A Comparative Study of Nanoparticles and Nanospheres ZnFe2O4 as Anode Material for Lithium Ion Batteries

作者：Xu Huayun; Chen Xianglan; Chen Liang; Li Li'; e; Xu Liqiang; Yang Jian; Qian Yitai

来源：International Journal of Electrochemical Science, 2012, 7(9): 7976-7983.

DOI：10.1016/s1452-3981(23)17969-7

• ZnFe2O4
• Nanostructured materials
• Lithium ion battery
• Electrochemical impedance spectroscopy

Spinel structure ZnFe2O4 were prepared by hydrothermal and solvothermal methods. Investigations on X-ray diffraction (XRD) and transmission electron microscopy (TEM) indicate that the samples are well-crystallized cubic ZnFe2O4 with average nanoparticle size ranging from 30 to 90 nm and nanosphere size in the range of 200 similar to 250 nm composed of around 20 nm nanoparticles with increasing sintered temperature for hydrothermal and solvothermal method, respectively. The ZnFe2O4 samples sintered at 600 degrees C show high lithium-storage capacity and good reversibility. Compared with nanoparticles, ZnFe2O4 nanospheres demonstrate a reversible capacity over 860 mAh g(-1) and good rate capability. Electrochemical impedance spectroscopy (EIS) was carried out and decreased warburg impedance was found for nanospheres compared to nanoparticle ZnFe2O4.

• 出版日期2012-9
• 单位山东大学