Coaxial Fiber Supercapacitor Using All-Carbon Material Electrodes

Abstract

We report a coaxial fiber supercapacitor, which consists of carbon microfiber bundles coated with multiwalled carbon nanotubes as a core electrode and carbon nanofiber paper as an outer electrode. The ratio of electrode volumes was determined by a half-cell test of each electrode. The capacitance reached 6.3 mF cm(-1) (86.8 mF cm(-2)) at a core electrode diameter of 230 μm and the measured energy density was 0.7 μWh cm(-1) (9.8 μWh cm(-2)) at a power density of 13.7 μW cm(-1) (189.4 μW cm(-2)), which were much higher than the previous reports. The change in the cyclic voltammetry characteristics was negligible at 180° bending, with excellent cycling performance. The high capacitance, high energy density, and power density of the coaxial fiber supercapacitor are attributed to not only high effective surface area due to its coaxial structure and bundle of the core electrode, but also all-carbon materials electrodes which have high conductivity. Our coaxial fiber supercapacitor can promote the development of textile electronics in near future.

Orange-Peel-Derived Carbon: Designing Sustainable and High-Performance Supercapacitor Electrodes

“…We compared these values to previously reported supercapacitors based on other forms of carbon (inset Figure 6d). For example, the energy and power performance of polyaniline-deposited CNT (50.98 µWh/cm 2 at 28.404 mW/cm 2 ) [70], a graphene oxide-polypyrrole composite (16.8 µWh/cm 2 at 0.08 mW/cm 2 ) [71], a polypyrrole-MnO2-CNT coated cotton thread (33 µWh/cm 2 at 0.67 mW/cm 2 ) [72], CNT-coated carbon microfiber (9.8 µWh/cm 2 at 0.189 mW/cm 2 ) [73], and graphenecellulose paper (1.5 µWh/cm 2 at 0.01 mW/cm 2 ) [74] were inferior to our work. The high power capability of the OPAC-1 supercapacitor indicates its potential for applications where rapid release of energy is required.…”

Nano-Network Conducting Polymers as Superior Electrodes for Supercapacitors

“…Depending on the mechanism of charge storage, either the supercapacitors will store the energy at the interface between the electrode and electrolyte and it is kwon as electrical double layer capacitors (EDLCs) or it will store the energy through the utilization of the faradic reactions and known as pseudocapacitors (Beidgahi and Gogotsi 2014, Simon and Gogotsi 2008, and Le et al, 2013.…”

“…al, 2013 and, conducting polymers Reddy et. al, 2014), carbon materials (Kim et. al, 2013 andXiao et.…”

Fabrication and characterization of smart fabric using energy storage fibres

“…Recently, some attempts have been made to manufacture flexible and weaveable supercapacitors (Bae et al, 2011;Cherenack, Zysset, Kinkeldei, Münzenrieder, & Tröster, 2010;Fu et al, 2012;Harrison et al, 2013;Jost et al, 2011; * Corresponding author. Email: yanmeng.xu@brunel.ac.uk Le et al, 2013;Milczarek, Ciszewski, & Stepniak, 2011;Pushparaj et al, 2007;Qiu, Harrison, Fyson, & Southee, 2014;Wang et al, 2011;Zhang et al, 2014). Bae et al (2011) developed a kind of novel fibre supercapacitor using ZnO nano-wires as electrodes, which showed a high specific capacitance of 2.4 mF/cm 2 and 0.2 mF/cm using polyvinyl alcohol (PVA)/H 3 PO 4 as the gel electrolyte.…”