High-performance flexible-film supercapacitors of layered hydrous RuO2/poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) through vacuum filtration

A micron-thick flexible layered RuO2 center dot 1.18H(2)O/PED0T-PSS film with high electric conductivity of about 306 S cm(-1) (sheet resistance of film of 7.1 Omega sq(-1)) was prepared using commercial PEDOT-PSS dispersion and RuO2 center dot 1.18H(2)O nanoparticles through a simple, low-cost vacuum filtration technology. The layered flexible film could be used as a rope to hang up 300 gram weight and as a conducting wire in a circuit to light a blue LED lamp. The symmetrical supercapacitor based on the layered flexible films showed high specific capacitance of 591 Fg(-1) (volumetric specific capacitance of 530 F cm(-3)) at 10 mV s(-1), excellent long-term cycling stability (capacitance retention of 91.5%) after 5000 cycles, and high energy density of 18 Wh kg(-1) at high power density of 5000 W kg(-1). The flexible film as function as current collector and active material simultaneously will have practical application in miniaturized flexible supercapacitors. (C) 2018 Elsevier Ltd. All rights reserved.