SnO_2/还原氧化石墨烯/聚吡咯三元复合物的合成及其电化学电容性能  

Synthesis and electrochemical property of SnO_2/RGO/PPy ternary composites for electrochemical capacitors

作　　者：张海英[1] 胡中爱[1] 张亚军[1] 张富海[1] 梁鹏举[1] 杨玉英[1] 张子瑜[1] 吴红英[1] 

机构地区：[1]西北师范大学化学化工学院,甘肃省高分子材料重点实验室,生态环境相关高分子材料教育部重点实验室,兰州730070

出　　处：《化工新型材料》2012年第4期138-141,共4页New Chemical Materials

基　　金：国家自然科学基金(20963009和21163017);甘肃省自然科学基金资助项目(0803RJA005)

摘　　要：采用两步法制备出均匀分散的SnO2/还原氧化石墨烯(SnO2/RGO)二元复合物,再以二元复合物为模板,通过化学氧化法聚合吡咯(Py)单体,制备出SnO2/还原氧化石墨烯/聚吡咯(SnO2/RGO/PPy)三元复合材料。利用红外光谱(FTIR)、X射线衍射(XRD)和场发射扫描电镜(FESEM)对复合材料结构和形貌进行物性表征,利用循环伏安、恒电流充放电和交流阻抗对复合材料进行电化学性能研究,并讨论了不同含量的PPy对复合材料的结构和性能的影响。结果表明,所合成的三元复合材料的比电容随PPy含量的增加而增大,最大达到305.3F/g。三元复合物电容性能增强源于SnO2、RGO与PPy三者的相互协同作用,以及材料层状结构和大的比表面积。A two-step method was used to prepare SnO2/RGO in a homogeneous dispersion,and then the resultant SnO2/RGO served as a template to obtain SnO2/RGO/PPy ternary composites by in-situ chemical oxidative polymerization of pyrrole.Their morphologies and microstructures were characterized by Fourier transform infrared spectrometer（FTIR） analysis,X-ray diffraction（XRD） analysis,Field emission scanning electron microscopy（FESEM）.The electrochemical properties of the ternary composites were investigated by cyclic voltammogram（CV）,galvanostatic charge/discharge tests and electrochemical impedance techniques.The results showed that the ternary composites gave a good charge-discharge cycle performance and a maximum specific capacitance of 305.3F/g,which was greater than that of SnO2/RGO binary composite.Furthermore,the specific capacitance of samples wasincreased with the increasing of amount of PPy in the ternary composites.The layered structure of composites with high surface area and the positive synergy effect between components might enhanced the capacitive performance.

关 键 词：SnO2/还原氧化石墨烯/聚吡咯 三元复合材料 电化学电容 

分 类 号：TQ320.1[化学工程—合成树脂塑料工业]