The Effect of Synthesis Temperature on Interlayer Mixing in Layered Rock Salt Cathode Materials LiNi_0.7Mn_0.1Co_0.2O₂ for Li-Ion Batteries Application

Abstract:

The interlayer mixing of layered rock salt cathode materials LiNi_0.7Mn_0.1Co_0.2O₂ that prepared by mixed hydroxide method at various temperatures (750-950°C) has been studied. X-ray Diffraction (XRD) was used to determine a suitable temperature range to obtain the fully reacted sample. Phase of pure sample was obtained at high temperature above 850°C. The results of XRD show that the LiNi_0.7Mn_0.1Co_0.2O₂ samples are iso-structural with α-NaFeO₂ with space group of R-3m.The sample that heated at 900°C exhibits a well-ordered and lower cation mixed layered structure than others. Rietveld refinement using XRD data was used to determine the amount of interlayer mixing vary as a function of temperature. Refinements data showed that the interlayer mixing varies depend upon the synthesis temperature and the optimum temperature to prepare LiNi_0.7Mn_0.1Co_0.2O₂ with the lowest amount of interlayer mixing was 900°C.

• Periodical: Materials Science Forum (Volume 819)
• Pages: 155-160
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.819.155
• Online since: June 2015
• Authors: S.P. Soo, Mohd Sobri Idris, Rozana A.M. Osman, A. Rahmat
• Keywords: Cathode Materials, Interlayer Mixing, Layered Structure, Li-Ion Batteries, LiNi_0.7Mn_0.1Co_0.2O₂

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