Fabrication of a poly( o -toluidine- co -aniline)/SiO 2 nanocomposite for an electrochemical supercapacitor application
- PDF / 2,359,791 Bytes
- 17 Pages / 595.276 x 790.866 pts Page_size
- 16 Downloads / 229 Views
RESEARCH ARTICLE
Fabrication of a poly(o-toluidine-co-aniline)/SiO2 nanocomposite for an electrochemical supercapacitor application Aisha A. Ganash1 · Nuha A. Alhebshi2 · Najwa H. Alyoubi1 Received: 12 April 2020 / Accepted: 13 July 2020 © Springer Nature B.V. 2020
Abstract A poly(ortho toluidine-co-aniline)/SiO2 nanocomposite electrode (Poly(oT-co-ANI)/SiO2) was fabricated in one step using electrodeposition polymerization. The polymer layer was characterized using UV–Vis spectroscopy, FTIR spectroscopy, and SEM/EDX. The electrochemical performance of the nanocomposite electrode was tested in 1 M H2SO4 using cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and the galvanostatic charge/discharge (GCD) technique. The Poly(oT-co-ANI)/SiO2 NC electrode presented a higher specific capacitance (87.79 F g−1 at 0.2 A) than the homopolymer PoT (29.5 F g−1 at 0.2 A). Thus, the specific capacitance of nanocomposite is three times greater due to large surface area and high porosity of the active material. Finally, the asymmetric full cell of Poly(oT-co-ANI)/SiO2 || graphene was tested and exhibited a maximum power of 4.25 W kg−1 and energy storage capacity of 1.7 W h kg−1. Graphic abstract
Keywords Supercapacitor · SiO2 nanoparticles · Conducting polymer · Electropolymerization · Specific capacitance.
Extended author information available on the last page of the article
13
Vol.:(0123456789)
1 Introduction Currently, the focused interest in energy storage and delivery devices, such as batteries and supercapacitor, is increasing rapidly [1]. The supercapacitor is classified into two types [2]. The first type is a pseudocapacitor or redox supercapacitor that stores energy through the faradic reversible reaction via the charge/discharge process [3]. This type includes conducting polymers such as polyaniline (PANI), polypyrrole (PPy), polythiophene (Pth), and their derivatives [4–8], as well as the polymer nanocomposite [9–13]. The second type is known as an electrical double-layer capacitor that stores energy at the electrode | solution interface. This type consists of Carbon nanotubes [14], activated Carbon [15], graphene nanosheets [16], and black Carbon [17]. The supercapacitor has attracted most attention in the last few years because of its promising properties as a source of power fills the gap between traditional capacitor, fuel cell and battery [18]. The conducting polymer is considered a good candidate for the supercapacitor to conduct electricity due to its low bandgap, the presence of conjugate π electrons ranging from semiconducting to metallic performance, and the simple and low-cost synthesis method [1]. Among the conducting polymers, PANI has attracted increasing attention in the supercapacitor research field due to its high conductivity and excellent environmental stability. Poly ortho-toluidine (PoT) is a derivative of PANI with a substituted methyl group at the ortho position that displays lower electrical conductivity than PANI [19]. One of the limitations of using the cond
Data Loading...
