JCPT  Vol.2 No.4 , October 2012
Rietveld Refinement of Nanocrystalline LiFeO2 Synthesized by Sol-Gel Method and Its Structural and Magnetic Properties
Nanocrystalline lithium iron oxide LiFeO2 was synthesized using sol-gel method. Rietveld analysis was performed to confirm the different phases associated in the formation of LiFeO2. Quantitative Rietveld refinement revealed that sample contains: 39.9 wt% of cubic α – LiFeO2 phase, 58.5 wt% of monoclinic β - LiFeO2 and tetragonal 1.7 wt%. of γ - LiFeO2. The nanocrystalline nature of the prepared samples was confirmed by SEM analysis. The magnetic properties of LiFeO2 showed ferromagnetic property at room temperature.

Cite this paper
K. Kumar, A. Sangeetha, A. Raghavender, Z. Skoko and G. Kumar, "Rietveld Refinement of Nanocrystalline LiFeO2 Synthesized by Sol-Gel Method and Its Structural and Magnetic Properties," Journal of Crystallization Process and Technology, Vol. 2 No. 4, 2012, pp. 152-155. doi: 10.4236/jcpt.2012.24022.
[1]   A. R. Armstrong, D. W. Tee, F. La Mantia, P. Novak and P. G. Bruce, “Synthesis of Tetrahedral LiFeO2 and Its Behavior as a Cathode in Rechargeable Lithium Batteries,” Journal of the American Chemical Society, Vol. 130, 2008, pp. 3554-3559. doi:10.1021/ja077651g

[2]   M. S. Whittingham, “Lithium Batteries and Cathode Materials,” Chemical Reviews, Vol. 104, No. 10, 2004, pp. 4271-4302. doi:10.1021/cr020731c

[3]   A. S. Arico, P. G. Bruce, B. Scrosati, J. M. Tarascon and W. Van Schalkwijk, “Nanostructured Materials for Advanced Energy Conversion and Storage Devices,” Nature Materials, Vol. 4, No. 5, 2005, pp. 366-377. doi:10.1038/nmat1368

[4]   J. Kim and A. Manthiram, “Synthesis and Lithium Intercalation Properties of Nanocrystalline Lithium Iron Oxides,” Journal of the Electrochemical Society, Vol. 146, No. 12, 1999, pp. 4371-4374. doi:10.1149/1.1392645

[5]   J. C. Anderson and M. Schieber, “Order-Disorder Transitions in Heat-Treated Rock-Salt Lithium Ferrite,” Journal of Physics and Chemistry of Solids, Vol. 25, No. 9, 1964, pp. 961-968. doi:10.1016/0022-3697(64)90033-2

[6]   L. Liu, et al., “Alternating Current Susceptibility Study on the Cluster Glass Behavior in Disordered β-LiFeO2,” Journal of Applied Physics, Vol. 110, 2011, Article ID: 093912.

[7]   S. Kohiki, et al., “Magnetic Cluster Behavior of α-LiFeO2 Related to the Cation Arrangements,” Japanese Journal of Applied Physics, Vol. 43, 2004, pp. L1232-L1235. doi:10.1143/JJAP.43.L1232

[8]   M. Tabuchi, et al., “Effect of Cation Arrangement on the Magnetic Properties of Lithium Ferrites (LiFeO2) Prepared by Hydrothermal Reaction and Post-annealing Method,” Journal of Solid State Chemistry, Vol. 140, No. 2, 1998, p. 159. doi:10.1006/jssc.1998.7725

[9]   M. Barre and M. Catti, “Neutron Diffraction Study of the β′ and γ Phases of LiFeO2,” Journal of Solid State Chemistry, Vol. 182, No. 9, 2009, pp. 2549-2554. doi:10.1016/j.jssc.2009.06.029

[10]   F. Du, et al., “Unusual Magnetism Due to a Random Distribution of Cations in α-LiFeO2,” Journal of the Physical Society of Japan, Vol. 80, 2011, Article: 094705. doi:10.1143/JPSJ.80.094705

[11]   Y. S. Lee, S. Sato, Y. K. Sun, K. Kobayakawa and Y. Sato, “A New Type of Orthorhombic LiFeO2 with Advanced Battery Performance and Its Structural Change During Cycling,” Journal of Power Sources, Vol. 119121, 2003, pp. 285-289.

[12]   M. Hirayama, H. Tomita, K. Kubota, H. Ido and R. Kanno, “Synthesis and Electrochemical Properties of Nanosized LiFeO2 Particles with a Layered Rocksalt Structure for Lithium Batteries,” Materials Research Bulletin, Vol. 47, No. 1, 2012, pp. 79-84. doi:10.1016/j.materresbull.2011.09.024

[13]   A. T. Raghavender, et al., “Synthesis and Magnetic Properties of NiFe2?xAlxO4 Nanoparticles,” Journal of Magnetism and Magnetic Materials, Vol. 316, No. 1, 2007, pp. 1-7. doi:10.1016/j.jmmm.2007.03.204

[14]   M. Tabuchi, K. Ado, H. Kobayashi, I. Matsubara and H. Kageyama, “Magnetic Properties of Metastable Lithium Iron Oxides Obtained by Solvothermal/Hydrothermal Reaction,” Journal of Solid State Chemistry, Vol. 141, No. 2, 1998, pp. 554-561. doi:10.1006/jssc.1998.8018

[15]   M. Tabuchi, et al., “Li+Na+ Exchange from α-NaFeO2 Using Hydrothermal Reaction”, Solid State Ionics, Vol. 90, No. 1, 1996, pp. 129-132. doi:10.1016/S0167-2738(96)00414-6

[16]   D. E. Cox, G. Shirane, P. A. Flinn, S. L. Ruby and W. J. Takei, “Neutron Diffraction and M?ssbauer Study of Ordered and Disordered LiFeO2,” Physical Review, Vol. 132, No. 4, 1963, pp. 1547-1553. doi:10.1103/PhysRev.132.1547