摘要
以锯屑为模板,结合溶胶-凝胶法成功地合成了β-MnO_2纳米棒。采用X射线衍射(XRD)、透射电子显微镜(TEM)对产物的晶型和形貌进行表征。结果表明,借助锯屑的天然孔道结构可以较好地控制MnO_2的形状和晶粒尺寸。进一步通过循环伏安、交流阻抗和恒流充放电测试对合成的β-MnO_2纳米棒电极材料的电化学性能进行表征。结果表明,在1 mol/L Na_2SO_4水溶液中,0.0～1.0V(vs.SCE)电位范围内,β-MnO_2纳米棒具有良好的电化学电容性能,单电极比容可达200 F/g,经过50次循环后电极比容量保持率为98%。
In this paper, β-MnO2 nanorods were successfully synthesized by using sol-gel process with sawdust as natural, templates for the first time. The structure and morphology of the obtained samples were characterized by X-ray diffraction （XRD）, transmission electron microscopy （TEM）. The results indicated that the shape and size of MnO2 could be controlled by the natural porous structure of the sawdust. Electrochemical properties of β-MnO2 electrode were examined by cyclic voltammetry, electrochemical impedance spectroscopy and galvanostatic charge-discharge tests. The results demonstrated that β-MnO2 nanorods had excellent electrochemical performance in 1.0 mol/L Na2SO4 electrolyte within the potential range of 0.0-1.0 V （vs.SCE）. The initial specific capacitance of single MnO2 electrode reached 200 F/g and 98% was maintained after 50 cycles.
出处
《电池工业》
CAS
2009年第6期404-408,共5页
Chinese Battery Industry
