Abstract
In this study, we have synthesized titanium dioxide nanoparticles (TiO2 NPs) into carbon nanofiber (NFs) composites by a simple electrospinning method followed by subsequent thermal treatment. The resulting composite was characterized by state-of-the-art techniques and exploited as the electrode material for supercapacitor applications. The electrochemical behavior of the as-synthesized TiO2 NPs assembled into carbon nanofibers (TiO2-carbon NFs) was investigated and compared with pristine TiO2 NFs. The cyclic voltammetry and charge–discharge analysis of the composite revealed an enhancement in the performance of the composite compared to the bare TiO2 NFs. The as-obtained TiO2-carbon NF composite exhibited a specific capacitance of 106.57 F/g at a current density of 1 A/g and capacitance retention of about 84% after 2000 cycles. The results obtained from this study demonstrate that the prepared nanocomposite could be used as electrode material in a supercapacitor. Furthermore, this work provides an easy scale-up strategy to prepare highly efficient TiO2-carbon composite nanofibers.
Highlights
The ever-increasing requirements for clean and sustainable energy have drawn intensive attention to the development of high-performance energy storage systems
Since the performance of the electrode materials governs the performance of the supercapacitor, the recent trend in research on supercapacitors has focused on the fabrication of highly efficient electrode materials with high energy density, which can maintain a high power density and cycling stability [1,3]
One of the strategies to enhance the performance of electrode materials is to integrate metal oxides into the different carbon-based nanostructures in order to achieve the combined effect of the pseudocapacitance materials with a double-layer capacitor [1,4]
Summary
The ever-increasing requirements for clean and sustainable energy have drawn intensive attention to the development of high-performance energy storage systems. Due to its good electrochemical activity and high specific energy density, TiO2 can be considered as a promising candidate for a supercapacitor electrode [9,10]. We have synthesized TiO2 NPs assembled into carbon nanofibers by an electrospinning process followed by a thermal treatment directly under an inert atmosphere and investigated the performance of the as-synthesized nanocomposite in a supercapacitor. This procedure requires the use of a polymer solution containing a TiO2 precursor. We believe that the synthesis procedure is especially attractive since it offers a promising method for the assembly of TiO2 in carbon fibers and significantly boosts the electrochemical performance of the composite
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