Open AccessLigand Exchange Conduction of Lithium Ion in a Pentaglyme-Lithium Bis(trifluoromethylsulfonyl)amide Super-Concentrated Electrolyte
Author(s) -
Atsushi Kitada,
Kio Kawata,
Masahiro Shimizu,
Masayuki Saimura,
Takashi Nagata,
Masato Katahira,
Kazuhiro Fukami,
Kuniaki Murase
Publication year - 2021
Publication title -
journal of the electrochemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.258
H-Index - 271
eISSN - 1945-7111
pISSN - 0013-4651
DOI - 10.1149/1945-7111/abda03
Subject(s) - diglyme , chemistry , electrolyte , lithium (medication) , ligand (biochemistry) , thermal conduction , amide , ion , electrochemistry , solvent , inorganic chemistry , molecule , electrode , materials science , organic chemistry , medicine , biochemistry , receptor , endocrinology , composite material
Ligand exchange conduction or hopping conduction which means ions move faster than their ligands or solvents, is one of the striking phenomena in electrochemistry. Here, we report a glyme-based electrolyte where ligand exchange conduction takes place. The electrolyte is a concentrated pentaglyme (G5) solution of lithium bis(trifluoromethylsulfonyl)amide (LiTf 2 N; Tf = SO 2 CF 3 ) with molar ratio of [G5]/[LiTf 2 N] = 1/2. Since a diglyme (G2) solution [G2]/[LiTf 2 N] = 1/1 which has the same molar ratio of ether oxygen to Li + ([O]/[Li + ] = 3) does not show ligand exchange conduction, the glyme chain length may need to be long enough to bridge Li + ions, by which the momentum exchange of Li + ions via solvent molecules is allowed.