Influence of milling time in solid-state synthesis on structure, morphology and electrochemical properties of Li4Ti5O12 of spinel structure

Monika Michalska, Michał Krajewski, Dominika Ziolkowska, Bartosz Hamankiewicz, Mariusz Andrzejczuk, Ludwika Lipinska, Krzysztof Korona, Andrzej Czerwinski

A high-energy ball-milling process was used for the solid-state synthesis of single phase powders of spinel-structured lithium-titanium oxide (Li₄Ti₅O₁₂). The influence of the high-energy ball-milling time on the structure, morphology, and electrochemical performance of synthesized powders was investigated. Remarkably, the electrochemical tests performed at high rates showed significantly improved specific capacity of the powders obtained with extended synthesis times. In particular, after 50 charging/discharging cycles at the current rate of 1C, the samples retained more than 94% of their initial specific capacity.

Powder Technology 266 (2014) 372-377.

http://www.sciencedirect.com/science/article/pii/S0032591014006007