ON 'REALLY' STOICHIOMETRIC LiCoO2

ON 'REALLY' STOICHIOMETRIC LiCoO2

The 7Li NMR T1 spin-lattice relaxation time was to be a very stringent criterion for determining stoichiometry of LiCoO2. When Co3O4 containing a impurity level of paramagnetic ions such as Fe or was used as the starting material (together with a T1 value as long as 18 s was obtained, but this a rat...

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Veröffentlicht in:Electrochemical and solid-state letters 2008-01, Vol.11 (11), p.A179-A182
Hauptverfasser: Menetrier, M, Carlier, D, Blangero, M, Delmas, C
Format: Artikel
Sprache:eng
Schlagworte:
Chemical Sciences
Material chemistry
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Zusammenfassung:The 7Li NMR T1 spin-lattice relaxation time was to be a very stringent criterion for determining stoichiometry of LiCoO2. When Co3O4 containing a impurity level of paramagnetic ions such as Fe or was used as the starting material (together with a T1 value as long as 18 s was obtained, but this a rather long thermal treatment for complete of excess Li. Such highly stoichiometric Li1CoO2 a very early insulator to metal transition upon deintercalation. Magnetic susceptibility and heat capacity investigations showed the exclusive of diamagnetic low-spin Co3+.
ISSN:1099-0062
DOI:10.1149/1.2968953