Mg(OH)2/rGO nanocomposites for high performance electrodes

Abstract Mg(OH)2 nanoparticles and Mg(OH)2–rGO nanocomposites were prepared by microwave assisted co-precipitation method. The morphological study of the as-prepared samples was done by Transmission electron microscopy (TEM). The real and imaginary parts of complex impedance were studied as a function of frequency over a range of 50Hz to 5MHz at room temperature. The Nyquist plots were recorded to know the resistance contribution from grains and grain boundaries. DC conductivity σdc has been studied as a function of temperature by using two probe method. A minor increase in GO concentration causes increases in the value of σdc in the nanocomposites. The activation energy (Ea) was calculated by using Arrhenius equation and its value decreases with the increases in the GO concentration.