A kind of nio@comoo 4 Preparation method of /nf capacitance electrode

Abstract

A kind of NiO@CoMoO 4 The preparation method of / NF capacitance electrode is based on NF, C O Cl 2 .6H 2 O, Na 2 m O o 4 .2H 2 O, glucose, and tough materials are used as raw materials, respectively, after NiO@CoMoO 4 Preparation of / NF, NiO@CoMoO 4 / NF carbon quantum dot loading, NiO@CoMoO loaded with carbon quantum dots 4 / NF toughness material wrapping and other steps are prepared. The present invention NiO@CoMoO 4 / NF has a higher specific capacitance value, and can also greatly improve the conductivity of the electrode. On the other hand, NiO@CoMoO 4 / NF electrodes are treated with tough materials, which can make NiO@CoMoO 4 The / NF electrode adapts to the volume change during the charging and discharging process, and at the same time can prevent the corrosion of the electrolyte, which ultimately makes the product cycle stable. After 10,000 charging and discharging cycles, the capacity of the present invention does not decay, and still maintains 100% of the maximum capacity. The mass specific capacitance has been greatly increased, and the mass specific capacitance of the electrode can be as high as 1457F / g at 1 A / g. The electrochemical energy storage is excellent, and it is worthy of market promotion.

Description

technical field [0001] The invention belongs to the technical field of energy storage, in particular to a NiO@CoMoO 4 The preparation method of / NF capacitance electrode, wherein NF is nickel foam. Background technique [0002] In the 21st century, the population is increasing rapidly, the social economy is developing rapidly, and the primary issue of economic development is energy, so the world's energy demand is increasing sharply. In recent years, the use efficiency of traditional energy sources such as oil, coal, and natural gas has been low, and human beings have encountered environmental pollution and energy problems more and more frequently. At the same time, energy application forms are also changing with the advent of the high-tech information age. , No pollution, small discrete mobile high-performance power supply demand is growing rapidly, among which supercapacitors are getting more and more attention and attention as a high-efficiency energy conversion device. ...

AI Technical Summary

Problems solved by technology

A variety of transition metal oxides have been deeply studied as electrode materials for supercapacitors. In order to further improve performance, transition metal oxide materials with nanostructures have become a research hotspot in the field of supercapacitors. Nanostructures can not only serve as a catalyst for electrochemical reactions It provides more active sites and shortens the ion transmission path, but the nanostructured transition metal oxide material is not ideal as a supercapacitor electrode material. The specific capacitance value is far from the theoretical value and the experimental value. On the other hand , the charging and discharging process of the nanostructured transition metal oxide electrode will destroy its own structure due to the change of the electrode volume, which will eventually lead to the decline of the energy storage performance of the supercapacitor after multiple charging and discharging, and the cycle stability is not ideal. In addition, due to the transition of the nanostructure The metal oxide electrode is in the electrolyte for a long time, and the electrolyte is corrosive to a certain extent, which will also cause the structure of the electrode to be damaged, which will eventually lead to a decrease in charge and discharge performance and a greatly shortened service life

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