Characterization of thin-film lithium batteries with stable thin-film Li3 PO4 solid electrolytes fabricated by arf excimer laser deposition

Naoaki Kuwata, Naoya Iwagami, Yoshinari Tanji, Yasutaka Matsuda, Junichi Kawamura

    Research output: Contribution to journalArticlepeer-review

    98 Citations (Scopus)

    Abstract

    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.

    Original languageEnglish
    Pages (from-to)A521-A527
    JournalJournal of the Electrochemical Society
    Volume157
    Issue number4
    DOIs
    Publication statusPublished - 2010

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Renewable Energy, Sustainability and the Environment
    • Surfaces, Coatings and Films
    • Electrochemistry
    • Materials Chemistry

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