Studies on the Synthesis and Physico-Chemical Properties of Porous LiFe0.9M0.1P2O7 (M = Fe, Co, Mn, Ni) Nanoparticles
The nano-porous LiFe0.9M0.1P2O7 (M=Fe, Co, Mn, Ni) particles were successfully prepared by simple microwave assisted combustion method and studied its detailed physico-chemical properties. The phase purity, crystallinity, functional group identification was revealed through X-ray diffraction (XRD), Fourier Transform Infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) analysis. The presence of nanoporous was identified through transmission electron microscopic (TEM) images. The electrical conductivity results illustrated that LiFe0.9Ni0.1P2O7 has higher conductivity (2.85×10−7 S cm−1) among the studied systems owing to their negligible grain boundary effect. The normal dielectric behaviour was observed for all the LiFe0.9M0.1P2O7 (M = Fe, Co, Mn, Ni) materials. The paramagnetic behaviour and the Fe3+ state of LiFe0.9M0.1P2O7 were obtained from VSM and Mössbauer spectral analysis respectively. The cyclic voltammogram suggested that the good electrochemical lithium intercalation/de-intercalation behaviour of LiFe0.9M0.1P2O7 (M=Fe, Co, Mn, Ni) electrodes in aqueous electrolytes. The obtained diffusion coefficient value is comparable with carbon based materials.
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Document Type: Research Article
Publication date: January 1, 2016
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