High quality Li3PO4 thin films have been prepared by pulsed laser deposition (PLD) as a solid electrolyte for thin-film batteries. The structure, composition, ionic conductivity, and electrochemical stability of the Li3PO4 thin films have been characterized. The Li3PO4 film exhibits a single lithium-ion conductor with an ionic conductivity of 4.0× 10-7 S cm-1 at 25°C and an activation energy of 0.58 eV. The Li3PO4 film is electrochemically stable in the potential range from 0 to 4.7 V vs Li/ Li+. All-solid-state thin-film batteries, Li/ Li3 PO 4/ LiCoO2, have been fabricated by using PLD-grown Li 3PO4 thin film. The thin-film battery shows excellent intercalation property and stability for long-term cycling in the potential range from 3.0 to 4.4 V.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Renewable Energy, Sustainability and the Environment
- Surfaces, Coatings and Films
- Materials Chemistry