Structural, Morphological, Vibrational and Electrical Studies on Zn Doped Nanocrystalline LiNiPO₄

Abstract:

Olivine structured LiNi_1-xZn_xPO₄ (x=0, 0.05, 0.10, 0.15, 0.20) have been prepared by a polyol method using 1, 2 propanediol as a polyol medium. The XRD results of pure and Zn doped LiNiPO₄ sample authenticate the orthorhombic crystal structure with high crystalline nature. The crystallite size is calculated from the Debye Scherer formula and it is found in the range of 55-65nm and 49-55nm for undoped and doped samples respectively. The thermal properties of LiNi_1-xZn_xPO₄ were investigated by thermo gravimetric analysis (TG) and differential thermal analysis. Laser Raman studies confirm that the dopant is entered in to the LiNiPO₄ lattice. Morphology of the samples is analyzed through SEM analysis. The higher electrical conductivity is calculated for LiNi_0.85Zn_0.15PO₄ sample compared with other concentrations of dopant and it is found to be 1.08×10^-7 S cm^-1 at ambient temperature. Dielectric and Modulus studies are also discussed through impedance spectroscopy.

• Periodical: Materials Science Forum (Volume 781)
• Pages: 145-153
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.781.145
• Online since: March 2014
• Authors: S. Karthickprabhu, G. Hirankumar*, A. Maheswaran, R.S. Daries Bella, C. Sanjeeviraja
• Keywords: Dielectric Constant, Electrical Conductivity, Lattice Doping, X-Ray Diffraction (XRD)

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