This symposium is dedicated to contributions regarding the development of materials applied to different forms of energy conversion and energy storage. Research areas related to hydrogen storage, secondary batteries, solar cells, photo-electrochemistry, fuel cells, catalysis and electrocatalysis, investigated by means of theoretical or experimental approaches, are welcome. Special emphasis is devoted to advanced materials and nanostructures for energy-related applications. This symposium brings together Brazilian and others experts in the world in several aspects of energy materials opening possibilities of valuable discussions of new concepts, trends and technologies of energy conversion and storage and is also a valuable opportunity to strength on-going collaborations, prospect new collaborations and build-up research networks.