石墨烯/ZnO/聚苯胺复合材料的制备及其储锂性能的研究  

Preparation of graphene/ZnO/polyaniline composites and research on lithium storage performance

作　　者：张利锋[1] 张金振[1] 宋巧兰 何蕾[2] 

机构地区：[1]陕西科技大学材料科学与工程学院,陕西西安710021 [2]广东海洋大学食品科技学院,广东湛江524088

出　　处：《陕西科技大学学报（自然科学版）》2013年第6期67-72,共6页Journal of Shaanxi University of Science & Technology

基　　金：国家自然科学基金项目(21203116);陕西省科技厅自然科学基金项目(2013JQ2018);陕西省教育厅科研计划项目(2013JK0934);陕西科技大学"三秦学者"科研启动基金项目(BJ11-26);陕西科技大学博士科研启动基金项目(BJ12-09);2012国家级大学生创新创业训练计划项目(201210708016)

摘　　要：以六水合硝酸锌、石墨及苯胺为原料,采用传统水热-原位聚合两步法首次制备了石墨烯/ZnO/聚苯胺复合材料.通过XRD、SEM、FT-IR、TG等分析方法对产物进行表征,并测试了该复合材料的储锂能力和循环稳定性.实验结果表明:ZnO以纳米棒状结构均匀分布在石墨烯表面,聚苯胺包裹在石墨烯/ZnO的表面形成石墨烯/ZnO/聚苯胺复合材料.电化学性能测试结果表明:石墨烯的存在可有效提高ZnO的导电性,同时聚苯胺柔性分子链可有效缓冲ZnO在充放电过程中的体积效应,对电极材料的循环稳定性起到了至关重要的作用.Graphene/ZnO/polyaniline composite materials were synthesized for the first time by two-step method of traditional hydrothermal and in situ polymerization with Zn（NO3）2 · 6H2O,graphite and aniline as raw materials. The physical and chemical properties of gra- phene/ZnO/polyaniline composite materials were studied by XRD, SEM, FT-IR and TG. The electrochemical properties of as-prepared products were evaluated by galvanostatic charge- discharge tests. The experimental results showed that the ZnO nanorod attached on the sur- face of graphene matrix. Polyaniline covered graphene/ZnO to form graphene/ZnO/polyani- line composite materials. Electrochemical property research showed that the present of gra- phene can effectively improve the conductivity of ZnO. Simultaneously, the flexible chains of polyaniline can reduce the volume effect of ZnO during charge-discharge process, which play a crucial role for its cycling stability.

关 键 词：石墨烯 ZNO 聚苯胺 复合材料 

分 类 号：TM912.9[电气工程—电力电子与电力传动]