Nanomaterial used as supercapacitor electrode material, and preparation method thereof

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...

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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