Abstract
Energy conversion and storage through electrochemical devices, such as fuel cells and batteries, are called to play an important role for the development of future sustainable energy networks. With the impressive progress reached by the computational facilities in the recent past years, physical modeling and numerical simulation start nowadays to be recognized as crucial tools for the understanding-based, and thus controllable-based, development of efficient, stable and inexpensive energy conversion and storage materials and components, and the optimization of the operation conditions at the device level. This book chapter comprehensively covers both theoretical and practical aspects of multiscale modeling of electrochemical power generators.