Performance of High Energy Density Symmetric Supercapacitor Based on Sputtered MnO2 Nanorods
Performance of High Energy Density Symmetric Supercapacitor Based on Sputtered MnO2 Nanorods
复制标题
DOI：
10.1002/slct.201600757
复制
发表时间：
2016-08-16
期刊：
影响因子：
2.1
通讯作者：
Chandra, Ramesh
中科院分区：
文献类型：
--
作者：
Kumar, Ashwani;Sanger, Amit;Chandra, Ramesh
在这里，我们证明了粘合剂和非常有效的超级电容器电极的制造的基础上的MnO 2纳米棒的银（Ag）涂层的多孔阳极氧化铝（AAO）基板上，在一个非常简单的方式，通过直流磁控溅射。Ag涂覆的多孔AAO基板充当优良的集流体，并且还将MnO 2的高比电容提高至接近796 F/g。制备了一种对称的α-MnO 2纳米棒/Ag/AAO电极超级电容器，并对其进行了表征和性能研究。无粘合剂的超级电容器装置提供高电容（132 F/g）、良好的循环能力（3000次循环后95.52%的电容保持率），高能量密度（26.4瓦时/千克），以及高功率密度（类似于在6 Wh/kg下的36 kW/kg）。这些观察到本发明的基于MnO 2纳米棒的装置的优异的电化学性能，表明其作为超级电容器电极在能量存储应用中的巨大潜力。
Here, we demonstrate the fabrication of binder free and very efficient supercapacitor electrodes based on MnO2 nanorods on silver (Ag) coated porous anodic aluminum oxide (AAO) substrate in a very simple way by DC magnetron sputtering. The Ag coated porous AAO substrate acts as excellent current collector and also enhances high specific capacitance of MnO2 up to similar to 796 F/g. A symmetric supercapacitor device in form of alpha-MnO2 nanorods/Ag/AAO electrode has been fabricated, characterized and its performance has been investigated in detail. The binder free supercapacitor device delivered a high capacitance (132 F/g), good cycling ability (95.52% capacitance retention after 3000 cycles), high energy density (26.4 Wh/kg), and also a high power density (similar to 36 kW/kg at 6 Wh/kg) in a voltage range of 1.3 V. These observed excellent electrochemical performances of the present MnO2 nanorods based device, suggest it tremendous potential as supercapacitor electrodes in energy storage applications.