Sonochemical synthesis and characterization of turbostratic MnNi(OH)2 layered double hydroxide nanoparticles for supercapacitor applications

Abstract

In this research, manganese and nickel transition metal layered double hydroxide nanoparticles (MnNi(OH)₂) with a size of ∼100 nm have been successfully prepared using a sonochemical irradiation method for supercapacitor applications. X-ray diffraction (XRD) and Fourier Transform Infrared (FT-IR) analyses clearly indicate the formation of MnNi(OH)₂ nanoparticles. Scanning and Transmission electron microscopic images identify the layered double hydroxide structure formation. MnNi(OH)₂ layered double hydroxide nanoparticles were tested as a supercapacitor material which exhibits specific capacitance of 160 F g⁻¹ at a current density of 1 mA cm⁻² at the potential range from 0.0 to 1.0 V in 1 M Na₂SO₄ solution.