We aim to develop novel energy materials that are essential for the next generation electrical energy storage and conversion. We perform fundamental research on understanding how the interplay between surface chemistry and electrochemical potential directs the formation, transformation and stabilization of energy materials, and developing innovative approaches to synthesize materials with structure and property controlled across multiple length scale.We further study the energy applications of these novel materials by assembling and testing various electrochemical devices such as batteries and fuel cells. Some applications that we are currently interested in are high energy density rechargeable batteries that use multivalent ions as the charge carrier, and electrocatalysts that could efficiently convert electricity into chemicals and energy-dense liquid fuels.