Abstract The escalating demand for sustainable and high-performance energy storage systems has intensified research into advanced batteries, supercapacitors, and hybrid devices for applications spanning electric vehicles, portable electronics, and renewable energy grids. While conventional lithium-ion batteries deliver high energy density, they are constrained by limited cycle life, thermal instability, and resource scarcity. In contrast, supercapacitors exhibit superior power density and cycling durability but suffer from lower energy storage capability. Recent progress in nanostructured materials including carbon-based nanostructures, metal oxides, polymer nanocomposites, and hybrid architectures has enabled substantial enhancements in energy and power densities, charge-discharge kinetics, ionic conductivity, and mechanical robustness. Material engineering strategies such as surface functionalization, morphology optimization, and synergistic hybridization significantly improve electrode-electrolyte interfaces, mitigate degradation mechanisms, and extend cycling stability. Furthermore, nanostructured electrodes and reinforced polymer electrolytes facilitate efficient ion/electron transport and mechanical flexibility, supporting next-generation energy storage technologies. This review critically surveys recent advances in material design, device architectures, and performance enhancement mechanisms, while addressing key challenges related to cost, scalability, and environmental sustainability. Future perspectives emphasize green synthesis routes, bio-based polymers, multifunctional nanocomposites.
Admase et al. (Mon,) studied this question.
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