东篱科研大数据发现系统（DRDS）

位置：成果数据库 > 期刊 > 期刊详情页

Synthesis of urchin-like Sn-ZnO-C composite and its enhanced electrochemical performance for lithium-ion batteries

时间：0
分类：TB332[一般工业技术—材料科学与工程] TM912[电气工程—电力电子与电力传动]
作者机构：[1]Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
相关基金：This work was supported by the National Nat- ural Science Foundation of China （91022033 and 21201158）, the National Basic Research Program of China （201 ICB935901）, Anhui Provincial Natural Science Foundation （1208085QE101）, and the Fundamental Research Funds for the Central Universities （WK 2340000027）,

作者： Long Fan Jingjing Zhang Yongchun Zhu Yitai Qian[1]

关键词：碳复合材料, 锂离子电池, 氧化锌, 电化学性能, 透射电子显微镜, 扫描电子显微镜, 放电容量, 阳极材料, Urchin-like structure, Sn-ZnO-Ccomposite , Anode , Lithium-ion batteries

中文摘要：

Urchin-like Sn–ZnO–C composite have been successfully prepared by thermal annealing of ZnSn(OH)6precursor in acetylene/argon gas(1/9;v/v).The phase of the urchin-like Sn–ZnO–C has been characterized by X-ray diffraction(XRD)and Raman spectrum.The images of scanning electron microscopy(SEM)and transmission electron microscope(TEM)demonstrate that the Sn–ZnO–C composite with an average of 3 lm in diameter is composed of many core–shell nanowires and carbon nanotubes emanated from the center.The thermal annealing temperature and time have crucial effects on the formation of urchin-like structure and carbon content of the Sn–ZnO–C composites.As an anode for lithium-ion batteries,the urchin-like Sn–ZnO–C composite delivers a discharge capacity of 1,034.5 mAh/g in initial cycle and 571.9 mAh/g reversible discharge capacity after 25 cycles at a current density of 50 mA/g.The superior energy storage properties highlight the urchin-like Sn–ZnO–C composite as a potential alternative anode material in lithium-ion batteries.

英文摘要：

Urchin-like Sn-ZnO-C composite have been successfully prepared by thermal annealing of ZnSn（OH）6 precursor in acetylene/argon gas （1/9; v/v）. The phase of the urchin-like Sn-ZnO-C has been characterized by X-ray dif- fraction （XRD） and Raman spectrum. The images of scanning electron microscopy （SEM） and transmission electron micro- scope （TEM） demonstrate that the Sn-ZnO-C composite with an average of 3 μm in diameter is composed of many core- shell nanowires and carbon nanotubes emanated from the center. The thermal annealing temperature and time have crucial effects on the formation of urchin-like structure and carbon content of the Sn-ZnO-C composites. As an anode for lithium-ion batteries, the urchin-like Sn-ZnO-C composite delivers a discharge capacity of 1,034.5 mAh/g in initial cycle and 571.9 mAh/g reversible discharge capacity after 25 cycles at a current density of 50 mA/g. The superior energy storage properties highlight the urchin-like Sn-ZnO-C composite as a potential alternative anode material in lithium-ion batteries.