Highly flexible supercapacitors with manganese oxide nanosheet/carbon cloth electrode |
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| Authors: | Ying-Chu Chen Yu-Kuei Hsu Yan-Gu Lin Yu-Kai Lin Ying-Ying Horng Li-Chyong Chen Kuei-Hsien Chen |
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| Affiliation: | aCenter for Condensed Matter Sciences, National Taiwan University, Taipei 106, Taiwan;bDepartment of Opto-Electronic Engineering, National Dong Hwa University, Hualien 97401, Taiwan;cInstitute of Atomic and Molecular Science, Academia Sinica, Taipei 106, Taiwan;dDepartment of Physics, National Taiwan University, Taipei 106, Taiwan |
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| Abstract: | 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 F g−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. |
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| Keywords: | Supercapacitors MnO2 Nanosheet Flexible Birnessite |
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