Abstract
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 language | English (US) |
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Article number | FF6.11 |
Pages (from-to) | 275-280 |
Number of pages | 6 |
Journal | Materials Research Society Symposium Proceedings |
Volume | 848 |
State | Published - 2005 |
Event | 2004 Materials Research Society Fall Meeting - Boston, MA, United States Duration: Nov 29 2004 → Dec 2 2004 |
All Science Journal Classification (ASJC) codes
- General Materials Science
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering