| 초록 |
Supercapacitors are promising energy storage devices due to high power and fairly high energy densities owing to their excellent electrochemical properties. Nano-architectured materials impart unique surface characteristics providing higher specific capacitance through boosted electrochemical reactions. In addition, asymmetrically designed supercapacitors with distinct pseudocapacitive materials is known to effectively extend the potential window operability with enhanced energy density. In this regard, Fe, and Co-based binary metal oxide systems are widely studied for supercapacitors. However, to further improvise the capacitive performance, hierarchical nano-architectures of hetero-elements are developed for gaining excellent synergistic effect enhancing the over-all electrochemical performance. Since, performance in hierarchical nano-architectures are governed by surface-interface interactions and substrate, thus, the present work emphasizes on the designing of electrode materials on Ni-foam and surface-interface interaction is understood in terms of materials combination contributing in superior capacitance behavior. |
