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

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...

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

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