Porous Nanocarbons with High Porosity Derived from the Combination of Fluorinated Polyimide and Metal-Organic Framework for Use as Energy Storage Electrodes
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In this study, we synthesized porous nanocarbon by hybridizing a metal-organic framework (MOF, specifically ZIF-8) and fluorinated polyimide (fPI), followed by carbonization. The resulting nanocarbon is nitrogen-doped and has a specific surface area of up to 1096 m2 g-1, making it highly suitable for high-performance supercapacitors. Notably, the porous nanocarbon based on the sample with 10 wt% of ZIF-8 to fPI shows a unique coexistence of nano/mesopores, enhancing mass transport and electrolyte ion diffusion within the electrode, resulting in high-rate performance at elevated specific currents. Moreover, this nanocarbon demonstrates outstanding durability; even after undergoing 4000 charge/discharge cycles, it maintains its initial performance and delivers substantial specific energy (10.7 Wh kg-1) and power (5 kW kg-1). The incorporation of MOF with fPI effectively enhances the porosity of the porous carbon, making it a promising platform for advanced energy storage electrodes.