During the last two decades, renewable materials and their composites derived from biomass resources have attracted a great deal of attention for their various applications, which are highly economical and environmentally benign in nature. Recently, a number of effective processes have been developed for the fabrication of advanced functional materials from biomass precursors that enabled excellent physical and chemical properties in the materials. These properties have been proved to be highly compatible and synergistic interaction for their diverse applications in several areas, especially for energy storage applications. But the development of innovative methodologies to convert biomass into useful and innovative materials and composites is still a significant challenge. Thus, we emphasize the utilization of different raw biomass or biomass-derived precursors for the synthesis of energy storage materials and their composite materials, functionalization of those materials to make advanced systems and their emerging applications in energy storage fields, such as supercapacitors, hydrogen production and storage, lithium-ion batteries, sodium/potassium-ion batteries, lithium–sulfur batteries, metal–air batteries and so on.

This Special Issue of “Advanced Renewable Energy Storage Materials and their composite: Preparation, Characterization and Applications” covers general topics on energy storage materials and composites based on renewable material precursors. The scope of this issue can be expanded from the synthesis and design of energy storage materials and composites to the fabrication and applications of these materials. Interdisciplinary approaches are also much welcomed. This issue will publish full research papers and reviews. Areas to be covered in this Research Topic may include, but are not limited to:

• innovative materials and composites synthesis from renewable materials

• innovative methodologies to convert renewable material into energy storage materials

• simulation and computational materials (Density Functional Theory, First-principles Calculations, Monte Carlo simulation, Molecular Dynamics, etc….)

• energy storage materials and devices (hydrogen production and storage, supercapacitors, Batteries, fuel cells, etc….)