A Novel Synthesized 1D Nanobelt-like Cobalt Phosphate Electrode Material for Excellent Supercapacitor Applications

oleh: S. K. Shinde, Monali B. Jalak, Swapnil S. Karade, Sutripto Majumder, Mohaseen S. Tamboli, Nguyen Tam Nguyen Truong, Nagesh C. Maile, Dae-Young Kim, Ajay D. Jagadale, H. M. Yadav

Format: Article
Diterbitkan: MDPI AG 2022-11-01

Deskripsi

In the present report, we synthesized highly porous 1D nanobelt-like cobalt phosphate (Co<sub>2</sub>P<sub>2</sub>O<sub>7</sub>) materials using a hydrothermal method for supercapacitor (SC) applications. The physicochemical and electrochemical properties of the synthesized 1D nanobelt-like Co<sub>2</sub>P<sub>2</sub>O<sub>7</sub> were investigated using X-ray diffraction (XRD), X-ray photoelectron (XPS) spectroscopy, and scanning electron microscopy (SEM). The surface morphology results indicated that the deposition temperatures affected the growth of the 1D nanobelts. The SEM revealed a significant change in morphological results of Co<sub>2</sub>P<sub>2</sub>O<sub>7</sub> material prepared at 150 °C deposition temperature. The 1D Co<sub>2</sub>P<sub>2</sub>O<sub>7</sub> nanobelt-like nanostructures provided higher electrochemical properties, because the resulting empty space promotes faster ion transfer and improves cycling stability. Moreover, the electrochemical performance indicates that the 1D nanobelt-like Co<sub>2</sub>P<sub>2</sub>O<sub>7</sub> electrode deposited at 150 °C deposition temperature shows the maximum specific capacitance (Cs). The Co<sub>2</sub>P<sub>2</sub>O<sub>7</sub> electrode prepared at a deposition temperature 150 °C provided maximum Cs of 1766 F g<sup>−1</sup> at a lower scan rate of 5 mV s<sup>−1</sup> in a 1 M KOH electrolyte. In addition, an asymmetric hybrid Co<sub>2</sub>P<sub>2</sub>O<sub>7</sub>//AC supercapacitor device exhibited the highest Cs of 266 F g<sup>−1</sup>, with an excellent energy density of 83.16 Wh kg<sup>−1</sup>, and a power density of 9.35 kW kg<sup>−1</sup>. Additionally, cycling stability results indicate that the 1D nanobelt-like Co<sub>2</sub>P<sub>2</sub>O<sub>7</sub> material is a better option for the electrochemical energy storage application.