标题：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
作者机构：[Xu, Huayun; Chen, Xianglan; Chen, Liang; Li, Li'e; Xu, Liqiang; Yang, Jian; Qian, Yitai] Shandong Univ, Key Lab Colloid & Interface Chem, Minist Educ 更多
通讯作者地址：[Xu, HY]Shandong Univ, Key Lab Colloid & Interface Chem, Minist Educ, Sch Chem & Chem Engn, Jinan 250100, Peoples R China.
来源：INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
关键词：ZnFe2O4; Nanostructured materials; Lithium ion battery; Electrochemical; impedance spectroscopy
摘要：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.