Abstract
In This paper, butyl titanate and LiOH·H2O was used as titanium source and lithium source respectively. Li4Ti5O12 as battery negative material was prepared by sol-gel method. The effects of chelating agent (triethanolamine), raw material ratio, calcination temperature and calcination time on Li4Ti5O12 products were studied by single factor method. The experimental results show that The optimum synthetic conditions are as follows: the spinel Li4Ti5O12 with pure phase, uniform grain size, 100–200 nm particle size and no obvious agglomeration can be prepared under the conditions of molar ratio of lithium to titanium is 0.9–1.0, the calcination temperature can be 730–750 °C at 8 h. After assembled into CR2016 button cell, the first charge-discharge capacity of CR2016 button cell can reach 169 mAh/g at 0.1 C rate, which is very close to the theoretical value of 175 mAh/g.
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