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Synthesis and Characteristics of Pyrrolidinium‐Based Organic Ionic Plastic Crystals with Various Sulfonylamide Anions
Author(s) -
YoshizawaFujita Masahiro,
Yamada Hiromasa,
Yamaguchi Shun,
Zhu Haijin,
Forsyth Maria,
Takeoka Yuko,
Rikukawa Masahiro
Publication year - 2020
Publication title -
batteries and supercaps
Language(s) - English
Resource type - Journals
ISSN - 2566-6223
DOI - 10.1002/batt.202000040
Subject(s) - plastic crystal , ionic conductivity , ionic bonding , amide , chemistry , ion , conductivity , inorganic chemistry , electrolyte , fast ion conductor , solid state , side chain , materials science , organic chemistry , polymer , phase (matter) , electrode
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 ([C 2 epyr]) salts with various sulfonylamide anions were synthesized. The [C 2 epyr] salts with bis(fluorosulfonyl)amide ([FSA]) and bis(pentafluoroethanesulfonyl)amide ([BETA]) exhibited higher ionic conductivity values at room temperature than the other [C 2 epyr] salts. The 1 H and 19 F solid‐state NMR results indicated that the component ions in [C 2 epyr][FSA] and [C 2 epyr][BETA] exhibited high rotational mobility, even in the solid state. Thus, rotational mobility is likely important for achieving high ionic conductivity.