Graphene, a two-dimensional (2-D) nanostructure of carbon, has attracted a great deal of attention since it was experimentally discovered in 2004. 1 Like carbon nanotubes, graphene sheets possess a high surface area to volume ratio and extraordinary electronic transport properties. 2 These properties make graphene very promising for many applications such as solar cells, sensors, batteries, supercapacitors, and hydrogen storage. 3,4 Carbon materials are widely used in lithium batteries, for example, disordered carbon, 5,6 hierarchically porous carbon monoliths, 7 and acid treated graphite. 8 The nanostructuring of electrode materials is a promising strategy to further improve the capacity of batteries. 9 Among various carbon nanostructures, carbon nanotubes (CNTs) have been widely studied as electrodes for lithium batteries since their unique structure should allow rapid insertion/removal of lithium ions. 10,11 Another active research direction in advanced batteries is to make batteries flexible, which could lead to important applications such as in wearable power sources.

, GG (2012), Polypyrrole coated nylon lycra fabric as stretchable electrode for supercapacitor applications, Electrochimica Acta, 68, Polypyrrole coated nylon lycra fabric as stretchable electrode for supercapacitor applications AbstractWearable electronics offer the combined advantages of both electronics and fabrics. Being an indispensable part of these electronics, lightweight, stretchable and wearable power sources are strongly demanded. Here we describe a daily-used nylon lycra fabric coated with polypyrrole as electrode for stretchable supercapacitors. Polypyrrole was synthesized on the fabric via a simple chemical polymerization process with ammonium persulfate (APS) as an oxidant and naphthalene-2,6-disulfonic acid disodium salt (Na 2 NDS) as a dopant. This material was characterized with FESEM, FTIR, tensile stress, and studied as a supercapacitor electrode in 1.0 M NaCl. This conductive textile could endure 1000 stretching cycles with 100% strain applied, and still retained its electrical conductivity and electrochemical properties. Interestingly, we also found that this material showed improved electrochemical properties when it was being stretched. ABSTRACTWearable electronics offer the combined advantages of both electronics and fabrics.

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