The use of intrinsically conducting polymers (ICPs) like polythiophene (PTh), polypyrrole (PPy) and polyaniline (PANI) in devices and systems for electrochemical energy storage and conversion is briefly reviewed with a focus on an overview distinguishing between already established uses and potential applications. Basic principles in these three major fields are highlighted: ICPs as active masses. ICPs as conductance-enhancing additives. ICPs as auxiliary materials beyond conductance. (C) 2013 Elsevier Ltd. All rights reserved.