摘要
Design and fabrication of advanced functional materials is essential but still a challenge for current energy storage devices. Herein, polypyrrole coated highly porous vanadium oxide (V 2 O 5 at Ppy) nanorod and nanoplate arrays with large mass loadings, have been successfully constructed on carbon felt (CF) via a facile solvothermal reaction followed by in-situ polymerization technique. Interestingly, the structure of the V 2 O 5 thin films can be simply tuned from porous nanoplates to nanorods with controlled calcination time. In addition, MnO 2 nanowires with Ppy coating were also grown on the CF substrates to form MnO 2 at Ppy/CF electrode through the similar method. As integrate electrodes for energy storage devices, V 2 O 5 at Ppy/CF nanorods demonstrate more superior electrochemical properties compared to V 2 O 5 at Ppy/CF nanoplates. By virtue of their intriguing structural features and uniformly Ppy coating, a solid-state flexible hybrid device (SFHD) based on V 2 O 5 at Ppy/CF and MnO 2 at Ppy/CF as the negative and positive electrode, respectively, manifests outstanding cycling stability (approximately 89% retention even after 20,000 cycles), excellent mechanical flexibility, and remarkable energy density (28.6Whkg -1 at power density of around 200Wkg -1 ), which makes it hold great potential to be unexceptionably flexible devices for portable and wearable electronics.