自支撑石墨烯/二氧化锰/泡沫镍复合材料的电化学性能  

Electrochemical performance of grapheme / manganese dioxide / NF self-supported composite

作　　者：马骏[1] 晋日亚[1] 郑璐[1] 孙友谊[1] 

机构地区：[1]中北大学化工与环境学院,山西太原030051

出　　处：《现代化工》2016年第3期114-116,118,共4页Modern Chemical Industry

摘　　要：以三维泡沫镍(NF)为模板,在不添加模板剂的条件下,通过电沉积法沉积石墨烯(G),再采用水热合成制备纳米片二氧化锰(Mn O_2),得到自支撑电极复合材料G/Mn O_2/NF,改善其作为电极材料的电化学性能。用X射线衍射(XRD)、拉曼光谱(Raman)和扫描电子显微镜(SEM)对复合材料的微观结构和表面形貌进行分析,通过循环伏安(CV)、恒电流充放电(GCD)、交流阻抗(EIS)测试了电极复合材料的电化学性能。结果表明:在电流密度为1 A/g的条件下,复合电极材料的比电容达到722 F/g,经过1 000次循环后比电容保持率为97%。Using three-dimensional porous nickel foam（ NF） as template,the grapheme / manganese dioxide / NF（ G/Mn O_2/ NF） self-supported composite is prepared through electrochemical deposition of graphene（ G） and hydrothermal synthesis of nanosheets manganese dioxide（ Mn O_2）,which is then employed as binder-free electrode to improve the electrochemical properties. The micro structure and surface morphology of the composite are analyzed by XRD,Raman and SEM. The electrochemical properties of the electrode material are investigated by CV,GCD and EIS tests. The results indicate that its specific capacitance is up to 722 F / g at the current density of 1 A / g. Moreover,it still remains at about 97% of initial value after 1000 times cycles of GCD test.

关 键 词：无粘结剂 自支撑 G/Mn O2/NF 超级电容器 电化学性能 

分 类 号：TM912[电气工程—电力电子与电力传动]