Synthesis of three layer Na xCoO 2 (x=0.3, 0.5, 0.6, 0.75, 1.0) and superconductivity in three layer Na 0.3CoO 2•1.3H 2O

M. L. Foo, T. Klimczuk, L. Li, N. P. Ong, R. J. Cava, Q. Huang, J. W. Lynn, H. W. Zandbergen

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The synthesis of three layer sodium cobalt oxide, Na xCoO 2 (x=0.3, 0.5, 0.6, 0.75 and 1.0) is reported. For x=0.6, 0.75, and 1.0, conventional solid-state synthesis was employed. x=0.3 and 0.5 were obtained via oxidative deintercalation of sodium at room temperature. x=0.3 can be hydrated to Na 0.3CoO 2•1.3H 2O which is superconducting with a T c of 4.3 K. Although having the same chemical stiochiometry as the previously reported two layer superconductor, it has a different stacking sequence of CoO 2 layers making it structurally distinct. Crystals of three layer NaCoO 2 show triangular morphology compared to hexagonal morphology for two layer Na 0.7CoO 2.

Original languageEnglish (US)
Article numberFF6.11
Pages (from-to)275-280
Number of pages6
JournalMaterials Research Society Symposium Proceedings
StatePublished - 2005
Event2004 Materials Research Society Fall Meeting - Boston, MA, United States
Duration: Nov 29 2004Dec 2 2004

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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