Energy storage and conversion technologies are central to achieving sustainable and carbon-neutral societies. Conventional battery and capacitor systems, while widely used, face challenges including limited stability, mechanical rigidity, and environmental concerns in their manufacturing and operation. To address these issues, polymers and hybrid materials have attracted growing interest as versatile platforms with tunable properties and broad design flexibility. Their ability to combine structural adaptability, ionic transport, and multifunctionality has opened new pathways for improving device performance and reliability. This rapidly advancing field now spans from molecular-scale design principles to device-level integration, bridging chemistry, materials science, and engineering. The integration of novel material architectures, hybrid organic–inorganic systems, and emerging energy device concepts highlights the transformative potential of polymer and hybrid platforms for next-generation energy technologies. This session will bring together leading researchers to share progress in synthesis, characterization, modeling, and scalable processing, aiming to connect fundamental insights with industrial and societal needs.