Dear Colleagues,

The rapid depletion of fossil fuels and the escalating global demand for clean, sustainable energy have intensified the search for advanced electrochemical energy storage systems. Among these, supercapacitors and rechargeable batteries stand out as pivotal technologies for applications ranging from portable electronics and electric vehicles to grid-scale energy storage. However, the performance of these devices is fundamentally limited by the properties of their electrode materials. In this context, chalcogenides and two-dimensional (2D) materials have emerged as promising candidates capable of overcoming the intrinsic limitations of conventional electrodes.

Chalcogenides, including transition metal sulfides, selenides, and tellurides, exhibit high theoretical specific capacities, tunable electronic structures, and rich redox chemistry, making them attractive for both battery-type and pseudocapacitive energy storage. Meanwhile, 2D materials such as MXenes, transition metal dichalcogenides (TMDs), graphene, phosphorene, and layered double hydroxides offer exceptional surface area, superior electrical conductivity, and mechanical flexibility, enabling fast ion transport and high-rate performance. The synergistic integration of chalcogenides with 2D architectures has recently opened new frontiers in electrode design, yielding hybrid structures with enhanced energy density, power density, and cycling stability.

This Special Issue aims to bring together original research articles, comprehensive reviews, and short communications that highlight recent breakthroughs, fundamental insights, and future perspectives on chalcogenide and 2D materials for next-generation energy storage devices.

Topics of interest include, but are not limited to:

· Synthesis and characterization of chalcogenide nanostructures (sulfides, selenides, tellurides)

· 2D materials (MXenes, TMDs, graphene, phosphorene, h-BN, layered oxides)

· Hybrid and heterostructured electrodes combining chalcogenides with 2D materials

· Supercapacitors (EDLCs, pseudocapacitors, hybrid capacitors)

· Metal-ion batteries (Li, Na, K, Zn, Mg) and metal-air batteries

· Electrocatalysis for energy conversion and storage

· Interface engineering and defect engineering for enhanced electrochemical performance

· In-situ/operando characterization techniques

· Computational and machine learning approaches for materials discovery

· Scalability, sustainability, and commercialization challenges

We welcome contributions from researchers worldwide and look forward to assembling a collection that advances the fundamental understanding and practical application of chalcogenide and 2D materials in energy storage.