Dr. Stefano Passerini is working on the development of materials and systems for electrochemical energy storage for almost 30 years. Following his PhD in chemistry from the University of Rome “La Sapienza” he worked as a senior scientist at the University of Minnesota, USA, and later at ENEA the Italian National Agency for New Technologies, Energy and Environment. In 2008 he moved to the University of Muenster where he was co-Founder and co-Director of MEET (Muenster Electrochemical Energy Technology) battery research centre. In 2014 he was appointed a Professor at the Karlsruhe Institute of Technology as a member of the Helmholtz Institute Ulm, Germany. His group, summing up to more than forthy Post-Doctoral fellows and PhD students, is involved in research projects funded by German and European funding Institutions as well as German and foreign industries. His research focusses on the fundamental understanding and development of materials for high-energy batteries and supercapacitors, such as ionic liquids, polymer electrolytes, and electrode materials. His present activities span from Li-ion (conversion-alloying anode materials, high capacity cathodes and green processing) and Na-ion (anode and cathode materials) batteries to Li-Air and Na-Seawater chemistries. Conventional and hybrid supercapacitors are also actively investigated. Co-author of over 350 peer-reviewed publications (H Index of 54), and several book chapters and patents, he received the Research Award of the Battery Division of the Electrochemical Society. From January 2015 he is Editor-in-Chief of the Journal of Power Sources after three years as European Editor.