Journal of Solid State Electrochemistry

, Volume 16, Issue 5, pp 1743–1751 | Cite as

Enabling the Li-ion conductivity of Li-metal fluorosulphates by ionic liquid grafting

  • Prabeer BarpandaEmail author
  • Rémi Dedryvère
  • Michael Deschamps
  • Charles Delacourt
  • Marine Reynaud
  • Atsuo Yamada
  • Jean-Marie Tarascon
Original Paper


Recently unveiled ‘alkali metal fluorosulphate (AMSO4F)’ class of compounds offers promising electrochemical and transport properties. Registering conductivity value as high as 10−7 S cm−1 in NaMSO4F phases, we explored the fluorosulphate group to design novel compounds with high Li-ion conductivity suitable for solid electrolyte applications. In the process, we produced sillimanite-structured LiZnSO4F by low temperature synthesis (T ≤ 300 °C). Examining this phase, we accidentally discovered the possibility of improving the ionic conductivity of poor conductors by forming a monolayer of ionic liquid at their particle surface. This phenomenon was studied by solid-state NMR, XPS and AC impedance spectroscopy techniques. Further, similar trends were noticed in other fluorosulphate materials like tavorite LiCoSO4F and triplite LiMnSO4F. With this study, we propose ‘ionic liquid grafting’ as an interfacial route to enable good Li-ion conductivity in otherwise poor conducting ceramics.


Conductivity Fluorosulphates Ionic liquid grafting Solid electrolyte 



The scientific assistance of Dominique Massiot (Orleans) and Danielle Gonbeau (Pau) is acknowledged. We thank ALISTORE-ERI for the financial support. The first author (PB) is grateful to the Japan Society for the Promotion of Science for a JSPS Fellowship at the University of Tokyo.


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Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  • Prabeer Barpanda
    • 1
    • 2
    Email author
  • Rémi Dedryvère
    • 3
  • Michael Deschamps
    • 4
  • Charles Delacourt
    • 1
  • Marine Reynaud
    • 1
  • Atsuo Yamada
    • 2
  • Jean-Marie Tarascon
    • 1
    • 5
  1. 1.Laboratoire de Réactivité et Chimie des Solides, CNRS UMR 6007Université de Picardie Jules VerneAmiens CedexFrance
  2. 2.Department of Chemical System EngineeringThe University of TokyoTokyoJapan
  3. 3.IPREM-ECP, University of PauPauFrance
  4. 4.Cenre de Recherches sur les Materiaux a Hautes Temperatures, CNRS UPR 3079Orléans CedexFrance
  5. 5.Collège de FranceParisFrance

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