Effect of TiO2 on the reduction of lithium titanate induced by H2 in the sweep gas

Lithium titanate (Li2TiO3) has attracted the attention of many researchers because of good tritium recovery at low temperature, chemical stability, low tritium inventory, etc. In this work, the effects of TiO2 doping of Li2TiO3 on the resistance to the environmental attack in air and hydrogen reduction under Ar+0.1%H2 flow were examined. Based on the results, the TiO2 doping (from 3.7 to 30 wt%) was found to improve the resistance to the environmental attack for very long exposure times in air at room temperature. The hydrogen reaction rates of Li2TiO3 and Li4Ti5O12 were almost similar up to 800 °C and that of Li4Ti5O12 was higher in the temperature range from 800 to 950 °C.