ChemInform Abstract: NMR and X-Ray Absorption Study of Lithium Intercalation in Micro- and Nanocrystalline Anatase
Autor: | Tracey Hanley, Russell F. Howe, Nicholas K. Roberts, Vittorio Luca |
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Rok vydání: | 2010 |
Předmět: | |
Zdroj: | ChemInform. 30 |
ISSN: | 1522-2667 0931-7597 |
Popis: | The intercalation of Li into micro- and nanocrystalline anatase xerogel powders using n-butyllithium and various preparation conditions has been studied by 6Li and 7Li solid-state NMR and X-ray absorption spectroscopy. The orthorhombic lithium titanate phase which forms for Li/Ti 0.30. These two lithium environments are assigned to Li+ ions in similar structural sites that are uncoupled (species A) and weakly coupled (species B) to conduction band electrons. Nanocrystalline anatase samples produced by sol−gel methods differ from microcrystalline anatase in that the proportion of species A is greater. NMR further suggests that the coordination number of species A cannot be greater than five while no definite conclusions could be reached from NMR concerning species B. Titanium ... |
Databáze: | OpenAIRE |
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