While the promise of clean energy from renewables is indisputable, their inherent variability and intermittent nature pose a critical challenge. To truly harness their potential, highly efficient energy storage solutions are urgently needed. This demand is further amplified by the growing need for high-performance batteries in portable electronics and electric vehicles. In that sense, our research focuses on designing and developing novel nanostructured materials for applications in electrochemical energy devices. These devices encompass a wide range, including "supercapatteries", supercapacitors, secondary batteries (e.g., Li-ion, Na-ion, K-ion, Mg-ion, Li-S, and Li-Se), Zn aqueous batteries, and all-solid-state batteries.