The current energy crisis has placed increased interest in all aspects related to electrical energy generation, conversion and storage with particular emphasis on fuel cells, batteries and supercapacitors. Clearly these are all electrochemical interfaces and thus our discipline has been put front and center in the energy landscape. Addressing these aspects represents the primary objective of this special issue which covers numerous aspects related to the above-mentioned research areas. In the general subject of fuel cells, this special issue presents contributions dealing with various aspects of electrocatalysis including transport effects (Lindstroma et al.) as well as the electrooxydation of hydrogen (Zhuang et al.) and ethylene glycol (Behm et al.). Studies of the oxidation of CO (González et al. and Herrero et al.) on Pt aggregates as well as the study of CO tolerance pathways on Pt–Ru electrodes (Ticianell et al.) provide additional insights into this most important process. In batteries, Novak et al. presents a novel approach to the determination of lithium ion mobility while Zhang et al. discuss the effects of Mg doping on the performance of Li2FeSiO4 while in supercaps, Rolison et al. discuss the effects of temperature and atmosphere on the performance of electrochemical capacitors. All of these contributions, from well-recognized leaders, constitute a volume of great currency and relevance that will be of great value and interest to the electrochemical community, in general, and to those involved in electrochemical energy generation and storage, in particular.