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Structural and electrical studies of olivine LiNi1 − x(Co0.5Mn0.5) x PO4 (0 ≤ x ≤ 1) at high temperature

  • T. Q. Tan
  • R. A. M. Osman
  • M. V. Reddy
  • Z. Jamal
  • M. S. Idris
Original Paper
  • 19 Downloads

Abstract

A series of olivine-structured of LiNi1 − x(Co0.5Mn0.5) x PO4 (0 ≤ x ≤ 1) compositions have been synthesized by two-step conventional solid-state method at high temperature of 1000 °C followed by slow cooling or quenching. The XRD patterns of the obtained samples confirmed the formation of LiNi1 − x(Co0.5Mn0.5) x PO4 (0 ≤ x ≤ 1) phase with orthorhombic structure, Pmna space group. The lattice parameters determined by Rietveld refinements increase significantly as Co and Mn substitute for Ni. The SEM images show that the sample x = 0.8 started to partially melt while x = 1 has fully melted at temperature 1000 °C. The AC impedance spectroscopy measurements have revealed that the conductivity measured at 300 °C of all the slow-cooled samples can be enhanced by quenching. The quenched sample with x = 0.8 showed the largest increment of conductivities from 3.70 × 10−8 S cm−1 to 1.05 × 10−6 S cm−1 as a function of the cooling condition.

Keywords

X-ray diffraction (XRD) Rietveld refinement Olivine-structured Electrical conductivity 

Supplementary material

11581_2018_2536_MOESM1_ESM.docx (1 mb)
ESM 1 (DOCX 1.02 kb)

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • T. Q. Tan
    • 1
    • 2
  • R. A. M. Osman
    • 3
  • M. V. Reddy
    • 4
  • Z. Jamal
    • 3
  • M. S. Idris
    • 1
    • 2
  1. 1.Centre for Frontier Materials ResearchUniversiti Malaysia PerlisKangarMalaysia
  2. 2.School of Materials EngineeringUniversiti Malaysia PerlisArauMalaysia
  3. 3.School of Microelectronics EngineeringUniversiti Malaysia PerlisArauMalaysia
  4. 4.Advanced Batteries Lab, Department of PhysicsNational University of SingaporeSingaporeSingapore

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