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Lithium diffusion in a new cathode material Li0.8[Ni0.6Sb0.4]O2 studied by 7Li NMR.

Title: Lithium diffusion in a new cathode material Li0.8[Ni0.6Sb0.4]O2 studied by 7Li NMR.
Authors: Salikhov, T.1 tmsalikhov@gmail.com, Klysheva, E.1, Zvereva, E.2, Nalbandyan, V.3, Shukaev, I.3, Medvedev, B.3, Vavilova, E.1
Source: Magnetic Resonance in Solids. 2016, Vol. 18 Issue 2, p1-8. 8p.
Subject Terms: *LITHIUM niobate, *DIFFUSION, *NUCLEAR magnetic resonance, *SPIN-lattice relaxation, *LITHIUM ions
Abstract: A rhombohedral layered α-NaFeO2-type compound, Lix[Ni(1+x)/3Sb(2-x)/3]O2 (x = 0.8) has been prepared from the sodium analogue by ion exchange at 570 K. In contrast to the stoichiometric composition Li3Ni2SbO6, it shows considerable Li/Ni inversion and no long-range Ni/Sb ordering. The temperature dependence of the 7Li NMR spin-lattice relaxation rate and linewidth data measured at temperature range from 30-450 K show the sharp increase of lithium ions mobility comparing to the stoichiometric compound Li3Ni2SbO6. From the NMR data the activation energy was estimated by different methods. [ABSTRACT FROM AUTHOR]
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