The drive to produce materials for energy management devices that can withstand large and repeated strains/stresses calls for mechanically lightweight robust electrodes and current collectors. In this Perspective, Vilatela and Marcilla explore the use of fibers of carbon nanotubes as ideal current collectors/active material for light-weight, tough energy management devices. The image on the cover shows an electron micrograph of an array of long, aligned CNTs and a scheme of a supercapacitor with fiber electrodes. For more information, see “Tough Electrodes: Carbon Nanotube Fibers as the Ultimate Current Collectors/Active Material for Energy Management Devices” by Juan J. Vilatela* and Rebeca Marcilla (Chem. Mater. 2015, 27, 6901–6917). View the article.