Facile hydrothermal and sol-gel synthesis of novel Sn-Co/C composite as superior anodes for Li-ion batteries  

作　　者：Xiaoli Zou Xianhua Hou Zhibo Cheng Yanling Huang Min Yue Shejun Hu 

机构地区：[1]Laboratory of Quantum Engineering and Quantum Materials,School of Physics and Telecommunication Engineering,South China Normal University [2]Engineering Research Center of Materials and Technology for Electrochemical Energy Storage (Ministry of Education) [3]BTR New Energy Materials Co.LTD

出　　处：《Chinese Science Bulletin》2014年第23期2875-2881,共7页

基　　金：financially supported by the National Natural Science Foundation of China (51201066,51171065);Natural Science Foundation of Guangdong Province (S2012020010937,10351063101000001);Foundation for Distinguished Young Talents in Higher Education of Guangdong (2012LYM_0048);the Scientific Research Foundation of Graduate School of South China Normal University (2013kyjj038)

摘　　要：As an anode material in lithium ion battery,the Sn-Co/C composite electrode materials have been successfully synthesized by hydrothermal and sol-gel methods,respectively.The resultant composites were mainly composed of Sn-based oxides,nanometer Sn-Co alloy and carbon.Carbon and Co,acting as buffer materials,can accommodate to the large volume change of active Sn during the discharge-charge process,thus improving the cycling stability.Although charge/discharge curves revealed the excellent cycle performance for samples synthesized by both methods,composites obtained by the sol-gel showed a better dispersion effect of nanoparticles on the carbon matrix and possessed much more improved stable capacity with*624.9 mAh g-1over 100 cycles and that by hydrothermal method only exhibited*299.3 mAh g-1.Therefore,the Sn-Co/C composites obtained by sol-gel synthesis method could be a perfect candidate for anode material of Li-ion storage battery.As an anode material in lithium ion battery, the Sn-Co/C composite electrode materials have been successfully synthesized by hydrothermal and solgel methods, respectively. The resultant composites were mainly composed of Snbased oxides, nanometer Sn-Co alloy and carbon. Carbon and Co, acting as buffer materials, can accommodate to the large volume change of active Sn during the discharge-charge process, thus improving the cycling stability. Although charge/discharge curves revealed the excellent cycle performance for samples synthesized by both methods, composites obtained by the sol-gel showed a better dispersion effect of nanoparticles on the carbon matrix and possessed much more improved stable capacity with 624.9 mAh g-1 over 100 cycles and that by hydrothermal method only exhibited ～299.3 mAh g-1. Therefore, the Sn-Co/C composites obtained by solgel synthesis method could be a perfect candidate for anode material of Liion storage battery.

关 键 词：复合材料 锂离子电池 合成样品 阳极材料 凝胶法 水热法 溶胶 循环稳定性 

分 类 号：TM912[电气工程—电力电子与电力传动] TB33[一般工业技术—材料科学与工程]