Preparation and electrochemical performances of Li_4Ti_5O_(12) as anode materia!

摘要

Spinel Li_4Ti_5O_(12) was prepared by a solution method. The structure and morphology of the samples were characterized by X-ray diffraction, scanning electron microscopy. The electrochemical performance was investigated by initial charge-discharge at different rate. The results revealed that the crystallinity of Li_4Ti_5O_(12) was well, the Li_4Ti_5O_(12) prepared by solution method had a relatively smaller particle size and homogeneous morphology. It delivered a discharge capacity 178.59 mAh-g~(-1) for the Li_4Ti_5O_(12) at the 0.2C discharge to IV. The reversible capacity 141.98mAh-g~(-1) could be achieved at the 5C . Li_4Ti_5O_(12) prepared by a solution method showed good rate performance.