新型纳米结构二氧化锰的制备及其超级电容性能  

Preparation and supercapacitive performance of a novel nanostructural MnO_2

作　　者：段立谦[1] 李景印[1] 李玉佩[1] 何前国[1] 

机构地区：[1]河北科技大学理学院,河北石家庄050018

出　　处：《河北科技大学学报》2011年第2期169-172,共4页Journal of Hebei University of Science and Technology

基　　金：河北科技大学科研基金资助项目(XL200872;XL200908)

摘　　要：以MnSO4和(NH4)2S2O8为主要原料,Fe(NO3)3为添加剂,采用水热法制备了菜花状MnO2。运用XRD,SEM对制备的MnO2进行了形貌和结构分析。通过循环伏安、恒流充放电测试和交流阻抗研究了MnO2的电化学性能。结果表明,实验制备的MnO2为α型菜花状结构,其在6 mol/L的KOH电解液中及0～0.4 V的电位范围内表现出良好的超级电容性能,电流密度为100 mA/g时,其比容量达到176 F/g。Cauliflower MnO2 was prepared by hydrothermal synthesis method by reacting MnSO4 and（NH4）2S2O8 with Fe（NO3）3.The samples were analyzed by X-ray diffraction（XRD） and scanning electron microscopy（SEM）.Cyclic voltammetry and galvanostatic charge-discharge were used to characterize the electrochemical performance of the samples.The results show that the prepared samples are α-MnO2.The particles are in a cauliflower shape.In an electrolyte of 6 mol/L KOH,electrode based on the MnO2 show perfect supercapacitor characterization in the potential region of 0～0.4 V.At a current density of 100 mA/g,a specific capacitance of 176 F/g is achieved.

关 键 词：水热法 MNO2 超级电容器 比容量 

分 类 号：TQ137[化学工程—无机化工] TM533[电气工程—电器]