As global population growth and economical development continue to ramp up, sustainable energy supply is emerging among the top issues and challenges for humanity. In addressing this challenging issue, innovative materials are essential enablers for efficient energy conversion and energy storage systems. As a satellite symposium of the Centenary RACI, IChemE and Carbon Conference on 23-28^th July in Melbourne, this symposium aims to bring together a number of top scientists from various countries to discuss the latest advances in functional materials for sustainable energy conversion and storage technologies.