Synthesis and characterization of co-precipitated nickel phosphate [Ni3(PO4)2] nanoparticles prepared at varying precursor concentrations

This work investigated the structural, morphological, elemental, optical, and electrochemical characteristics of nickel phosphate nanoparticles co-precipitated at varying molar concentrations. Structural results gave monoclinic crystalline phase with nanorod morphology. EDX plots confirmed deposition of constituent element: nickel, phosphorus and oxygen. The films exhibited good absorbance feature with optical energy band gap values ranging from 1.58 eV to 2.2 eV. Good cyclic reversibility as obtained using 0.1 M of sodium hydroxide as electrolyte. The specific capacitance values of the electrodes ranged from 624.38 F/g to 1017.2 F/g at a scan rate of 1 mV/s. The Ni3(PO4)2 electrode prepared at 0.3 M recorded maximum energy and power densities of 239.49 Wh/kg and 2.52 W/kg respectively. The synthesized samples find potential application in optical and electrochemical devices.

Automated summary

This study investigated the characteristics of nickel phosphate nanoparticles co-precipitated at varying molar concentrations in terms of structure, morphology, elements, optics, and electrochemistry. The results showed a monoclinic crystalline phase and nanorod morphology. EDX confirmed the presence of nickel, phosphorus, and oxygen. The films exhibited good absorbance and had optical energy band gap values ranging from 1.58 eV to 2.2 eV. They also showed good cyclic reversibility as electrolytes. The specific capacitance values of the electrodes ranged from 624.38 F/g to 1017.2 F/g at a scan rate of 1 mV/s. The Ni3(PO4)2 electrode prepared at 0.3 M showed the highest energy and power densities of 239.49 Wh/kg and 2.52 W/kg, respectively. These synthesized samples have potential applications in optical and electrochemical devices.