The field of energy textiles is still new and growing with most of the cited literature coming within the last 4-5 years. In this work we investigated the specific capacitance of commercially available nonwoven and knitted cotton textiles that had been modified with a conductive carbon coating and 3-D carbon nanotube/graphene ‘felt’ with and without the addition of redox reactive nanoparticles. Nonwoven materials were investigated due to inherent properties such as flexibility and high surface area that could contribute additional energy storage capacity. These substrates were coated with varying permutations of carbon based coatings (carbon nanotubes and graphene oxide). The transition metal, iridium oxide, was electrodeposited as nanoparticles of less than 2 nm in size to serve as a supplemental redox active component for increased energy capacitance. Studies were conducted on the application and electrical properties of these iridium oxide nanoparticles when integrated in a 3-D fibrous electrode configuration, monitoring the increase in capacitance in textile based energy storage and performance devices (charge and discharge) for low power applications. Coated textile platforms were characterized using SEM and digital optical microscopy for coating association/adhesion on the fibers. Cyclic voltammetry was used to measure electron transfer properties and specific capacitance/gram of textile. Additionally we measured electrical resistance, air permeability, and charge/discharge rates. Results show up to a 5x increase in specific capacitance over the coated textile alone with the added deposition of iridium oxide nanoparticles and the highest specific capacitance was found in the 3-D carbon nanotube/graphene felt. These high surface area materials are being developed to potentially serve as the electrode platform component in a novel textile capacitor.

3-Dimensional nonwoven and textile substrates associated with iridium oxide nanoparticles for the improvement of specific capacitance

253rd National Meeting (2017)

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