In the present work RGO / Mn Oxcomposites were fabracated by a hydrothermal method at different conditions.The crystal structure,chemical state of the elements,and the microstrucuture of the as-obtained samples were chracterized using power X-ray diffraction( XRD),X-ray photoelectron spectroscopy( XPS) and field emission scanning electron microscopy( FESEM). Moreover,the electrochemical behaviors were evaluated by cyclic voltammogram( CV),galvanostatic charge-discharge and electrochemical impedance spectros...
【基金】
国家自然科学基金资助项目(51172162)
【更新日期】
2015-05-28
【分类号】
TB332;O646
【正文快照】
1引言超级电容器和其它化学电源相比,具有充放电速度快、功率密度高、使用温度范围广、绿色环保等优点[1-3]。根据储能机理的不同可以将其分为双电层电容器和赝电容电容器。和双电层电容器相比,赝电容电容器因其储能机理的特点具有较高的能量密度[4-8]。非贵金属锰系氧化物Mn O