| Popis: |
This study addresses the inferior performance of assembled supercapacitor devices, which can be attributed to the sluggish kinetics and poor structural stability of positive electrodes and lower capacitance of carbon-based negative electrodes. To overcome this challenge, we propose a sustainable approach that utilizes Ag embedded CoFe-Phosphate (CFPAg) and Ti3C2 MXene as positive and negative electrodes, respectively, to fabricate a hybrid supercapacitor (HS) device. The CFPAg sample, composed of porous nanoflakes decorated with nanospheres of CoFe-phosphate material, is binder-free deposited on Ni-foam using a facial hydrothermal route. In contrast, the MX sample is synthesized via a chemical route and deposited on Ni-foam as the negative electrode. Our results show that the CFPAg electrode exhibits a specific capacity of 1021 mF/cm2 with 80.5% cyclic stability over 10,000 cycles, while the MX electrode shows a specific capacity of 177.6 mF/cm2 with a cyclability of 84.7% over 10,000 cycles. The HS device, fabricated using CFPAg and MX electrodes, exhibits an areal capacitance of 79.6 mF/cm2 and provides excellent cyclic stability of 96% measured over ~39,000 cycles, with 12.43 μWh/cm2 energy at 0.75 mW/cm2 power density measured at 2 mA/cm2 applied current. Our work serves as a foundation for developing a range of electrode materials for next-generation energy storage devices, offering a sustainable and effective solution to improve supercapacitor device performance and longevity. |
