| The main cause of the problem of low energy density of anode materials is its low specific capacitance.In this paper,the copper iron metal oxide and hydroxide composite structural was designed and prepared,building a high energy density with different microstructure of super capacitor electrode materials.Through the order nanostructure design,on the one hand,increase the specific surface area of electrode material,improve electrochemical active component load.on the other hand,shorten the contact path of electrolyte with electrodes,improve the transmission efficiency of electrolyte ions and electrons,thereby gain ideal super capacitor performance.The main research contents are as follows:(1)Using one-step oxidation method and hydrothermal method,copper powder was used as the matrix to prepare Fe3O4@Cuo nanotubes.By means of SEM,HRTEM,XPS and other structural characterization methods,the structure and morphology of the hollow tubular structure were characterized,and the supercapacitance performance of electrode materials was tested by electrochemical workstation.Because of the existence of the tubular structure,the chemical site is fully exposed.The test results show that the electrode material has a good supercapacitor performance,with a ratio of 920 F/g to the current density of 1 A/g.But its cyclic stability is not satisfactory.(2)According to the previous system,it was found that although the copper ferric oxide and its hydroxide composite materials have a larger ratio of capacitors,their circulation stability is poor.Therefore,the non-matrix Fe3O4@CuO electrode material was prepared by a similar method,as a supercapacitance negative electrode material,and tried to introduce aspartic acid organic system to solve its stability problem.The test results show that the introduction of aspartic acid has a larger than capacitance 1020 F/g(1 A/g),and after 5000 cycles,the retained capacitance value is still 65%. |
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