VOOH-CBC复合材料的制备及其电容性能  

Preparation and Capacitance Performance of VOOH-CBC Composite

作　　者：梅京 马拥军[2] 

机构地区：[1]四川省非金属复合与功能材料重点实验室-省部共建国家重点实验室培育基地,四川绵阳621010 [2]西南科技大学分析测试中心,四川绵阳621010

出　　处：《西南科技大学学报》2016年第4期22-27,共6页Journal of Southwest University of Science and Technology

基　　金：四川省非金属复合与功能材料重点实验室开放基金(11ZXFX26)

摘　　要：以偏钒酸铵(NH_4VO_3)和碳化细菌纤维素(CBC)为原料,水合肼(N_2H_4·H_2O)为还原剂,利用水热法合成了VOOH-CBC复合材料。通过X射线衍射(XRD)和扫描电子显微镜(SEM)进行了结构及形貌分析。结果表明,VOOH结晶度良好,呈现直径150 nm左右的空心球状,并且均匀分布在CBC网络结构之中。通过循环伏安和恒流充放电等技术对其电化学性能进行了研究。结果表明:在2 M KCl溶液中,-1^-0.2 V电势窗口内,VOOH-CBC复合材料具有良好的电容性能及循环稳定性,在5 m Vs-1扫描速度下比电容为91.71 Fg^(-1),在1 Ag(-1)电流密度下经1000次循环后电容量能保持78%。The VOOH- CBC composite is prepared during a hydrothermal process,with the NH4VO3 and carbonized bacterial cellulose（ CBC） as raw materials and the N2H2·H2O as reducing agent. The structure and morphology of the composite is characterized by X- Ray Diffraction（ XRD） and scanning electron microscope（ SEM）. Results show that the VOOH crystallinity was good,taking on a hollow sphere morphology with a diameter about 150 nm and uniformly distributed amid the network structure of CBC.The electrochemical properties of the composite is investigated by techniques like cyclic voltammeter and galvanostatic charging and discharging. Results indicate that the composite has good capacitive behavior and cycling stability in 2 M KCl electrolyte with a potential window range from- 1-- 0. 2 V. The capacitance of the composite is 91. 71 Fg-1at a scan rate of 5 m Vs- 1and its capacitance has a retention of78% after 1 000 cycles at a current density of 1 Ag-1.

关 键 词：超级电容器 VOOH CBC 电化学性能 

分 类 号：O627.53[理学—有机化学]