Solid-state thin-film batteries consisting of an amorphous Li 2O-V2O5-SiO2 solid electrolyte (LVSO), crystalline LiCoO2 cathode and amorphous SnO anode were fabricated and characterized. All the thin-films were prepared by pulsed laser deposition technique. The amorphous LVSO thin-film has a smooth and dense surface without any pinhole, whose composition was analyzed to be Li 2.2V0.54Si0.46O3.4. The ionic conductivity of the LVSO film is estimated by impedance spectroscopy to be 2.5×10-7 Scm-1 at 25°C with activation energy of 0.54 eV. The thin-film battery can be handled in open atmosphere before charging. The battery exhibits an open circuit voltage at full charge of about 2.7 V, and a good reversibility on charge-discharge cycling over 100 cycles between 0 and 3.3 V.
- Lithium cobalt oxide
- Lithium vanadium silicon oxide
- Thin-film battery
- Tin oxide