A high performance PEDOT/PEDOT symmetric supercapacitor by facile in-situ hydrothermal polymerization of PEDOT nanostructures on flexible carbon fibre cloth electrodes. (December 2017)

• Record Type: Journal Article
• Authors: Rajesh, Murugesan; Raj, C. Justin; Manikandan, Ramu; Kim, Byung Chul; Park, Sang Yeup; Yu, Kook Hyun
• Is Part Of: Materials today energy. Volume 6(2017)
• Page Start: 96
• Page End: 104
• Publication Date: 2017-12
• Subjects: Symmetric supercapacitor -- Flexible electrode -- High rate capability -- In-situ hydrothermal polymerization; Energy development -- Periodicals; Energy industries -- Periodicals; Power resources -- Periodicals; Energy policy -- Periodicals; Energy development; Energy industries; Energy policy; Power resources; Electronic journals; Periodicals; 621.042
• DOI: 10.1016/j.mtener.2017.09.003
• Languages: English
• ISSNs: 2468-6069

Abstract

Abstract: Achievement of conducting polymer based symmetric supercapacitor with high specific capacitance and long cyclic stability is a very challenging and a complicated approach. Generally, the specific capacitance and stability of the conducting polymer system have been improved by forming composite with metal oxides or carbon based nanomaterials. In this present work, we demonstrated a simple and straightforward strategy for the deposition of bare PEDOT nanostructures on flexible 3D carbon fibre cloth (CFC) via in situ hydrothermal polymerization technique. The hydrothermally polymerized electrodes were easily assembled into PEDOT/PEDOT symmetrical supercapacitor without using any organic binders and conductive additives. This symmetric supercapacitor exhibited significantly high specific capacitance of 203 F g −1 at 5 mV s −1 scan rate with high energy density of 4.4 W h kg −1 and power density of 40.25 kW kg −1 in 1 M H2 SO4 electrolyte, which is highest value reported for this material as a symmetric device. More importantly, the formation of 3D PEDOT nanostructure with flexible carbon cloth affords an efficient and stable electrode for facile electron transfer in symmetrical supercapacitor and delivered a long device stability with capacitance retention of ∼86% after 12, 000 charge/discharge cycles. Graphical abstract: A facile and economical fabrication of binder free PEDOT nanostructured supercapacitor electrodes were proposed by dynamic in situ hydrothermal polymerization technique. Highlights: Direct method for the fabrication of PEDOT symmetric supercapacitor by hydrothermal polymerization. Assembled device shows remarkable electrochemical performances with higher capacitance and better rate capability. Promising energy and power densities and excellent cyclability.