Dielectric and modulus studies of LiNiPO4

Olivine-structured LiNiPO4 has been prepared by a Pechini-type polymerizable precursor method. The structure and the morphology of the compounds are studied by the Rietveld refined X-ray diffraction (XRD), scanning electron microscopy (SEM) and Raman Spectroscopy techniques, respectively. Brunauer, Emmett and Teller surface area (BET) of the compound also studied. LiNiPO4 has orthorhombic structure whose dielectric and modulus properties are studied over the frequency range of 1 MHz to 10 Hz at different temperatures (150-300 degrees C) using impedance spectroscopy. The frequency and temperature dependence of dielectric permittivity, dielectric loss and electric modulus of LiNiPO4 are studied. The frequency dependent plot of modulus show that the conductivity relaxation is of non-Debye type. (C) 2012 Elsevier B.V. All rights reserved.