镍-铋复合氧化物的制备及其在三电极体系中的赝电容行为  

Synthesis of nickel-bismuth oxide composite and its electrochemical capacitive behaviors

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

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

出　　处：《化工新型材料》2012年第6期75-78,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：采用溶剂热法合成镍-铋氢氧化物复合前驱体,后经热处理将其转化为镍-铋复合氧化物。采用X射线衍射(XRD)、场发射扫描电镜(FESEM)对复合氧化物的结构和形貌进行了表征。运用循环伏安法和恒电流充放电等电化学方法对其电化学电容性能进行了研究。测试结果表明,复合氧化物中组分间的配比是材料取得良好电容性能的关键因素。通过对比研究,优化出复合氧化物的最佳配比,并充分讨论了该复合氧化物作为单电极时的能量及功率密度。A nickebbismuth oxide composite was firstly synthesized by thermally treating the nickel-bismuth hy- droxide,which was obtained through simultaneous solvotherrnal hydrolyzation of nickel and bismuth salt in N, N-dimethyl formamide（DMF）at 180℃. The structure and morphology of the composites were characterized using powder X？ ray dif- fraction（XRD）and field emission scanning electron microscopy（FESEM）. The electrochemical behaviors were measured by cyclic voltammogram（CV）and galvanostatic charge？ discharge. The results showed that the molar ratio in nickel-bismuth oxide composite was a key factor to achieve excellent capacitance performance. The optimal ratio of the composite was given by means of the parallel experiments. Furthermore, the power density and energy density were discussed in detail when the resulting composite was used as single electrode for supercapacitors.

关 键 词：氧化镍 氧化铋 超级电容器 比电容 

分 类 号：TM53[电气工程—电器]