Preparation of Lithium Titanate Electrode Materials by Solid Phase Method
ZHUANG Xiaodong1, LI Rongxing1, YU Xiaohua1, XIE Gang1,2, HE Xiaocai3, XU Qingxin3
1 Metallurgy and Energy Engineering College, Kunming University of Science and Technology, Kunming 650093 2 Kunming Metallurgy Research Institute, Kunming 650031 3 Yunnan Metallurgical Group Chuang Neng Metal Fuel Cell Limited by Share Ltd, Kunming 650500
Abstract: he solid phase method is the main method for the industrial preparation of lithium titanate electrode materials. The spinel lithium titanate (Li4Ti5O12) was synthesized by ball milling assisted solid phase method with anatase TiO2 and Li2CO3 as raw material and anhydrous ethanol as dispersant. The effects of material ratio, sintering temperature and sintering time on the crystal structure, particle morphology and charge-discharge properties were investigated. The results show that when the milling time is 3 h, the ratio of Li to Ti is 0.85, the calcination temperature is 800 ℃, and the sintering time is 12 h, the purity of lithium titanate is high and the morphology is good. The first charge-discharge capacity of the obtained lithium titanate material is 145.50 mAh/g at 1C ratio, and the capacity retention rate is 96.03% after 100 cycles, showing excellent charge-discharge performance.It has certain guiding significance for the preparation of lithium titanate electrode material.
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2019, Vol. 33 
