Hydrothermal synthesis of spherical Li4Ti5O12 material for a novel durable Li4Ti5O12/LiMn2O4 full lithium ion battery

Pure spherical Li4Ti5O12 spinel material is quickly synthesized via an efficient hydrothermal procedure. The obtained Li4Ti5O12 particle size is about 0.5 µm. The Li4Ti5O12 has an initial discharge capacity of 162.2 mA h g−1 and capacity retention of 97.5% after 100 cycles at a rate of 0.2 C. Then, a 2.5 V and long-lasting Li-ion cell with a LiMn2O4 cathode and a Li4Ti5O12 anode is developed. Electrochemical measurements of the cell indicate that the Li4Ti5O12/LiMn2O4 full cell, with a weight ratio of 1.5 between cathode and anode, exhibits excellent electrochemical performance, delivering a reversible capacity of 130 mA h g−1 at room temperature. The full cell also exhibits outstanding electrochemical performances at high temperature, as it has an initial discharge capacity of 109.6 mA h g−1, along with a capacity retention rate of 88.9% after 100 cycles at 55 °C.