Preparation of Li4Ti5O12 by solution ion-exchange of sodium titanate nanotube and evaluation of electrochemical performance

摘要: Nano-sized spinel lithium titanate (Li4Ti5O12) was synthesized using sodium nanotube as precursor via a facile solution ion-exchange method in association with subsequent calcination treatment at relatively low temperature. The influences of precursors, condition, and temperature on the microstructure electrochemical performance products were studied. Results indicate that pure-phase Li4Ti5O12 can be harvested from through an ion-exchanging room 500 °C. exhibit better Li-ion battery anode material than counterparts prepared protonic (H-titanate) precursor. reason may lie is easier to synthesize without TiO2 impurity, resulting reduced electron transfer ability transport ability. capacity 146 mAh/g 10 C, it has only 0.7 % decay after 200 charge/discharge cycles.