Dear Colleagues,

In our daily lives, energy is consumed a lot in homes, workplaces, and communities in which complex networks or social relations exist. Therefore, energy demand can be a cause of social and political unrest. A growing focus in energy research is to find strategies to promote shifts toward a sustainable energy future, in which the integration of two-dimensional (2D) materials in batteries, thermoelectric, supercapacitors, photovoltaics, photocatalysis, and devices for energy harvesting offers opportunities to tackle challenges in energy applications. Various 2D crystals, such as graphene, black phosphorus, transition metal dichalcogenides (e.g., MoS₂, MoSe₂, WSe₂), and MXenes, have flexibility, a large surface area, and chemical stability, which, combined with their excellent electrical and thermal conductivities, make them promising for portable and wearable energy devices. In addition, the advantage of using the 2D crystals is the possibility of designing and creating extremely large “artificial” structures based on van der Waals heterostructures. This approach can tune new properties in a material that can address emerging energy needs.

Here, we especially invite researchers to submit original and review papers related to two major sections for applying the 2D crystals: (1) energy conversion (thermoelectrics, photovoltaics, photocatalysts or fuel cells) and (2) storage (batteries, hydrogen storage, or supercapacitors). Beyond the two major sections, in this Special Issue, we also would like to invite contributions in other emerging energy applications such as water splitting and piezoelectric-based energy generators to reflect the broad field of the energy applications. Therefore, we very much look forward to your valued contributions to this Special Issue.

Dr. Nguyen Tuan Hung
Dr. Ahmad Ridwan Tresna Nugraha
Prof. Dr. Teng Yang
Dr. John Parthenios
Guest Editors

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• 2D materials for thermoelectrics
• 2D materials for photocatalysis
• 2D materials for photovoltaics
• 2D materials for energy storage
• Piezoelectricity of 2D materials for mechanical energy harvesting
• Theory and modeling of 2D materials and related energy applications