Hybrid Sodium–Air Cell with Na[FSA–C2C1im][FSA] Ionic Liquid Electrolyte

Yao Kang, Feng Liang, Katsuro Hayashi

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)


Na[FSA–C2C1im][FSA] (C2C1im+:1-ethyl-3-methylimidazolium and FSA:bis(fluorosulfony)amide) ionic liquid was utilized as the aprotic electrolyte in hybrid sodium–air cells for the first time. The sodium–air cells were operated at relatively high temperatures up to 70 °C to prove their excellent thermal stability. A large output power density was obtained by increasing the operation temperature because of the high Na+ diffusivity and high ionic conductivity of the ionic liquid. The cells exhibited an extremely large specific capacity of 835 mAh g−1 at 50 °C; this capacity corresponds to 99% of the theoretical capacity. In addition, maximum areal output power density of 27.6 mW cm−2 was obtained at 50 °C. The Na[FSA–C2C1im][FSA] ionic liquid was proved to be a promising aprotic electrolyte to enhance the electrochemical performance of hybrid sodium–air cells.

Original languageEnglish
Pages (from-to)119-124
Number of pages6
JournalElectrochimica Acta
Publication statusPublished - Nov 10 2016

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Electrochemistry

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