title: An advanced lithium-air battery exploiting an ionic liquid-based electrolyte.
abstract: A novel lithium-oxygen battery exploiting PYR14TFSI-LiTFSI as ionic liquid-based electrolyte medium is reported. The Li/PYR14TFSI-LiTFSI/O2 battery was fully characterized by electrochemical impedance spectroscopy, capacity-limited cycling, field emission scanning electron microscopy, high-resolution transmission electron microscopy, and X-ray photoelectron spectroscopy. The results of this extensive study demonstrate that this new Li/O2 cell is characterized by a stable electrode-electrolyte interface and a highly reversible charge-discharge cycling behavior. Most remarkably, the charge process (oxygen oxidation reaction) is characterized by a very low overvoltage, enhancing the energy efficiency to 82%, thus, addressing one of the most critical issues preventing the practical application of lithium-oxygen batteries.
authors.affiliation: Chemistry Department, University of Rome - La Sapienza , 00185 Rome, Italy.
authors.forename: G A
authors.initials: GA
authors.lastname: Elia
authors.forename: J
authors.initials: J
authors.lastname: Hassoun
authors.forename: W-J
authors.initials: WJ
authors.lastname: Kwak
authors.forename: Y-K
authors.initials: YK
authors.lastname: Sun
authors.forename: B
authors.initials: B
authors.lastname: Scrosati
authors.forename: F
authors.initials: F
authors.lastname: Mueller
authors.forename: D
authors.initials: D
authors.lastname: Bresser
authors.forename: S
authors.initials: S
authors.lastname: Passerini
authors.forename: P
authors.initials: P
authors.lastname: Oberhumer
authors.forename: N
authors.initials: N
authors.lastname: Tsiouvaras
authors.forename: J
authors.initials: J
authors.lastname: Reiter
keywords: Li−O2 cell; electrolyte; energy efficiency; ionic liquid; lithium−oxygen battery