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

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

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)


Electrolytes highly enriched with oxygen for lithium-oxygen (Li-O2) 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-O2 battery electrolyte, which was ascribed to the high oxygen solubility of the electrolyte. A Li-O2 cell fabricated with the PFC-based electrolyte exhibited an excellent discharging capacity of 6500 mA h g-1 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
Issue number20
Publication statusPublished - 2015 May 28

ASJC Scopus subject areas

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


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