Spontaneous solid-liquid mixing at low temperature: A new strategy for synthesis of Li_4Ti_5O_(12) with superior high-power performance

摘要

The nanosized-Li_4Ti_5O_(12) with excellent high-rate performance and cyclic stability is synthesized using a spontaneous solid-liquid mixing process by introducing low-temperature eutectic mixture of LiOH • H_2O and LiNO_3. The intimate solid-liquid mixing and the adhesion or infiltration of the following produced Li_2O to the surfaces of TiO_2 have highly shortened the solid-solid diffusion paths and significantly decreased the high temperature sintering time to 1 h. Results show that the as-prepared Li_4Ti_5O_(12) particles delivers an excellent capacity of 127.0 mA h g~(-1) at 10 C rate with 95.1% capacity retention ratios after 800 cycles.