His research interests include novel electrochemical systems for energy storage and conversion (more specifically: primary and secondary batteries and fuel cells). In particular, he has been focused on explanation of complex charge transport and reaction mechanisms in these devices. Together with coworkers, he has invented various novels or significantly improved active materials. He has published about 214 articles in international journals, some of them in most prestigious journals, such as Nature Materials, Angewandte Chemie, Advanced Materials, and others. His works have been cited 8900 times (his H-index is 49). His group regularly cooperates with the most prestigious international research institutes as well as with prominent industrial partners, such as Brightsource, Alanod, Renault, Volvo, Saft, Honda, and others.