Sm^3+掺杂TiO2锂离子电池负极材料的制备及其性能  

Synthesis and properties of Sm^3+doped TiO2 anodematerial for lithium ion battery

作　　者：殷立雄[1] 白培杰[1] 霍京浩 韩浪 李书航 YIN Li-xiong;BAI Pei-jie;HUO Jing-hao;HAN Lang;LI Shu-hang(School of Materials Science and Engineering,Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials,Shaanxi University of Science&Technology,Xi′an 710021,China)

机构地区：[1]陕西科技大学材料科学与工程学院陕西省无机材料绿色制备与功能化重点实验室,陕西西安710021

出　　处：《陕西科技大学学报》2020年第6期112-117,共6页Journal of Shaanxi University of Science & Technology

基　　金：国家自然科学基金项目(51772178);陕西省科技厅科技创新计划项目(GXYD1.8)。

摘　　要：以六水合硝酸钐(Sm(NO 3)3·6H 2O)和钛酸四正丁酯(C16H36O4Ti)为原料,无水乙醇和乙酰丙酮为溶剂,采用溶剂热法制备出Sm3+掺杂TiO 2(TiO 2:Sm3+)纳米晶.与TiO2相比,Sm3+掺杂可以减小材料在充放电过程中的体积膨胀,提高结构稳定性.结果表明,TiO 2∶Sm3+作为锂离子电池负极材料在1 A/g电流密度下首次放电比容量可达529.3 mAh/g,100次循环后容量为92.8 mAh/g,从第二圈循环后库伦效率保持在85%以上,表现出良好的循环稳定性.TiO2∶Sm3+nanocrystals were synthesized by solvothermal method with Sm(NO3)3·6H 2O and tetrabutyl titanate as raw materials,anhydrous ethanol and acetylacetone as solvent.Compared with TiO 2,Sm3+doping can reduce the volume expansion and improve the structural stability of the materials during charging and discharging.The results show that TiO 2∶Sm3+nanocrystals,as the anode material of lithium ion batteries,exhibit a high initial specific discharge capacity of 529.3 mAh/g at 1 A/g.After 100 cycles,the capacity stabilizes at 92.8 mAh/g and the coulombic efficiency retain above 85%after the second cycle,displaying a superior cycling stability.

关 键 词：TiO2∶Sm^3+ 溶剂热法 负极 锂离子电池 

分 类 号：TB43[一般工业技术] TM912[电气工程—电力电子与电力传动]