In the process of saving energy and reducing consumption, we will encounter various problems worldwide. Promoting the transformation of energy usage and solving these problems requires a new approach in the new era. With the introduction of a series of industrial support policies in various countries, new energy materials have very broad prospects for development.

New energy generally refers to renewable energy developed and utilized on the basis of new technology, including solar energy, biomass energy, water energy, wind energy, geothermal energy, wave energy, ocean current energy, tidal energy, and the heat cycle between the surface and depth of the ocean, etc. In addition, there is hydrogen, biogas, alcohol, methanol, etc. Coal, oil, natural gas, water energy, etc., which have been widely used, are known as conventional energy. With the limited nature of conventional energy and the growing environmental problems, new energy with the characteristics of environmental protection and renewable energy is getting more and more attention globally. New materials refer to the newly developed or under-developed materials with superior performance to traditional materials. New material technology is a series of research processes such as physical research, material design, material processing, testing, and evaluation to create new materials that meet various needs.

This Special Issue focuses on the application of new energy materials in energy conservation, environmental protection, and economy, addressing both new technology and policy evaluation. We seek original research and review articles from leading researchers and practitioners in academia and industry on a variety of theoretical and applied issues in this field.

Potential topics include but are not limited to the following:

• Environmental protection and renewable energy materials
• Saving energy and reducing consumption
• Solar materials
• Biomass energy materials
• Water energy materials and engineering
• Wind energy materials and engineering
• Sustainable energy materials
• Energy materials and engineering