超级电容器电极材料纳米α-MnO_2的制备及性能  

Preparation and properties of nano-structured α-MnO_2 as electrode material of supercapacitor

作　　者：张琦[1] 郑明森[1] 朱亚薇[1] 董全峰[1] 金明钢[2] 詹亚丁[1] 林祖赓[1] 

机构地区：[1]厦门大学化学化工学院,福建厦门361005 [2]厦门大学宝龙电池研究所,福建厦门361005

出　　处：《电池》2005年第6期437-439,共3页Battery Bimonthly

基　　金：973项目(2002CB211800);国家自然科学基金(20373058);福建省科技项目(2003H044)

摘　　要：用KMnO4和MnSO4水溶液作为原料,用液相沉淀法制备无定形α-MnO2·nH2O.对样品进行比表面积测定(BET)、XRD、SEM等测试.通过循环伏安法和恒流充放电测试研究了样品的电化学行为.合成的无定形α-MnO2·nH2O在0.5mol/L的Na2SO4电解液中,在0～0.9 V(vs.SCE)范围内,电流为10 mA,2 mV/s的扫描速度下的比电容可达126.4 F/g.无定形α-MnO2·nH2O是较好的超级电容器电极材料.Amorphous α-MnO2·nH2O was synthesized with chemical coprecipitation method by using KMnO4 and MnSO4 aqueous solution as raw materials. The sample was characterized by BET, XRD and SEM. The electrochemical characteristics of the sample were characterized by CV and constant current charge-discharge tests. The specific capacitance of the amorphous α-MnO2·nH2O was 126.4 F/g in 0.5 mol/L Na2SO4 electrolyte at the scan rate of 2 mV/s,the current of 10 mA, in the range of 0～0.9 V （vs. SCE）. The amorphous α-MnO2·nH2O was an excellent electrode material for suoercaoaeitor.

关 键 词：超级电容器 电极材料 二氧化锰 比容量 

分 类 号：TM53[电气工程—电器]