Document Type

Article

Publication Date

11-1-2017

Abstract

A series of ZnFe2O4 nanocrystals were synthesized by sol-gel method. The surface morphology, structure and the electrochemical performace of the materials annealed in the temperature range of 500-800°C were characterized by X-ray diffraction(XRD), scanning electron microscopy(SEM), Multipoint N2 adsorption-desorption experiment, constant current charging-discharging test, cyclic voltammetry(CV) and electrochemical impedance spectroscopy(EIS) techniques. Consequently, the morphology and electrochemical performance of these materials are very sensitive to the sintering temperature. ZnFe2O4 material treated at 600°C exhibits the initial reversible capacity of 1384.4 mAh g-1 and retains the highest capacity of 622 mAh g-1 after 50 cycles. The superior electrochemical performance is attributed to its smaller charge transfer resistance of 43.9 ω and higher lithium ion diffusion coefficient of 2.01×10-15 cm2 s-1, which due to the morphology with the smaller particle size and higher dispersibility.

Publication Source (Journal or Book title)

International Journal of Electrochemical Science

First Page

10211

Last Page

10220

Download

Share

COinS