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Cobalt selenide nanometer material serving as electrode material of supercapacitor and preparation method of cobalt selenide nanometer material

A technology of supercapacitors and nanomaterials, which is applied in the manufacture of hybrid capacitor electrodes and hybrid/electric double-layer capacitors, etc., can solve the problems of poor cycle stability of conductive polymers, sparse research and development of selenides, and high oxide resistivity. Dense distribution, high specific capacity, and the effect of increasing specific surface area

Inactive Publication Date: 2016-11-09
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 finding a supercapacitor electrode material with high specific capacitance, low resistivity and good cycle stability has become the goal of research and industrialization.
[0004] Selenide is a potential supercapacitor material. At present, the research and development of selenide for supercapacitor electrode materials is still very rare, and there are few reports

Method used

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  • Cobalt selenide nanometer material serving as electrode material of supercapacitor and preparation method of cobalt selenide nanometer material
  • Cobalt selenide nanometer material serving as electrode material of supercapacitor and preparation method of cobalt selenide nanometer material
  • Cobalt selenide nanometer material serving as electrode material of supercapacitor and preparation method of cobalt selenide nanometer material

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Embodiment 1

[0036] 1) Precursor formation: use an analytical balance to weigh Co(NO 3 ) 2 •6H 2 O 、CO(NH 2 ) 2 , NH 4 F was dissolved in deionized water, stirred on a magnetic stirrer at room temperature to form a solution with uniform concentration; then transferred to a polytetrafluoroethylene-lined reaction kettle, and the prepared nickel foam substrate was immersed in the reaction kettle In the solution, and then placed in an oven at 120 ° C for 7 h, naturally cooled to room temperature. After the end, the substrate was taken out and washed and dried to obtain the precursor Co(OH)(CO 3 ) 0.5 The substrate of the nanowires.

[0037] 2) Selenization treatment: Weigh Se, NaBH 4 Dissolved in deionized water, configured as an aqueous solution of 1mol / L NaHSe and transferred to a hydrothermal reactor, with the precursor Co(OH)(CO 3 ) 0.5 The nanowire substrate continues to be used as the substrate, immersed in the NaHSe aqueous solution in the reactor, then placed in an oven and r...

Embodiment 2

[0039] 1) Precursor formation: use an analytical balance to weigh Co(NO 3 ) 2 •6H 2 O 、CO(NH 2 ) 2 , NH 4 F was dissolved in deionized water, stirred on a magnetic stirrer at room temperature to form a solution with uniform concentration; then transferred to a polytetrafluoroethylene-lined reaction kettle, and the prepared nickel foam substrate was immersed in the reaction kettle In the solution, and then placed in an oven at 110 ° C for 8 h, naturally cooled to room temperature. After the end, the substrate was taken out and washed and dried to obtain the precursor Co(OH)(CO 3 ) 0.5 The substrate of the nanowires.

[0040] 2) Selenization treatment: Weigh Se, NaBH 4 Dissolved in deionized water, configured into a 0.5mol / L NaHSe aqueous solution and transferred to a hydrothermal reactor, and obtained in step 1 with Co(OH)(CO 3 ) 0.5 The nanowire substrate continues to be used as the substrate, immersed in the NaHSe aqueous solution in the reactor, then placed in an o...

Embodiment 3

[0042] 1) Precursor formation: use an analytical balance to weigh Co(NO 3 ) 2 •6H 2 O 、CO(NH 2 ) 2 , NH 4 F was dissolved in deionized water, stirred on a magnetic stirrer at room temperature to form a solution with uniform concentration; then transferred to a polytetrafluoroethylene-lined reaction kettle, and the prepared nickel foam substrate was immersed in the reaction kettle In the solution, and then placed in an oven at 100 ° C for 10 h, naturally cooled to room temperature. After the end, the substrate was taken out and washed and dried to obtain the precursor Co(OH)(CO 3 ) 0.5 The substrate of the nanowires.

[0043] 2) Selenization treatment: Weigh Se, NaBH 4 Dissolved in deionized water, configured into a 2mol / L NaHSe aqueous solution and transferred to a hydrothermal reactor, and obtained in step 1 with Co(OH)(CO 3 ) 0.5 The nanowire substrate continues to be used as the substrate, immersed in the NaHSe aqueous solution in the reaction kettle, then placed ...

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Abstract

The invention discloses a Co<0.85>Se nanometer material serving as an electrode material of a supercapacitor and a preparation method of the Co<0.85>Se nanometer material. The nanometer material adopts a fibrous nanometer structure. The Co<0.85>Se nanometer material adopts a two-step hydrothermal synthesis method, and the two-step hydrothermal synthesis method comprises the steps of firstly, preparing a precursor Co(OH)(CO<3>)<0.5> nanowire by a hydrothermal reaction method; and secondly, carrying out selenization processing on the precursor by the hydrothermal reaction method to obtain the Co<0.85>Se nanometer material. When placed in a three-electrode system for test, the nanometer electrode material is endowed with high specific capacity of 1,249F / g under current density of 2A / g, the specific volume over 80% still can be maintained after 3,000 cycles of charging and discharging under 100mA current, and the charge transfer impedance is 0.32 ohm / cm<2>. The Co<0.85>Se nanometer electrode material prepared according to the method has the advantages of high specific capacitance, good cycle performance, simplicity in preparation method 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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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01G11/86H01G11/30
CPCY02E60/13H01G11/24H01G11/30H01G11/86
Inventor 吕建国杨杰
Owner ZHEJIANG UNIV
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