Preparation method of NiO@CoMoO4/NF capacitor electrode

Abstract

The invention discloses a preparation method of a NiO@CoMoO4 / NF capacitor electrode. The NiO@CoMoO4 / NF capacitor electrode is prepared by taking NF, COCl2.6H2O, Na2MOO4.2H2O, glucose and a tough material as raw materials through the steps of preparation of NiO@CoMoO4 / NF, loading of NiO@CoMoO4 / NF carbon quantum dots, coating of the NiO@CoMoO4 / NF tough material loaded with the carbon quantum dots and the like. The NiO@CoMoO4 / NF has a higher specific capacitance value, meanwhile, the conductivity of the electrode can be greatly improved, on the other hand, the NiO@CoMoO4 / NF electrode is treated by a ductile material, so that the NiO@CoMoO4 / NF electrode can adapt to volume change in the charging and discharging process, meanwhile, the corrosion effect of an electrolyte can be prevented, finally, the product is good in cycling stability, and after 10000 times of charging and discharging cycles, the capacity is not attenuated, 100% of the maximum capacity is still kept, the mass specific capacitance is greatly increased, the mass specific capacitance of the electrode at 1 A / g can reach 1457 F / g, the electrochemical energy storage is excellent, and the electrode is worthy of market popularization.

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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