Implementing the infrastructure for universal access to sustainable energy is a critical scientific, technological and social challenge, which will require significant capacity building within developing and developed countries. This symposium will focus on the technologies and design of materials for sustainable renewable energy challenge. Contributions regarding the development of organic, inorganic, hybrid and nanomaterials applied to different forms of energy conversion and energy storage are expected. Research areas related to hydrogen storage, secondary batteries, solar cells, photo-electrochemistry, fuel cells, solar fuels, catalysis and electrocatalysis, experimental techniques and modeling and simulation of materials for energy; devices for energy storage, saving and conversion, and smart grids, as well as Waste-to-Energy innovative technologies, are welcome. Special emphasis is devoted on advanced materials and nanostructures, advanced characterization techniques, non-conventional synthesis and processing routes, and modeling of energy-related materials. This symposium brings together Brazilian and foreign researchers interested in different aspects of energy-related materials, opening possibilities for valuable discussions of new concepts, trends and technologies for energy conversion and storage. In particular, the energy challenge will be addressed using the recently launched UNESCO Chair MATECSS (Materials and Technologies for Energy Conversion, Saving and Storage) as platform and on-going international collaborations. This symposium welcomes attendees with different backgrounds such as chemistry, physics, engineering, biology and so on working in research topics related to energy materials. It is also a valuable opportunity to strength on-going collaborations, prospect new ones and build-up multidisciplinary research networks to foster a collaborative atmosphere and multidisciplinary picture in addressing the sustainable renewable energy challenge.