溶胶-凝胶前驱体喷雾干燥法制备钠离子电池Na_2Ti_3O_7@MWCNTs负极材料  

Synthesis of Na_2Ti_3O_7@MWCNTs anode material by spray-drying method of sol-gel precursor for sodium-ion batteries

作　　者：邹崴[1] 王影[1] 黄宗令[1] 李晶泽[1] 

机构地区：[1]电子薄膜与集成器件国家重点实验室,电子科技大学微电子与固体电子学院,成都610054

出　　处：《中国科学：化学》2014年第8期1347-1353,共7页SCIENTIA SINICA Chimica

基　　金：国家自然科学基金(21073029;11234013;51211140045);教育部新世纪人才计划资助项目(NCET-10-0296);中央高校基本科研业务费项目(ZYGX2012Z003)资助

摘　　要：本文采用溶胶-凝胶前驱体喷雾干燥法制备了Na2Ti3O7@MWCNTs(多壁碳纳米管)复合材料,用于钠离子电池的负极.这种方法得到的Na2Ti3O7球形壳层包裹纳米Na2Ti3O7@MWCNTs复合材料的结构与用固相烧结法、简单溶胶-凝胶法制备的Na2Ti3O7-MWCNTs复合材料在电化学性能上相比,具有倍率性能好、小电流下50次循环后比容量衰减小等优势.We reported Na2Ti3O7@multiwalled carbon nanotubes （MWCNTs） composite as advanced anode material for sodium-ion batteries. Na2Ti3Oy@MWCNTs nanocomposite was synthesized by spray-drying of sol-gel precursor, displaying a particular core-shell structure, where the core consisted of Na2Ti3O7 coated MWCNTs and the shell was made of well crystallized Na2Ti3O7 microspheres. NazTi3OT@MWCNTs exhibited much better rate capability and cycling performance with respect to pristine Na2Ti3O7 directly prepared by solid state reaction and Na2Ti3O7- MWCNTs composite synthesized by sol-gel reaction. The combination of spray-drying and sol-gel method is one of the promising tools to improve the electrochemical performance of the electrode materials for advanced sodium- ion batteries.

关 键 词：钠离子电池 Na2Ti3O7 碳纳米管 溶胶-凝胶 喷雾干燥 

分 类 号：TM912[电气工程—电力电子与电力传动]