Design of Polypyrrole/Polyaniline Double-Walled Nanotube Arrays for Electrochemical Energy Storage

Abstract

The novel hybrid polypyrrole (PPy)/polyaniline (PANI) double-walled nanotube arrays (DNTAs) were designed to exploit the synergistic effects and shape effects for supercapacitive energy storage. The PPy/PANI DNTAs showed large specific capacitance (Csp) of 693 F/g at a scan rate of 5 mV/s. The PPy/PANI DNTAs also exhibited good rate capability and high long-term cycle stability (less 8% loss of the maximum specific capacitance after 1000 cycles). The synergistic effects between PPy and PANI, the shape effects of nanotube arrays and double-walled nanostructures, and high utilization rate of electrode are crucial for the outstanding performance of PPy/PANI DNTAs. The large Csp, good rate capability, and high long-term cycle stability offered by the PPy/PANI DNTAs, make them promising candidate electrodes for high-performance supercapacitors.

CoNi2S4‐Graphene‐2D‐MoSe2 as an Advanced Electrode Material for Supercapacitors

“…Consequently, the foams dried at 120 °C for 12 h in a vacuum oven and the dried nickel foams were pressed to be a thin foil at a pressure of 10 MPa for 1 min. Cyclic voltammetry curves were obtained at various scan rates (5,10,20,50, and 100 mV s −1 ) in a potential window of 0-0.4 V. GCD curves were recorded at various current densities (1, 2, 5, 10, and 20 A g −1 ) in a potential window of 0-0.4 V. While in full cell test, the symmetric supercapacitor cell using filter paper as the separator was assembled to measure the device performances. The loading mass of the active materials on Ni foam current collector was controlled to be around 5 mg, and each working electrode had a geometric surface area of 1 cm 2 .…”

“…[1,2] However, its low energy density and cycling stability critically limit the practical applications. [3][4][5] Theoretically, the increase of energy density can be achieved by maximizing the specific capacitance and the operation voltage, which has been the main focus of recent reports on SCs, though great effort is still needed to further improve the energy density of SCs. [6] The improved cycling stability on hybrid electrodes containing electrical double-layer capacitance and pseudocapacitance components with 3D structures has been recently reported.…”

“…[7] This architecture of SCs can maintain the basic structural and sustain mechanical deformation during the redox process. [5,8] wileyonlinelibrary.com method. Finally, their electrochemical properties were thoroughly studied and a probable mechanism for the enhanced energy density and cycling stability was proposed.…”

Combined experimental and theoretical study of poly(aniline-co-pyrrole) oligomer

“…Among COPs; poly (o-phenylenediamine) (POPD) [9], poly (3, 4-ethylenedioxythiophene) (PEDOT), polyparaphenylene (PPP), polyparaphenylenevenylene (PPV), polythiophene (PT), polypyrrole (PPy) [10], and polyaniline (PANI) have been studied both theoretically [11,12] and experimentally for efficient synthesis, characterization and applications [13][14][15]. Physical, electronic and mechanical properties of the conducting polymers can be enhanced by doping, de-doping [12], nanotube additives, and copolymerization [16][17][18]. Poly(Ani-co-Py) doublewalled nanotube arrays for electrochemical energy storage (high-performance supercapacitor) have been fabricated by Z.…”

“…Poly(Ani-co-Py) doublewalled nanotube arrays for electrochemical energy storage (high-performance supercapacitor) have been fabricated by Z. -L. Wang et al [18]. Composites formation is another efficient way to tune the properties of COPs.…”