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Spherical and nanostructured Li 4 Ti 5 O 12  powders were successfully prepared through spray-drying method. Li 4 Ti 5 O 12  began to be formed after calcining the spray-dried amorphous precursor at approximately 350 °C, and a single phase was obtained at 750 °C. Spherical and porous Li 4 Ti 5 O 12  particles consisting of polyhedral particles assembled from 21–45 nm grains and 4–24 nm pores. An about 1 nm-thick amorphous layer can also be observed on the surface of the nano-sized grains. The Li 4 Ti 5 O 12  prepared at 750 °C exhibits the initial discharge capacities of 218 and 211 mAh g −1  and a high retention of 99.90 % and 99.67 % for 50 times at a rate of 1  C  or 2  C  in the voltage range of 1.0–2.5 V, respectively.

Spray-drying synthesis and characterization of Li 4 Ti 5 O 12 anode material for lithium ion batteries