Synthesis and Characteristics of Pyrrolidinium-Based Organic Ionic Plastic Crystals with Various Sulfonylamide Anions

Masahiro Yoshizawa-Fujita*, Hiromasa Yamada, Shun Yamaguchi, Haijin Zhu, Maria Forsyth, Yuko Takeoka, Masahiro Rikukawa

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

Organic ionic plastic crystals (OIPCs) have been studied as solid-state electrolytes owing to their desirable properties such as plasticity, non-flammability, and high ionic conductivity. However, the relationship between the ion structures and the properties of OIPCs are poorly understood. To supplement our previous work on the effects of the side chain structure of pyrrolidinium salts on their properties, this study examined the effects of the anion structure. For this purpose, five N,N-diethylpyrrolidinium ([C2epyr]) salts with various sulfonylamide anions were synthesized. The [C2epyr] salts with bis(fluorosulfonyl)amide ([FSA]) and bis(pentafluoroethanesulfonyl)amide ([BETA]) exhibited higher ionic conductivity values at room temperature than the other [C2epyr] salts. The 1H and 19F solid-state NMR results indicated that the component ions in [C2epyr][FSA] and [C2epyr][BETA] exhibited high rotational mobility, even in the solid state. Thus, rotational mobility is likely important for achieving high ionic conductivity.

Original languageEnglish
Pages (from-to)884-891
Number of pages8
JournalBatteries and Supercaps
Volume3
Issue number9
DOIs
StatePublished - 1 Sep 2020
Externally publishedYes

Keywords

  • NMR spectroscopy
  • mesophases
  • organic ionic plastic crystals
  • solid-state electrolytes
  • sulfonylamide anions

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