AIP Advances (Mar 2013)

Intrinsic rapid Na+ intercalation observed in NaxCoO2 thin film

  • T. Shibata,
  • W. Kobayashi,
  • Y. Moritomo

DOI
https://doi.org/10.1063/1.4794719
Journal volume & issue
Vol. 3, no. 3
pp. 032104 – 032104

Abstract

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Electrochemical properties are investigated for thin film electrode of NaxCoO2, which was fabricated by pulsed laser deposition. A high rate of 400 C was realized in the film together with a fine cyclability where its capacity after 1000 cycles remains 84.4% of the initial one. The NaxCoO2 thin film exhibits a clear sign of the structural phase transition induced by Na+ intercalation even at the high rate of 200 C. This observation indicates bulk nature of the rapid and highly-reversible Na+ intercalation in NaxCoO2.