Abstract

In recent years, metal-organic frameworks (MOFs) garnered the attention of researchers in the field of energy storage, which has the specific traits of a high surface area and a stable porous structure. Here, zeolitic imidazole framework-8 (ZIF-8) were embedded with antimony trioxide (Sb2O3). The ZIF-8@Sb2O3 nanocomposite (ZFSB NC) was prepared using a solvothermal method. From the XRD study, it was observed that the prepared ZFSB NC exhibits a high degree of crystallinity along with a relatively small crystallite size. The functional groups present in the prepared materials were confirmed through FTIR analysis. The ZFSB NC exhibits a core-shell-like morphology owing to the incorporation of Sb2O3 on the surface of ZIF-8. The BET analysis demonstrated that the surface area of the NC is 362.27 m2/g. The electrochemical performance of the fabricated electrodes were investigated using a three-electrode setup with 2 M KOH as an electrolyte solution. The obtained specific capacity of ZFSB NC is 480 C/g at a scan rate of 10 mV/s and 234.6 C/g at 1 A/g, which corroborates with the synergistic effect of Sb2O3 and ZIF-8, Distinctive morphology and high surface area of ZFSB NC. This elevated specific capacity of ZFSB NC occurs due to the lower RCT and RS values, which are 0.034 and 0.629 ?. ZFSB NC has a capacitive retention of 85.3 % after 3000 continuous charge/discharge cycles. The fabricated ASC device ZFSB NC//AC delivers a high specific capacity of 209.2 C/g at a scan rate of 10 mV/s. The device exhibits an elevated energy and power density of 29.28 Wh/Kg and 8000 W/Kg. Therefore, the ZFSB NC is a superior electrode material compatible with future energy storage applications. © 2025 Elsevier Ltd