Abstract
Lithium titanate spinel (Li4Ti5O12) has been successfully prepared via a simple hydrothermal treatment of layered sodium titanate Na2Ti3O7 nanostructures in LiOH aqueous solution. The pure phase of α-Li2TiO3 intermediate product is formed due to ion exchange Na+→ Li+ accompanied by chemical interaction of components under hydrothermal conditions. The intermediate product is formed by one-dimensional elongated nanostructures and nanostructured particles up to 250 nm in size. Annealing at 550 °C leads to their conversion to a nanostructured Li4Ti5O12 spinel. The combination effect of one-dimensional elongated structures and non-compact architectures allows one to obtain a nanostructured material with a decreased grain boundary resistance compared to pure LTO.
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