Electrospinning synthesis of spinel Li4Ti5O12 and its characterization

Abstract

The electrode material Li4Ti5O12 (LTO) with excellent electrochemical properties was synthesized by an electrospinning method using Ti(OCH(CH3)2)4 and CH3COOLi as raw materials. The effects of the solution viscosity and calcination conditions on the structure and electrochemical performance of LTO were investigated by scanning electron microscopy (SEM), X-ray diffractometry (XRD) and charge-discharge test. The optimal synthesis condition is 11 cP for the viscosity of the precursor solution, 800 °C for 12h with the heating rate of 1°C min-1 for the calcination of precursor filaments. The product has a narrow diameter distribution and small amounts of impurities. The discharge capacity of LTO sample is 199.51 mAhg-1.