Sodium Ion Mobility in NaxCoO2 (0.6 < x < 0.75) Cobaltites Studied by 23Na MAS NMR
- 6 May 2009
- journal article
- research article
- Published by American Chemical Society (ACS) in Inorganic Chemistry
- Vol. 48 (15), 7018-7025
- https://doi.org/10.1021/ic900026c
Abstract
Various P2 and P′3-NaxCoO2 phases, with x ranging approximately from 0.6 to 0.75, have been studied by variable-temperature 23Na magic angle spinning (MAS) NMR. Signal modification versus temperature plots clearly show that Na+ ions are not totally mobile at room temperature on the NMR time scale. As the temperature increases, the line shape change of the 23Na MAS NMR signal differs for the P2 and P′3 stackings and is interpreted by the differences of Na+ ion sites and of sodium diffusion pathways in the two structures.Keywords
This publication has 46 references indexed in Scilit:
- Na atomic order, Co charge disproportionation and magnetism in Na x CoO 2 for large Na contentsEurophysics Letters, 2008
- Charge and Spin Order on the Triangular Lattice:atPhysical Review Letters, 2007
- Patterning of sodium ions and the control of electrons in sodium cobaltateNature, 2007
- Crystal structure and elementary properties of (, 0.51, 0.6, 0.75, and 0.92) in the three-layer familyPhysical Review B, 2006
- First Experimental Evidence of Potassium Ordering in Layered K4Co7O14Inorganic Chemistry, 2005
- Sodium ion ordering in: Electron diffraction studyPhysical Review B, 2004
- 59Co, 23Na NMR and electric field gradient calculations in the layered cobalt oxides NaCoO2 and HCoO2Solid State Nuclear Magnetic Resonance, 2003
- Modelling one‐ and two‐dimensional solid‐state NMR spectraMagnetic Resonance in Chemistry, 2001
- Characterization of Extra-Framework Cation Positions in Zeolites NaX and NaY with Very Fast 23Na MAS and Multiple Quantum MAS NMR SpectroscopyJournal of the American Chemical Society, 2000
- Electronic and electrochemical properties of NaxCoO2−y cathodeSolid State Ionics, 1983