DOPED LITHIUM TITANATES AND THEIR COMPOSITES WITH CARBON NANOTUBES AS ANODES FOR LITHIUM-ION BATTERIES

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Abstract

Lithium titanates Li4+xTi5–xMxO12 (M = Sc, Ga, Al, Cr; x= 0, 0.05, 0.1, 0.15) and their composites with carbon nanotubes were synthesized by the sol-gel method and characterized using X-ray diffraction, scanning electron microscopy, impedance and 7Li MAS NMR spectroscopy; their electrochemical testing was carried out. Doping with trivalent cations leads to a decrease in the mobility of lithium ions in Li4+xTi5–xMxO12, which indicates the dominance of lithium transport through vacancies in these materials. The best electrochemical characteristics are demonstrated by the Li4+xTi5–xMxO12 composites with carbon nanotubes.

About the authors

I. A. Stenina

Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences

Email: stenina@igic.ras.ru
Moscow, Russia

T. L. Kulova

Frumkin Institute of Physical Chemistry and Electrochemistry of the Russian Academy of Sciences

Moscow, Russia

А. B. Yaroslavtsev

Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences

Moscow, Russia

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