| Popis: |
We report a simple and cost-effective synthesis of hierarchically porous structure composed of Birnessite-type manganese dioxide (MnO 2 ) nanosheets on flexible carbon cloth (CC) via anodic electrodeposition technique. Petal-shaped MnO 2 , having sheet thickness of a few nm and typical width of 100 nm, with a strong adhesion on CC is observed. This hierarchically porous MnO 2 –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 MnO 2 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. |
Full Text from ScienceDirect