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This paper presents a novel approach to an explanation of apparently different characters of the discharge/charge curve in Li x CoO 2 (monotonous curve in large range of lithium content) and Na x CoO 2−y systems (step-like curve). Comprehensive experimental and theoretical studies on crystallographic, electronic and electrical transport properties of the Li x ...
Comprehensive studies of the electrical and thermal properties of NaxCoO2−y cathode material in the characteristic points of the discharge curve i.e. on the pseudo-plateaus and on the potential jumps, show non-monotonous variations of its transport properties (metallic/semiconducting/metallic/semiconducting/metallic) during sodium intercalation, which indicates that the density of states near the...
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