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

被引：0

作者：

Xu, Huayun ^{[1
]}

Chen, Xianglan ^{[1
]}

Chen, Liang ^{[1
]}

Li, Li'e ^{[1
]}

Xu, Liqiang ^{[1
]}

Yang, Jian ^{[1
]}

Qian, Yitai ^{[1
]}

机构：

[1] 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 | 2012年 / 7卷 / 09期

基金：

中国国家自然科学基金;

关键词：

ZnFe2O4; Nanostructured materials; Lithium ion battery; Electrochemical impedance spectroscopy; CYCLING PROPERTIES; LI-STORAGE; GRAPHITE; FILMS;

D O I：

暂无

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

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.

引用

页码：7976 / 7983

页数：8

共 23 条

[1] Changes in oxidation state and magnetic order of iron atoms during the electrochemical reaction of lithium with NiFe2O4 [J].