A method for preparing nickel-copper sulfur and oxygen compound composite film electrodes

Abstract

The invention relates to a method for preparing a nickel-copper sulfur and oxygen compound composite film electrode. The low-temperature sulfur oxidation cycle treatment is adopted, and the film electrode is prepared in two steps of firstly preparing a current collector plated with a nickel-copper-phosphorus alloy coating on the surface, including the steps of iron foil degreasing, washing, pickling, washing, nickel-copper-phosphorus chemical plating, washing, and drying; and secondly, preparing a composite film electrode, including immersion of the current collector in the supersaturated sulfide solution, and low-temperature sulfur oxidation cycle treatment. When the prepared composite film electrode is used in a supercapacitor electrode, the composite film electrode has the advantages of small internal resistance, good heat and corrosion resistance property, high specific capacitance, and high bonding force between the electrode material film and the current collector. The specific capacitance of the prepared composite film electrode reaches 1.49F / cm2. The low-temperature sulfur oxidation cycle treatment method has the characteristics of being less in investment, simple in operation process, good in repeatability and suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of preparation of two-dimensional thin-film electrode materials, and in particular relates to a method for preparing nickel-copper sulfur-oxygen compound composite thin-film electrodes through low-temperature sulfur oxidation cycle treatment. Background technique [0002] Due to the characteristics of high power density, good cycle stability and fast charging and discharging, supercapacitors have broad application prospects in smart grids, new energy vehicles, solar and wind power generation, consumer electronics and other fields. Electrodes are the core components of supercapacitors, so the development of new electrode materials is the main research direction of supercapacitor technology. Although supercapacitors made of noble metal oxide electrodes have been successfully applied in military and other fields, their high price limits their popularization and application in civilian fields. Although studies ...

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Problems solved by technology

[0003] The currently reported preparation of transition metal oxide and sulfide electrodes is mainly based on the hydrothermal reaction method. This electrode preparation method has the disadvantages of complex process, many procedures, and poor repeatability of the prepared electrodes. In addition, the current literature reports The content of active material in the test electrodes is very low. When the content of active material in the test electrode is increased, the specific capacitance of the electrode will drop sharply, which leads to the fact that although the mass specific capacitance of the electrode reported in the literature is close to the theoretical mass ratio of the oxide electrode Capacitance, but its area specific capacitance is not very high. For actual capacitors, the electrode area is certain, and the small area specific capacitance means that it is difficult to manufacture supercapacitors with large capacitance.

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