Supercapacitors studies on BiPO₄ nanoparticles synthesized via a simple microwave approach

Abstract

BiPO 4 nanomaterial was synthesized using EDTA (ethylene diamine tetra acetic acid) as the surfactant via a simple microwave method. The structure and morphology of BiPO 4 were systematically characterized by X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), and scanning electron microscopy (FE-SEM) studies. The obtained BiPO 4 nanoparticles were, on average, 150-300 nm. The electrochemical results showed that the specific capacitance of BiPO 4 obtained using the microwave route was up to 104 Fg −1 at a current density of 1 Ag −1 with a large potential window of 1.7 V. The material showed excellent cycling stability (92% capacitance retention) after 500 cycles at a current density of 1 Ag −1 .

Electrochemical analysis of Co3(PO4)2·4H2O/graphene foam composite for enhanced capacity and long cycle life hybrid asymmetric capacitors

“…Metal phosphates have been vastly and successfully adopted in catalysis applications [4][5] [6] over the years and are only being tested recently for energy storage applications [7], [8], [9], [10], [11]. However, the promising trend recorded has inspired further research into their electrochemical energy storage capability.…”

Role of thermal decomposition process in the photocatalytic or photoluminescence properties of BiPO4 polymorphs

“…The FTIR spectra of BiPO 4 calcined at different temperatures are shown in Figures 5 and 6. The FTIR bands of samples are attributed according to the bibliography (Romero et al, 1994; Vadivel et al, 2017; Zhao et al, 2011; Zhao, Li, Yang, Zheng, & Li, 2013; Zhu, Wang, Ling, & Zhu, 2017; Zhu, Zhang, Zhao, & Zhu, 2017). The observed absorption bands correspond to the different vibrations of the phosphate groups in the frequency range 489–630 cm −1 and 880–1,150 cm −1 .…”

“…In the literature, the most widely used methods for the preparation of bismuth phosphate BiPO 4 are as follows: hydrothermal reaction (Jianming, Weiren, Licai, & Jianqing, 2014; Wang, Guan, Li, & Li, 2012), solvothermal method (Vadivel et al, 2016; Xue et al, 2009), microwave synthesis (Li et al, 2011; Vadivel et al, 2017), and, sometimes, the electrospinning method (Liu, Liu, Lu, Sun, & Xiu, 2014).…”

Metal Phosphides and Phosphates‐based Electrodes for Electrochemical Supercapacitors

“…Microwave‐assisted hydrothermal heating is a green approach to synthesize materials in a shorter time and with lower power consumption, as a consequence of the direct and uniform heating . For example, the formation of BiPO 4 nanoparticles only required 3 min heating in microwave‐assisted hydrothermal process . In an alternative, chemical precipitation method has also been attempted for BiPO 4 .…”

“…Correspondingly, the specific capacitance of BiPO 4 electrodes was enhanced on increasing pH from 1 to 7, and reached a maximum specific capacitance of 1052 F g −1 at 2 mV s −1 at pH7. The rod‐like and porous structure facilitated easy diffusion of ions …”