Abstract
LiMn2O4 and Li4Ti5O12 films were deposited on the lithium-ion conductor of Li1.3Al0.3Ti1.7(PO4)3 sintered pellet by spray technique. The effect of annealing temperature, annealing time, Li:Ti and Li:Mn molar ratio on the phase and crystallization of the films were investigated with X-ray diffraction. The LiMn2O4/Li1.3Al0.3Ti1.7(PO4)3/Li4Ti5O12 thin-film lithium-ion battery using Li1.3Al0.3Ti1.7(PO4)3 sintered pellet as both electrolyte and substrate was also studied. The results show that the effect of annealing temperature, annealing time, Li:Ti and Li:Mn molar ratio has great effect on the phase and crystallization of Li4Ti5O12 and LiMn2O4 films deposited on the Li1.3Al0.3Ti1.7(PO4)3 sintered pellet. The optimal Li:Ti and Li:Mn molar ratio for the deposition of Li4Ti5O12 and LiMn2O4 films on Li1.3Al0.3Ti1.7(PO4)3 sintered pellet are 7.2:5 and 1.05:2, respectively. The optimal annealing temperature and time for the deposition of LiMn2O4 film on Li1.3Al0.3Ti1.7(PO4)3 sintered pellet are 650°C and 10min. While those for Li4Ti5O12 film are 700°C and 10min. The LiMn2O4/Li1.3Al0.3Ti1.7(PO4)3/Li4Ti5O12 thin-film battery offers a working voltage about 2.25V and can be easily cycled.
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