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Structural Design of Ionic Conduction Paths in Molecular Crystals for Selective and Enhanced Lithium Ion Conduction
Author(s) -
Moriya Makoto,
Kato Daiki,
Sakamoto Wataru,
Yogo Toshinobu
Publication year - 2013
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201300106
Subject(s) - lithium (medication) , ionic conductivity , ion , stacking , ionic bonding , conductivity , crystal structure , chemistry , crystallography , crystal (programming language) , intermolecular force , thermal conduction , electrolyte , materials science , inorganic chemistry , molecule , organic chemistry , electrode , medicine , computer science , programming language , composite material , endocrinology
The molecular crystals [Li{N(SO 2 CF 3 ) 2 }{C 6 H 4 (OCH 3 ) 2 } 2 ] and [Li{N(SO 2 CF 3 ) 2 }{C 6 F 2 H 2 (OCH 3 ) 2 } 2 ] with solid‐state lithium ion conductivity have been synthesized by the addition of two equivalents of 1,2‐dimethoxybenzene or 1,2‐difluoro‐4,5‐dimethoxybenzene to Li{N(SO 2 CF 3 ) 2 }, respectively. Single‐crystal X‐ray diffraction analysis revealed the formation of ionic conduction paths with an ordered arrangement of lithium ions in these crystal structures, afforded by the self‐ assembled stacking of molecular‐based channels consisting of N(SO 2 CF 3 ) 2 anion and 1,2‐dimethoxybenzene frameworks as a result of intermolecular aromatic and hydrogen interactions. These compounds show selective lithium ion conductivity as the anions behave as a component unit of the conduction paths. The relationship between the crystal structure and ionic conductivity of the molecular crystals provides a clue to the development of novel solid electrolytes based on molecular crystals showing fast and selective lithium ion conduction.