Highly flexible supercapacitors with manganese oxide nanosheet/carbon cloth electrode
Highly flexible supercapacitors with manganese oxide nanosheet/carbon cloth electrode
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DOI：
10.1016/j.electacta.2011.05.090
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发表时间：
2011-08-01
影响因子：
6.6
通讯作者：
Chen, Kuei-Hsien
中科院分区：
文献类型：
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作者：
Chen, Ying-Chu;Hsu, Yu-Kuei;Chen, Kuei-Hsien
我们报道了一种简单和成本有效的合成由水钠锰矿型二氧化锰（MnO 2）纳米片的柔性碳布（CC）通过阳极电沉积技术的分级多孔结构。观察到花瓣状MnO 2，具有几nm的片厚度和100 nm的典型宽度，在CC上具有强粘附力。这种多级多孔MnO 2-CC杂化结构不仅表现出优异的电容性能，例如高达425 Fg（-1）的比电容，而且由于其有效释放弯曲应力而具有高抗裂性，如通过循环伏安法和恒电流充/放电测量在不同弯曲构型曲率下观察到的。此外，基于这种MnO 2纳米片/CC电极的柔性超级电容器在弯曲测试下超过3000次循环的电容性能显示出显著改善的稳定性，这对于未来在柔性储能装置中的应用是非常有希望的。(C)2011爱思唯尔有限公司保留所有权利。
We report a simple and cost-effective synthesis of hierarchically porous structure composed of Birnessite-type manganese dioxide (MnO2) nanosheets on flexible carbon cloth (CC) via anodic electrodeposition technique. Petal-shaped MnO2, having sheet thickness of a few nm and typical width of 100 nm, with a strong adhesion on CC is observed. This hierarchically porous MnO2-CC hybrid structure dose exhibit not only excellent capacitance properties, such as up to 425 Fg(-1) in specific capacitance, but also high crack resistance owing to its efficient release of bending stress, as observed by cyclic voltammetry and galvanostatic charge/discharge measurements under different curvature of bending configurations. Furthermore, flexible supercapacitors based on this kind of MnO2 nanosheet/CC electrode showed significantly improved stability in capacitive performance over 3000 cycles under the bending test, which is highly promising for future applications in flexible energy storage device. (C) 2011 Elsevier Ltd. All rights reserved.