Synthesis and electrochemical investigations of nanostructured LiNiPO4 as promising electrode for supercapattery applications

Abstract

The electrode materials are essential to fabricate energy storage systems. Here, the electrode materials of LiNiPO4 Nanoparticles (NPs) were prepared using simple hydrothermal process and its structural, morphology, functional and elemental properties were confirmed with special analytical tools like, powder X-ray diffraction (PXRD), Scanning electron microscope (SEM), Furrier transform infrared spectroscopy (FTIR) and energy dispersive X- ray diffraction (EDX) with mapping correspondingly. Ensuing the redox peaks and electrochemical interaction, charge/discharge cycles and conductivity of electrode materials were examined through the cyclic voltammetry (CV), Galvanostatic charge discharge (GCD) and electrochemical impedance spectroscopy (EIS) studies. The prepared LiNiPO4 electrodes exhibit a superior specific capacity of 651.70 C/g at 5 mV/s. The cyclic stability of electrode attained 87 % specific-capacity retention complete 10,000 cycles with 5 A/g.

Keywords

• Hydrothermal
• Supercapattery
• Olivine structure
• Lithium nickel phosphate
• Charge storage mechanism