期刊
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
卷 31, 期 24, 页码 23025-23036出版社
SPRINGER
DOI: 10.1007/s10854-020-04830-5
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The specific surface area is an important parameter influencing the storage capability of materials due to its direct effect on the reaction sites availability. In this study, ZnFe2O4 nanoparticles with a high specific surface area, 78.9 m(2) g(-1), were prepared by a weak ultrasonic irradiation technique. Fe(NO3)(3)center dot 9H(2)O, Zn(NO3)(2)center dot 6H(2)O and glucose were used as reagents and the prepared precursor was calcined in the air at 400 degrees C for 3 h. The product was characterized by thermogravimetric analysis, Fourier transform infrared, Raman spectra, X-ray diffraction, Brunauer-Emmett-Teller, Scanning electron microscopy as well as Transmission electron microscopy. The charge storage ability, cycling stability, and ion transport of the produced ZnFe2O4 nanoparticles were examined by cyclic voltammetry, galvanostatic charge-discharge and electrochemical impedance spectroscopy tests in 1, 3 and 6 M KOH solutions. The highest specific capacitance of the ZnFe2O4 nanoparticles was obtained 712 F g(-1) at the scan rate of 2 mV s(-1) in 6 M KOH electrolyte, and the capacity retention for ZnFe2O4 nanoparticles was still maintained after 2000 cycles at 92.4, 94.2 and 96.6% in 1, 3 and 6 M KOH electrolytes, respectively.
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