In this era of global connectivity and electric technology, energy storage and conversion have emerged as foundational cornerstones, propelled by the symbiotic relationship between environmental sustainability and economic advancement. The worldwide need for long-lasting and fast-paced energy storage devices has accelerated immense research on investing viable resources to develop high-performing, cost-effective and eco-friendly energy conversion and dispatchable energy storage electrochemical devices. Electrochemical capacitors, generally referred to as supercapacitors, are considered effective complementary to conventional batteries for energy storage to deliver high-power and high-energy densities, expeditive charge/discharge rates, prolonged cycle life, and economically viable maintenance costs. These supercapacitors effectively address the practical challenges and bridge the performance gap between traditional electrolytic capacitors, which deliver high power but low energy, and Li-ion batteries, known for high-energy storage but low-power capabilities . These wholesome features make supercapacitors an ideal contender for high-power applications that demand fleet-footed response, inclusively unintermitted power stream, portable electric devices, hybrid electric automobiles, power back-up devices, armed weapons, aerospace apparatus, etc . However, the predicted theoretical energy density values have not yet been achieved within the current realm of supercapacitors, which does temper their potential for widespread commercial deployment. As research continues to push the boundaries of supercapacitor capabilities, the aspiration to achieve and even surpass predicted theoretical energy density values, all while maintaining power density and cyclic life, remains steadfast. Overcoming this challenge is pivotal for unlocking broader expertise and investment confidence in the realm of large-scale commercial applications.