中文摘要：

采用化学沉积和500℃热处理的方法在多孔氧化铝（AAo）模板中成功地合成了超级电容器电极材料y-Mn02纳米管．运用XRD，SEM，TEM和N2吸附脱附对实验制备的y-Mn02纳米管进行了结构、形貌和比表面积分析．通过循环伏安法（CV）和恒电流充放电测试在I mol／L Na2SO4溶液中研究了Y-MnO2电极的电化学性能．电化学实验结果表明：在电流密度100mA／g下，Y-MnO2电极的质量比容量可达到566F／g；充放电循环1000次后，电化学比容量仍然能够保持在90％以上．Y-MnO2纳米管具有优异的电化学性能，是一种很有前景的超级电容器电极材料．

英文摘要：

y-MnO2 nanotubes have been successfully synthesized by chemically depositing manganese hy droxide in anodic aluminum oxide （AAO） templates and thermally annealing at 500 ℃. The synthesized nanotubes have been characterized by X-ray diffraction （XRD）, scanning electron microscopy （SEM）, transmission electron microscopy （TEM） and nitrogen adsorption-desorption isotherm analysis. The electrochemical capacitance behavior of the y-MnO2 nanotubes electrode was investigated by cyclic voltam- metry and galvanostatic charge-discharge studies in 1 mol/L Na2SO4 solution. The electrochemical data demonstrate that the y-MnO2 nanotubes display good capacitive behavior with a high specific capacitance of 566 F/g at a current density of 100 mA/g and a good specific capacitance retention of ca. 90% after 1000 continuous charge-discharge cycles, indicating that the y-MnO2 nanotubes can be promising electroactive materials for supercapacitor.