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HomeSolid State PhenomenaSolid State Phenomena Vol. 280Comparison of Structural and Electrical Behaviour...

Comparison of Structural and Electrical Behaviour of Phospho-Olivine LiNiPO₄ and LiNi_0.8Mn_0.1Co_0.1PO₄ for High Voltage Rechargeable Li-Ion Batteries

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Abstract:

Phase pure olivine LiNiPO₄and doped LiNi_0.8Mn_0.1Co_0.1PO₄ powders have been prepared by conventional solid state route. X-ray diffraction (XRD) combined with Rietveld refinements analysis reveals the formation of LiNiPO₄and doped LiNi_0.8Mn_0.1Co_0.1PO₄ with high crystalline nature at high temperature of 950 °C and 1000 °C. The lattice parameters of doped LiNi_0.8Mn_0.1Co_0.1PO₄ are significantly larger than LiNiPO₄. It has been found out that the estimated crystallite size is in the order of nanometres for both samples. SEM analysis confirms that the particles have connected with each other in random shape and sub-microns size. The particle size has increased as small amount of Mn and Co are doped into LiNiPO₄. The AC impedance spectroscopy measurements have revealed that the conductivity of LiNiPO₄ is enhanced by around one order of magnitude by doping Mn and Co.

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Solid State Phenomena (Volume 280)

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50-57

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https://doi.org/10.4028/www.scientific.net/SSP.280.50

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Online since:

August 2018

Authors:

T.Q. Tan*, Mohd Sobri Idris, Rozana Aina Maulat Osman, Nor Azura Malini Ahmad Hambali, M.V. Reddy

Keywords:

Cathode Materials, Lithium Ion Batteries, Olivine, Rietveld Refinement

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© 2018 Trans Tech Publications Ltd. All Rights Reserved

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