Thin-film lithium-ion battery with amorphous solid electrolyte fabricated by pulsed laser deposition
2004; Elsevier BV; Volume: 6; Issue: 4 Linguagem: Inglês
10.1016/j.elecom.2004.02.010
ISSN1873-1902
AutoresNaoaki Kuwata, Junichi Kawamura, Keisuke Toribami, Takeshi Hattori, Noriko Sata,
Tópico(s)Transition Metal Oxide Nanomaterials
ResumoSolid-state thin-film batteries consisting of an amorphous Li2O–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 Li2.2V0.54Si0.46O3.4. The ionic conductivity of the LVSO film is estimated by impedance spectroscopy to be 2.5 × 10−7 S cm−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.
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