Our goal is to gain a fundamental understanding of the interplay between ionic transport and material structure in the battery and fuel cell electrode and electrolyte materials. Unfortunately, computational methods which can provide this understanding are lacking because transport in these devices span multiple length and time scales, ranging from atomic scales to centimeters, and from picosecond to hour time scales. While continuum are computationally inexpensive, they do not predict the transport properties accurately. On the other hand, atomistic methods are computationally very expensive for studying this multiscale phenomena. State- of-the-art multiscale modeling techniques developed in our research group overcome these challenges and will be employed to study ionic transports in energy storage and conversion materials.