【摘要】 采用阳极电化学沉积法在镍片上制备二氧化锰(MnO₂纳米棒阵列。用XRD、SEM、透射电子显微镜（TEM）和选区电子衍射（SAED）对MnO₂阵列进行分析,用恒流充放电与循环伏安测试研究电化学电容性能。制备的MnO₂纳米棒直径约为500 nm,长度约为5μm,由相互连接的超薄纳米片构成,具有较好的电容性能。MnO₂阵列电极在电流为1 A/g、电压为0. 05～1. 00 V时的比电容达152. 0 F/g,循环1 000次的比电容仍保持在146. 9 F/g。纳米棒阵列电极具有纳米多孔的结构,有利于电解质离子的快速迁移,从而获得较好的电容性能。更多还原

【Abstract】 Manganese dioxide（ MnO₂） nanorod array was deposited on nickel foils via anodic electrodeposition. The as-prepared MnO₂ nanorod array was characterized by means of XRD,SEM,transmission electron microscopy（ TEM） and selected-area electron diffraction（ SAED）. Electrochemical capacitive performance was investigated by galvanostatic charge/discharge and cyclic voltammetry methods. The obtained MnO₂ nanorod was composed of interconnected ultrathin nanosheets. The nanorod was about500 nm in diameter and about 5 μm in length,exhibited excellent capacitive performance. High specific capacitance of 152. 0 F/g was achieved at 1 A/g in 0. 05-1. 00 V,the specific capacitance could retain 146. 9 F/g after 1 000 cycles. The superior capacitive performance could be attributed to its unique nanoporous structure,which facilitated fast ions transportation.更多还原