Energy has been the cornerstone of sustainable development of our economy and society. The dramatic demand on energy supply to be as unrestricted as possible, however, leads to conflicting feedback loops on the ecological environment. Thus, research is appealing worldwide to diminish the negative environmental consequences of energy consumption. This includes energy saving, generation, harvest, conversion, and storage. Nanomaterials and nanostructures provide unique mechanical, electrical, and optical properties and have played an important role in recent advances in energy-related applications.

In this special issue, we invite researchers to contribute original research papers and review articles covering current progress on the preparation and the usage of nanomaterials for energy-related applications. In these aspects, we will cover a broad range of subjects from nanomaterial synthesis, characterization to energy-related demonstration and relevant technologies and devices, such as solar cells, thermoelectronics, piezoelectronics, solar water splitting, hydrogen production/storage, batteries, and supercapacitors.

Potential topics include, but are not limited to:

• Novel synthesis and characterization of energy-related nanomaterials, including 0D, 1D, 2D, and hybrid architectures
• Recent development of nanomaterials for energy consumption
• Recent development of mechanism for energy storage and conversion
• Recent development of nanomaterials for energy-related applications, including energy saving, harvest, conversion, and storage. For example, the electrochemical energy storage covers Li-ion batteries, Li-S batteries, Li-air batteries, and all-solid-state batteries and supercapacitors