Polaron conduction in Lix[Ni1/3Mn1/3Co1/3]O2-δ (x = 1, 0.9 and δ = 0, 0.05) cathodes

Kabi, S. ; Ghosh, A. (2010) Polaron conduction in Lix[Ni1/3Mn1/3Co1/3]O2-δ (x = 1, 0.9 and δ = 0, 0.05) cathodes Journal of Applied Physics, 107 (10). 103715_1-103715_5. ISSN 0021-8979

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Official URL: http://jap.aip.org/resource/1/japiau/v107/i10/p103...

Related URL: http://dx.doi.org/10.1063/1.3428371


The dc conductivity measured in a wide range of temperature (93-373 K) for the electrode compounds Lix[Ni1/3Mn1/3Co1/3]O2-δ (x = 1, 0.9 and δ = 0, 0.05) is reported in this paper. The dc conductivity data have been analyzed in the framework of theoretical models for polaronic conduction. The analysis shows that in the low temperature range (93-163 K) the dc conductivity data are consistent with the variable range hopping model and from the fits of experimental data the density of localized states at Fermi level for different compositions have been estimated. We have explained the temperature dependence of the conductivity employing polaron hopping models, proposed by Schnakenberg and Emin and co-workers, which consider the coupling of polarons with optical and acoustic phonon modes. The value of estimated polaron bandwidth indicates that polaron hopping process is nonadiabatic in nature. The parameters obtained from the fits of this model are reasonable.

Item Type:Article
Source:Copyright of this article belongs to American Institute of Physics.
ID Code:11719
Deposited On:13 Nov 2010 14:00
Last Modified:02 Jun 2011 05:02

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