Next-Generation Pseudocapacitive and Hybrid Supercapacitors: From Nanoengineered Oxides to Sustainable Devices

Electrochemical energy storage lies at the heart of the global transition toward sustainable energy systems. Among the various storage technologies, supercapacitors have emerged as promising candidates due to their superior power density, rapid charge–discharge capability, and long cycle life. Within this field, pseudocapacitive and hybrid supercapacitors have gained enormous attention because they bridge the energy and power gap between traditional electric double-layer capacitors and batteries. Recent advances in nanoengineered transition metal oxides, conducting polymers, and carbon-based composites have led to considerable improvements in specific capacitance and stability. However, challenges persist in achieving both high energy density and long-term cycling performance while ensuring cost-effectiveness and environmental sustainability. Further understanding of surface redox mechanisms, ion diffusion kinetics, and electrode–electrolyte interactions is essential to unlock the full potential of next-generation supercapacitors.This Research Topic aims to gather cutting-edge studies and perspectives on the design, synthesis, and integration of advanced pseudocapacitive and hybrid supercapacitor materials and architectures. It seeks to bridge the knowledge gaps between fundamental electrochemical understanding, material engineering at the nanoscale, and scalable device development. Particular attention will be given to elucidating the correlations between material microstructure, electronic configuration, and electrochemical performance, as well as exploring sustainable strategies for material sourcing and fabrication. By integrating insights from experimental, theoretical, and computational approaches, this topic will contribute to accelerating the translation of laboratory innovations into next-generation, eco-conscious energy storage technologies.To gather further insights into the development of sustainable pseudocapacitive systems and hybrid supercapacitor devices, we welcome articles addressing, but not limited to, the following themes:-- Design, synthesis, and characterization of nanoengineered metal oxides, sulfides, phosphides, and MXenes for pseudocapacitive applications-- Hybrid supercapacitor architectures integrating battery-type and capacitive electrodes-- Mechanistic studies on interfacial charge storage, ion transport, and redox reactions-- Machine learning and computational modeling for performance prediction and material discovery-- Environmentally benign electrolytes and green synthesis routes for sustainable device manufacturing-- Scalable fabrication, structural optimization, and performance evaluation of prototype energy storage devices Topic editors: Dr. Rajkumar Srinivasan, Dr. Princy Merlin Johnson Source: https://www.frontiersin.org/research-topics/81117/next-generation-pseudocapacitive-and-hybrid-supercapacitors-from-nanoengineered-oxides-to-sustainable-devices