WO_3/rGO纳米复合材料的制备及其储锂性能研究  

Synthesis of WO_3/rGO Nanocomposites and Its Lithium Storage Performance

作　　者：李芬芬[1] 郭金学[1] 

机构地区：[1]青岛科技大学化学与分子工程学院,山东青岛266042

出　　处：《青岛科技大学学报（自然科学版）》2016年第4期423-428,共6页Journal of Qingdao University of Science and Technology:Natural Science Edition

基　　金：山东省优秀中青年科学家科研奖励基金项目(BS2011CL020)

摘　　要：采用水热法合成了WO_3/rGO纳米复合材料,并将其用作锂离子电池负极材料。水热处理过程中将氧化石墨烯(GO)还原转变成了还原型氧化石墨烯(rGO),氧化石墨烯经还原后会产生不饱和的、共轭的碳原子,表面缺陷增加从而活性位点增加,使电导率显著增加。结果显示:所制备的WO_3/rGO纳米复合材料中,WO_3均匀地负载到了rGO纳米片上。电化学测试表明:所获得的WO_3/rGO纳米复合材料首次放电比容量达到1 135.7mA·h·g^(-1);200圈以后依然能够保持较高的放电比容量(780mA·h·g^(-1))。WO3/rGO nanocomposite has been synthesized via a simple hydrothermal approach as anode materials for lithium ion batteries（LIBs）.The GO has been reduced into rGO during the hydrothermal process.After the hydrothermal treatment,the rGO possesses more unsaturated,conjugated carbon atoms and surface defects,which will increase the number of catalytic active sites and the electrical conductivity.TEM images showed that WO3 nanoparticles were well dispersed onto the surface of rGO nanosheets.Electrochemical tests revealed that,the high initial capacity of 1 135.7mA·h·g^-1 was observed,which could be maintained as high as 780mA·h·g^-1 after 200 cycles.

关 键 词：锂离子电池 负极材料 WO3 还原氧化石墨烯 

分 类 号：TM912[电气工程—电力电子与电力传动] O611.62[理学—无机化学]