【作者】 王巍； 邵光杰； 马志鹏； 张春迎；

【Author】 WANG Wei,SHAO Guang-Jie~*,MA Zhi-Peng,ZHANG Chun-Ying (College of Environmental and Chemical Engineering,Yanshan University,Qinhuangdao,Hebei 066004,China)

【机构】 燕山大学 环境与化学工程学院；

【摘要】 采用脉冲电沉积法制备了Co掺杂的二氧化锰超级电容器电极材料。通过X射线衍射(XRD)、场发射扫描电镜(FE-SEM)等方法对电极材料的形貌和结构进行表征。结果表明,所得样品晶型为γ-MnO2,样品呈片层状网络结构,表面存在大量孔隙。循环伏安、电化学交流阻抗、恒电流充放电测试表明,Co的掺杂量对二氧化锰材料的电化学性能有很大影响。当电沉积电解液中Mn:Co的摩尔比为100:5时,电极材料的比电容具有最高值345.5 F/g,明显高于掺杂前的284.9 F/g。在6MKOH碱性电解液中充放电循环100次后,比电容稳定在333.6 F/g,表现出较好的容量保持能力。更多还原

【Abstract】 Co doped MnO₂ used as electrode material for supercapacitor was synthesized by pulse electrodeposition method. The morphology and structure of the products were characterized by X-ray diffraction（XRD） and field emission scanning electron microscope（FE-SEM）.Results showed that the crystallographic structure of the products was y-type MnO₂ And the MnO₂ was lamellar-network structure with many millipores on the surface.Cyclic voltammetry（CV）,electrochemical impedance spectrometry（EIS）,and galvanostatic charge-discharge tests indicated that the doping amount of Co had great effect on the electrochemical performance of manganese dioxide material.A specific capacitance of 345.4 F/g was obtained when the molar ratio of Mn to Co was 100:5 in electrodeposition electrolyte,which was obviously higher than 284.9 F/g of the undoped material.After 100 charge-discharge cycles in alkaline solution of in 6M KOH,the the specific capacitance stabilized at 333.6 F/g,exhibiting excellent capacitance retention ability.更多还原