Abstract
Hybrid microwave synthesis has been applied for preparation of Li 4Ti 5O 12, Li 2Ti 3O 7, Li 2TiO 3 and LiTiO 2 for the first time. Stepwise heating was used for avoiding the instantaneous release of gas by-product and obtaining well-shaped samples. The samples were characterized by powder X-ray diffraction, energy-dispersive X-ray analysis and scanning electron microscopy. The obtained samples have relatively uniform particle sizes. The electrochemical performance of Li 4Ti 5O 12 and Li 2Ti 3O 7 were investigated. The first discharge capacity of Li 4Ti 5O 12 was 150 mAh g −1 and 141 mAh g −1 after 27 cycles and a very flat discharge and charge curve of Li 4Ti 5O 12 was shown at about 1.56 V. Similarly, Li 2Ti 3O 7 exhibits good cycle performance. The initial discharge capacity is 118 mAh g −1 and 30th cycle is still 112 mAh g −1.
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