Preparation of spherical Li4Ti5O12 anode materials by spray drying

Abstract Spherical Li 4 Ti 5 O 12 (LTO) anode materials were synthesized by spray drying, followed by calcination at different temperatures. A well-crystallized LTO in a single phase was obtained at 750 °C. The spherical LTO particles had polyhedron-shaped grains with dimensions of 200×200×200 nm 3 assembled from ~29 nm nanosized grains. The obtained sample at 750 °C had initial discharge capacities of 209.69 and 193.16 mA h g −1 at 1 C and 2 C rates, respectively. After 20 cycles, the as-prepared LTO retained 99.68% and 99.72% of its initial discharge capacities at 1 C and 2 C rates, respectively.