Rietveld refinements of X-ray data of LiCoO2 prepared at 400-degrees-C and a chemically-delithiated product Li0.5CoO2 using space group symmetries R3mBAR and Fd3m are reported. Refinements in both R3mBAR (layered-type structure) and Fd3m (spinel-type structure) give comparable fits to the data. This structural anomaly is discussed in terms of the refinements and electrochemical data obtained when lithium is extracted from LiCoO2 in non-aqueous cells at room temperature. A spinel-related model for LixCoO2 (0.5 less-than-or-equal-to x less-than-or-equal-to 1) is preferred.
Reference:
Gummow, RJ, Liles, DC and Thackeray, MM. 1993. Spinel versus layered structures for lithium cobalt oxide synthesized at 400-degrees-c. Materials Research Bulletin, vol. 28(3), pp 235-246
Gummow, R., Liles, D., & Thackeray, M. (1993). Spinel versus layered structures for lithium cobalt oxide synthesized at 400-degrees-c. http://hdl.handle.net/10204/2125
Gummow, RJ, DC Liles, and MM Thackeray "Spinel versus layered structures for lithium cobalt oxide synthesized at 400-degrees-c." (1993) http://hdl.handle.net/10204/2125
Gummow R, Liles D, Thackeray M. Spinel versus layered structures for lithium cobalt oxide synthesized at 400-degrees-c. 1993; http://hdl.handle.net/10204/2125.
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