Abstract
Thin-film lithium-ion battery of LiMn 2O 4Li 1.3Al 0.3Ti 1.7(PO 4) 3/LiMn 2O 4 was fabricated using Li 1.3Al 0.3Ti 1.7(PO 4) 3 sintered pellet as both substrate and electrolyte. Li 1.3Al 0.3Ti 1.7(PO 4) 3 sintered pellet was prepared by sol-gel technique, and the thin-film battery was heat-treated by rapid thermal annealing. Phase identification, morphology and electrochemical properties of the components and thin-film battery were investigated by X-ray diffractometry, scanning electron microscopy, electrochemical impedance spectroscopy and galvanostatic charge-discharge experiments. The results show that Li 1.3Al 0.3Ti 1.7(PO 4) 3 possesses a electrochemical window of 2.4 V and an ionic conductivity of 1.2 ×10 −4 S/cm. With Li 1.3Al 0.3Ti 1.7(PO 4) 3 sintered pellet as both substrate and solid electrolyte, the fabricated thin-film battery with an open circuit voltage of 1.2V can be easily cycled.
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