Abstract
Flake-like NiCo bimetal-organic framework (NiCo-MOF) is prepared via a simple one-step hydrothermal process. By combining the advantages of composition designing and distinctive micro/nanostructures, the flake-like NiCo-MOF constructed with two-dimensional (2D) nanosheets can be a promising candidate as active material for high-performance supercapacitors (SCs) in the aspect of enhanced specific capacitance and stability. In a three-electrode system using 1 m KOH as electrolyte, the fabricated flake-like NiCo-MOF electrode exhibits high-specific capacitance (1107.3 F g− 1 at 1 A g− 1), good rate performance (76.7% retention of its highest capacitance at 10 A g− 1) and long-term cycling stability (70.1% capacity retention after 5000 cycles at 15 A g− 1). Furthermore, an energy storage device based on reduced graphene oxide and flake-like NiCo-MOF shows a maximum energy density of 30.81 Wh kg− 1 at a power density of 749.9 W kg− 1 with high capacitance retention of ~ 85.3% (up to 5000 cycles at 15 A g− 1).
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This study was funded by Fundamental Research Funds for the Central Universities (No. 2019XKQYMS01).
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Zhang, X., Wang, J., Ji, X. et al. Flake-like nickel/cobalt metal-organic framework as high-performance electrodes for supercapacitors. J Mater Sci: Mater Electron 31, 16260–16268 (2020). https://doi.org/10.1007/s10854-020-04174-0
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DOI: https://doi.org/10.1007/s10854-020-04174-0