Enhanced supercapacitor performance using NbSn-MOF@GQDs hybrid material: a novel approach for high energy storage and improved electrochemical properties

Hybridizing batteries and supercapacitors is an innovative and promising way to meet the growing requirements of high energy and power densities in different energy storage devices. These devices have multifunctional behavior, with excellent electrochemical properties and the ability to address the limitations of conventional devices. The novel nanocomposites of NbSn-MOF@GDSs have been synthesized and studied with promising energy storage properties in the present research work. The morphological and electrochemical studies were performed for the prepared nanocomposite electrodes. The prepared material showed a great specific capacity of 423.8 mAh/g (1530.3 C/g) at a current density of 1.2 A/g with an outstanding cyclic stability of 87.1% and 81.6% capacitive retention after 5000 cycles and energy density (E_d) of 65 Wh/kg and power density (P_d) of 1400 W/kg. These findings advocated that the NbSn-MOF@GQDs-based battery hybrid supercapacitors can have potential applications in electronics, wearable, and implantable devices due to their suitability for mass production along with environmental safety.