SnO2/rGO锂离子电池负极复合材料制备及性能  

Synthesis and performance of SnO2/rGO composite as anode for lithium ion battery

作　　者：何声太[1] 韩璐[1] 邹思怡 李珂 王丽丽 HE Sheng-tai;HAN Lu;ZOU Si-yi;LI Ke;WANG Li-li(School of Material Science and Engineering,Tiangong University,Tianjin 300387,China)

机构地区：[1]天津工业大学材料科学与工程学院,天津300387

出　　处：《天津工业大学学报》2020年第3期29-33,共5页Journal of Tiangong University

基　　金：国家重大科学研究计划资助项目(2012CB933301);大学生创新创业训练计划项目(2017021932)。

摘　　要：为提高锡氧化物锂离子电池负极材料的电池性能,使用水热法制备了具有不同还原氧化石墨烯(rGO)含量的SnO2/rGO复合材料,并研究了rGO含量对复合材料性能的影响。X射线衍射(XRD)和场发射扫描电镜(FESEM)分析结果表明:所合成的SnO2/rGO复合材料的特征衍射峰的位置与金红石型晶体结构的SnO2完全匹配,SnO2/rGO复合材料中的SnO2颗粒附着在rGO表面。电化学测试表明:rGO质量分数为50%的SnO2/rGO复合材料的循环性能最佳,在160 mA/g的电流密度下,经过100次循环后,放电比容量维持在633.6 mA·h/g,与单质SnO2循环50次的224.1 mA·h/g的比容量相比,材料循环稳定性有了很大的提高。In order to improve the properties of SnO2-based anode,SnO2/rGO composite materials with different SnO2/rGO mass ratio are prepared by hydrothermal method,and the influence of rGO amount on the properties of lithium ion battery is investigated in detail.XRD and FESEM analyses demonstrate that the peaks of as-synthesized rGO/SnO2 can be indexed as the rutile SnO2.SnO2 particle locates on the surface of rGO.Electrochemical tests show that SnO2/rGO composite with 50%graphene oxide has the best cycle performance.At current density of 100 mA/g,the discharge specific capacity still maintains at 633.6 mA·h/g after 100 cycles,which is much better than that of pure SnO2 of 224.1 mA·h/g after 50 cycles.

关 键 词：二氧化锡 还原氧化石墨烯 复合 负极 锂离子电池 

分 类 号：TM911[电气工程—电力电子与电力传动]