Method for preparing cobalt selenide super-capacitor material by non-template electrodeposition method

A technology of supercapacitors and electrodeposition methods, applied in chemical instruments and methods, hybrid/electric double layer capacitor manufacturing, hybrid capacitor electrodes, etc., can solve the problems of poor cycle stability of conductive polymers, rare research and development of selenides, sulfides Problems such as high resistivity, to achieve the effect of facilitating diffusion and migration, favorable specific surface area, and uniform distribution

Active 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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  • Method for preparing cobalt selenide super-capacitor material by non-template electrodeposition method
  • Method for preparing cobalt selenide super-capacitor material by non-template electrodeposition method
  • Method for preparing cobalt selenide super-capacitor material by non-template electrodeposition method

Examples

Experimental program
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Effect test

Example Embodiment

[0030] Example 1

[0031] Use dilute hydrochloric acid, deionized water and ethanol to wash the foamed nickel mesh successively and then dry it: configure 0.02mol / L Na 2 SeO 3 solution and 0.02mol / L Co(CH 3 COO) 2 solution, then add 0.1mol / L CH 3 Mix the COOLi solution evenly to obtain the precursor solution; immerse the cleaned nickel mesh in the precursor solution, and scan at 25°C under the condition of electrochemical deposition from -1.2V to 0.2V at a rate of 10mV / s, and scan for 15 Second, it can be observed that the surface of the nickel mesh is gradually covered by a layer of black substance. After the reaction is completed, the product is rinsed with deionized water and ethanol respectively and dried at 60°C for 6 hours to obtain the product.

Example Embodiment

[0032]Example 2

[0033] Use dilute hydrochloric acid, deionized water and ethanol to wash the foamed nickel mesh and dry it: configure 0.01mol / L Na 2 SeO 3 solution and 0.01mol / L Co(CH 3 COO) 2 solution, then add 0.05mol / L CH 3 Mix the COOLi solution evenly to obtain the precursor solution; immerse the cleaned nickel mesh in the precursor solution, and scan at 50°C at a rate of 20mV / s from -1.2V to 0.2V under the electrochemical deposition conditions, and scan for 10 Second, it can be observed that the surface of the nickel mesh is gradually covered by a layer of black substance. After the reaction is completed, the product is rinsed with deionized water and ethanol respectively and dried at 60°C for 6 hours to obtain the product.

Example Embodiment

[0034] Example 3

[0035] Use dilute hydrochloric acid, deionized water and ethanol to wash the foamed nickel mesh successively and dry it: configure 0.005mol / L Na 2 SeO 3 solution and 0.005mol / L Co(CH 3 COO) 2 solution, then add 0.2mol / L CH 3 Mix the COOLi solution evenly to obtain the precursor solution; immerse the cleaned nickel mesh in the precursor solution, and scan at 75°C from -1.2V to 0.2V at a rate of 5mV / s under the electrochemical deposition conditions, and scan for 20 Second, it can be observed that the surface of the nickel mesh is gradually covered by a layer of black substance. After the reaction is completed, the product is rinsed with deionized water and ethanol respectively and dried at 60°C for 6 hours to obtain the product.

[0036] The chemical raw material used in the above examples Co(CH 3 COO) 2 、Na 2 SeO 3 、CH 3 All COOLi are analytically pure, and the resistance of deionized water is 18.0-18.5MΩ.

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Abstract

The invention discloses a method for preparing a Co0.85Se super-capacitor material by a non-template electrodeposition method. The material is of a nano flower structure; the non-template electrodeposition method is adopted for synthesis of the Co0.85Se nanomaterial; and the method mainly comprises the steps of: (1) preparing an Na2SeO3 solution and a Co(CH3COO)2 solution and then adding a CH3COOLi solution for mixing to obtain a precursor solution; (2) immersing a nickel net into the precursor solution and depositing the Co0.85Se nanomaterial on the surface of the nickel net by an electrochemical deposition method; and (3) washing the product by deionized water and ethanol separately and then drying the product to obtain the Co0.85Se super-capacitor material. The operation and equipment are simple; large-area preparation can be carried out without a template; the formed Co0.85Se nano flower is evenly distributed; a Co0.85Se nanomaterial electrode is tested under a three-electrode system, and has high specific capacity of 1065F/g under the current density of 1A/g; and the charge transfer impedance is 0.43ohm/cm<2>. The prepared Co0.85Se nano electrode material has excellent electrochemical rate capability and cycling stability; and the preparation method and the application field of the electrochemical capacitor material are expanded.

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): H01G11/30H01G11/86C01B19/00C25D9/04B82Y30/00B82Y40/00
CPCY02E60/13H01G11/30B82Y30/00B82Y40/00C01B19/007C25D9/04H01G11/86
Inventor 吕建国杨杰
Owner ZHEJIANG UNIV
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