二氧化锰纳米片的制备及其电化学性质  

Preparation and electrochemical performance of MnO_2 nanosheets

作　　者：王耀先[1] 贺国旭[1] 腊明[1] 张秋霞[1] 

机构地区：[1]平顶山学院化学化工学院,河南平顶山467000

出　　处：《电子元件与材料》2015年第12期24-26,共3页Electronic Components And Materials

基　　金：河南省科技攻关项目(No.KJT142102310462)

摘　　要：只利用MnSO_4和(NH_4)_2S_2O_8两种原料,采用水热法制得β-MnO_2纳米材料。分別采用场发射扫描电镜(FESEM)、X射线衍射(XRD)、同步热分析(TG/DSC)等测试技术对材料的形貌、结构及热稳定性做了表征。采用恒电流充放电、循环伏安、交流阻抗等方法对材料的电化学性质进行测试。结果表明:MnO_2纳米片材料具有优良的充放电性能,在电流密度为10×10^(-3)A/cm^2时,其比电容达到85.3F/g,很适合用于电化学电容器的电极材料。Only use MnSO4 and （NH4）2S2Os, B-MnO2 nanosheets were synthesized with hydrothermal synthesis method. The morphology, microstructure, and thermal stability of the samples were characterized using field emission scanning electron microscopy （FESEM）, powder X-ray diffraction （XRD）, and synchronous thermal analysis （TG/DSC）, respectively, β-MnO2 nanosheets were prepared as an electrode, constant current charge-discharge, alternate current （AC）impendence and cyclic voltammetry were carried out to investigate its electrochemical performance. The results show that the prepared samples have excellent electrochemical performance. At a current density of 10×10^-3A/cm^2, a specific capacitance of 85.3 F/g was achieved. Excellent performance makes it well suited for using as an electrode material for electrochemical capacitors.

关 键 词：纳米片 二氧化锰 水热法 电极材料 电化学性质 比电容 

分 类 号：TN304[电子电信—物理电子学]