Oxygen-enriched electrolytes based on perfluorochemicals for high-capacity lithium-oxygen batteries

Yuki Nishikami, Toshihiro Konishi, Ryo Omoda, Yuichi Aihara, Kenichi Oyaizu, Hiroyuki Nishide

    Research output: Contribution to journalArticle

    24 Citations (Scopus)

    Abstract

    Electrolytes highly enriched with oxygen for lithium-oxygen (Li-O<inf>2</inf>) batteries were prepared by combining perfluorohexyl bromide as an oxygen-uptake perfluorochemical (PFC) medium with lithium perfluorooctane sulfonate (LiPFOS) as a perfluoro-surfactant and a supporting electrolyte, which allowed an exceptionally high miscibility of PFCs with tetraethylene glycol dimethyl ether (TEGDME). The electrochemical reduction current of oxygen was enhanced three times in the LiPFOS-TEGDME electrolyte with ca. 60 wt% PFC content in comparison with that of a conventional Li-O<inf>2</inf> battery electrolyte, which was ascribed to the high oxygen solubility of the electrolyte. A Li-O<inf>2</inf> cell fabricated with the PFC-based electrolyte exhibited an excellent discharging capacity of 6500 mA h g<sup>-1</sup> which was approximately 1.5 times higher than that obtained with the conventional electrolyte.

    Original languageEnglish
    Pages (from-to)10845-10850
    Number of pages6
    JournalJournal of Materials Chemistry A
    Volume3
    Issue number20
    DOIs
    Publication statusPublished - 2015 May 28

    ASJC Scopus subject areas

    • Chemistry(all)
    • Renewable Energy, Sustainability and the Environment
    • Materials Science(all)

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