Electrochemical Na-intercalation-induced high-temperature superconductivity in FeSe

Tetsuya Kajita, Takayuki Kawamata, Takashi Noji, Takehiro Hatakeda, Masatsune Kato, Yoji Koike, Takashi Itoh

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)


Iron-chalcogenide-based superconductors have attracted much attention due to their relatively high superconducting transition temperatures (Tc) and their simple layered crystal structures. We have performed electrochemical co-intercalation of Na and propylene carbonate (PC) into FeSe, and successfully synthesized a new superconductor, Nax(PC)yFe2Se2, with Tc = 43 K. The type and amount of intercalated metal, and the electrolyte used in the intercalation affected the superconductivity. Our electrochemical intercalation method should be a useful tool for discovering new superconductors by controlling the intercalation conditions.

Original languageEnglish
Pages (from-to)104-107
Number of pages4
JournalPhysica C: Superconductivity and its applications
Publication statusPublished - 2015 Dec 15


  • Electrochemical sodium intercalation
  • FeSe
  • Superconductivity

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


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