A facile strategy for ZnFe_2O_4 coating preparing by electrophoretic deposition and its supercapacitor performances

摘要

Abstract The development of low-cost and efficient coating technology for ZnFe~(2)O~(4)in the application of supercapacitor, electronic devices, chemical sensors, is desirable but remains a challenge. In this study, a facile fabrication of ZnFe~(2)O~(4)coatings via electrophoretic deposition (EPD) methods has been realized by employing hydrothermal synthesized ZnFe~(2)O~(4)nanoparticles as starting materials. Benefiting from systematic investigation for the deposition kinetic of ZnFe~(2)O~(4)nanoparticles in the dispersion system of ethanol-acetylacetone with the addition of nitric acid, smooth ZnFe~(2)O~(4)coating with good film characteristics was successfully and rapidly fabricated. With a preliminary study of ZnFe~(2)O~(4)coatings as supercapacitor electrode, the specific capacitance decayed from 198 to 17.1 F g_(−1)when the deposition time increased from 0.5 to 10 min because of the poor electric conductivity. Therefore, an electrophoretic codeposition of ZnFe~(2)O~(4)and conductive carbon material is necessary in the given application with desire of good electron transfer ability.