摘要：Hydrated Ammonium metal phosphates(AMPs) with more electractive site and the intercalated water are the current research focus in the field of supercapacitor. Herein, we development a novel approach that Co-MOF(ZIF-67) as a precursor was introduced into the confine space of MXene layer and as-prepared MOF/Ti3C2Tx was subsequent in-situ etched in a solution of (NH4)2HPO4 to transform into NH4CoPO4?H2O nanoparticles with uniform distribution on the surface of Ti3C2Tx. NH4CoPO4 nanoparticles were embedded into the MXene nanosheets, while the Ti3C2Tx MXene endows the AMPs with high electronic conductivities. Benefiting from the synergistic effect of NH4CoPO4?H2O and MXene, this material shows good rate performance (601 F g-1 at 1.0 A g-1 and 535 F g-1 at 20.0 A g-1) and long cycle life (87% of capacitance retention up to 5000 times cycle at 5 A g-1) in three-electrode system, which can be ascribed to excellent electronic conductivity and short ion transport path. When assembled NH4CoPO4?H2O/Ti3C2Tx and activated carbon into asymmetric supercapacitors (ASC), the ASC simultaneously shows high energy density (47 Wh kg-1 at 1350 W kg-1 and power density (18 Wh kg-1 at 5000 W kg-1), which can be considered as a potential candidate for next-generation energy storage devices.
文章鏈接：https://doi.org/10.1039/D1NJ01394G