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An Artificial Lithium Protective Layer that Enables the Use of Acetonitrile‐Based Electrolytes in Lithium Metal Batteries
Author(s) -
Trinh Ngoc Duc,
Lepage David,
AyméPerrot David,
Badia Antonella,
Dollé Mickael,
Rochefort Dominic
Publication year - 2018
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201801737
Subject(s) - passivation , electrolyte , acetonitrile , lithium (medication) , inorganic chemistry , electrochemistry , metal , materials science , lithium vanadium phosphate battery , battery (electricity) , solvent , layer (electronics) , chemistry , chemical engineering , nanotechnology , electrode , organic chemistry , metallurgy , medicine , power (physics) , quantum mechanics , physics , endocrinology , engineering
The resurgence of the lithium metal battery requires innovations in technology, including the use of non‐conventional liquid electrolytes. The inherent electrochemical potential of lithium metal (−3.04 V vs. SHE) inevitably limits its use in many solvents, such as acetonitrile, which could provide electrolytes with increased conductivity. The aim of this work is to produce an artificial passivation layer at the lithium metal/electrolyte interface that is electrochemically stable in acetonitrile‐based electrolytes. To produce such a stable interface, the lithium metal was immersed in fluoroethylene carbonate (FEC) to generate a passivation layer via the spontaneous decomposition of the solvent. With this passivation layer, the chemical stability of lithium metal is shown for the first time in 1 m LiPF 6 in acetonitrile.