Co3O4@PPy壳核复合纳米结构的制备与电化学性能
首发时间:2016-05-25
摘要:论文结合水热反应和恒电位沉积法制备了Co3O4@PPy核壳复合纳米结构,研究了这种导电聚合物/金属氧化物杂化复合材料的电化学特性。结果表明,Co3O4@PPy核壳复合纳米结构的PPy纳米薄片有大表面积的皱褶状,可增加核壳结构的比表面积,促进离子的有效吸附,进而提高电化学性能。Co3O4@PPy核壳结构的纳米线复合电极,在1 mA/cm2的电流密度下,面积比电容和质量比电容分别为4.9 F/cm2和2017 F/g。在5 mA/cm2电流密度下循环1000次后,Co3O4@PPy核壳结构的复合材料的面积比电容为2.5 F/cm2。交流阻抗分析也表明,Co3O4@PPy核壳结构的复合电极的电导率高于单一Co3O4纳米线电极。
关键词: 超级电容器 电极材料 水热法 电沉积 Co3O4@PPy 复合电极
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The synthesis and electrochemical performances of hybrid Co3O4@PPy core/shell nanostructure
Abstract:We fabricated the well-aligned Co3O4@PPy core/shell nanowires by direct electrodeposition of ultrathin PPy nanoflakes on Co3O4 nanowires array with nickel foam as current collector. The electrochemical characteristics of conductive polymer/metal oxide composite materials were investigated. The as-prepared unique 3D Co3O4@PPy hybrid nanostructure can provide a large number of mesopores, facilitating the ion access and transport of electrolyte. The specific capacitance as high as 2017 F/g (4.90 F/cm2) at current density of 1 mA/cm2 was obtained based on this Co3O4@PPy core/shell hybrid electrode. After 1000 cycles, 60% capacitance can be maintained with a areal capacitance of 2.45 F/cm2. And capacity of the Co3O4@PPy hybrid electrode is still higher than the initial value of pristine Co3O4 electrode.
Keywords: Supercapacitor Electrode materials Hydrothermal Electrodeposition Co3O4@PPy hybrid electrode
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No.4692105115022714****
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Co3O4@PPy壳核复合纳米结构的制备与电化学性能
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