Publication Date: 2016-10-12
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, supercapacitor electrode materials mainly include carbon materials, conductive polymers, oxides, sulfides, etc., but these materials have their own shortcomings, such as low specific capacitance of carbon materials, poor cycle stability of conductive polymers, high resistivity of oxides, Sulfide also has the disadvantage of high resistivity, so fi

Method used

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  • Nanomaterial used as supercapacitor electrode material, and preparation method thereof
  • Nanomaterial used as supercapacitor electrode material, and preparation method thereof
  • Nanomaterial used as supercapacitor electrode material, and preparation method thereof

Examples

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Effect test

Embodiment 1

[0029] The raw material 1mmolCo(NO 3 ) 2 ·6H 2 O and 1 mmol Na 2 SeO 3Dissolve in 72ml of deionized water, stir evenly at room temperature and place in a reaction kettle, add 8ml of hydrazine hydrate, then immerse the substrate into the solution in the reaction kettle, and then place the reaction kettle in an oven for hydrothermal synthesis reaction , the reaction temperature was 140 °C, the reaction time was 24 hours, and the final product Co 0.85 Se nanomaterials.

Embodiment 2

[0031] The raw material 2mmolCo(NO 3 ) 2 ·6H 2 O and 2 mmol Na 2 SeO 3 Dissolve in 72ml of deionized water, stir evenly at room temperature and place in a reaction kettle, add 10ml of hydrazine hydrate, then immerse the substrate into the solution in the reaction kettle, and then place the reaction kettle in an oven for hydrothermal synthesis reaction , the reaction temperature was 160 °C, the reaction time was 24 hours, and the final product Co 0.85 Se nanomaterials.

Embodiment 3

[0033] The raw material 0.5mmolCo(NO 3 ) 2 ·6H 2 O and 0.5 mmol Na 2 SeO 3 Dissolve in 72ml of deionized water, stir evenly at room temperature and place in a reaction kettle, add 6ml of hydrazine hydrate, then immerse the substrate into the solution in the reaction kettle, and then place the reaction kettle in an oven for hydrothermal synthesis reaction , the reaction temperature was 120 °C, and the reaction time was 24 hours to obtain the final product Co 0.85 Se nanomaterials.

[0034] The chemical raw materials used in the above examples Co(NO3) 6H2O, Na 2 SeO 3 and hydrazine hydrate are analytically pure, and the resistance of deionized water is 18.0-18.5MΩ.

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Abstract

The invention discloses a Co0.85Se nanomaterial used as a supercapacitor electrode material, and a preparation method thereof. The nanometerial is a connected space hole-containing three-dimensional porous nanostructure formed through interlacing nanosheets. The Co0.85Se nanomaterial is synthesized through a one-step hydrothermal technology without using an organic template or a surfactant, so the method has the advantages of simple preparation, energy saving, and suitableness for industrial production. A Co0.85Se nanomaterial electrode containing the synthesized nanosheet structure is tested in a three-electrode system, a KOH solution is adopted as an electrolyte, the electrode nanomaterial has a high specific capacity of 1528F/g at a current density of 1A/g and still keeps 90% or above of the initial capacitance after 5000 frequency cycle charge and discharge at a high current of 10A/g, the internal resistance of the electrode nanomaterial is 1.4omega/cm<2>, and the charge transfer impedance is 0.73omega/cm<2>. The Co0.85Se electrode nanomaterial has the advantages of large specific surface area, high specific capacitance, good cycle performances, simple preparation cost and low cost.

Description

technical field [0001] The invention relates to supercapacitor electrode materials, in particular to the field of electrode materials for nanostructured selenide supercapacitors. Background technique [0002] Energy is the basis for the survival and development of human society. With the advancement of science and technology, the development of social economy and the continuous improvement of living standards, human beings have an increasing demand for energy. Since the beginning of the new century, with the continuous consumption of non-renewable energy such as oil, natural gas and coal, the contradiction between economic development and energy supply has obviously intensified, and environmental problems such as the greenhouse effect caused by the burning of fossil fuels have become increasingly prominent. In order to improve To improve the ecological environment and realize the sustainable development of society, the focus of the energy supply structure of human society w...

Claims

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Application Information

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IPC IPC(8): C01B19/04H01G11/24H01G11/30
CPCY02E60/13C01B19/007C01P2002/72C01P2004/03C01P2004/04C01P2006/40H01G11/24H01G11/30
Inventor 吕建国杨杰
Owner ZHEJIANG UNIV
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