title: Interphase Evolution of a Lithium-Ion/Oxygen Battery.
abstract: A novel lithium-ion/oxygen battery employing Pyr14TFSI-LiTFSI as the electrolyte and nanostructured LixSn-C as the anode is reported. The remarkable energy content of the oxygen cathode, the replacement of the lithium metal anode by a nanostructured stable lithium-alloying composite, and the concomitant use of nonflammable ionic liquid-based electrolyte result in a new and intrinsically safer energy storage system. The lithium-ion/oxygen battery delivers a stable capacity of 500 mAh g(-1) at a working voltage of 2.4 V with a low charge-discharge polarization. However, further characterization of this new system by electrochemical impedance spectroscopy, scanning electron microscopy, and energy-dispersive X-ray spectroscopy reveals the progressive decrease of the battery working voltage, because of the crossover of oxygen through the electrolyte and its direct reaction with the LixSn-C anode.
authors.affiliation: Chemistry Department, University of Rome-La Sapienza , Piazzale Aldo Moro 5, 00185 Rome, Italy.
authors.forename: Giuseppe Antonio
authors.initials: GA
authors.lastname: Elia
authors.affiliation: Electrochemistry I, Helmholtz Institute Ulm (HIU) , Helmholtzstrasse 11, 89081 Ulm, Germany.|Karlsruher Institute of Technology (KIT) , P.O. Box 3640, 76021 Karlsruhe, Germany.|INAC/SPRAM/PCI, CEA Grenoble, UMR-5819, CEA-CNRS-UJF, 17 Rue de Martyrs, 38054 Grenoble, Cedex 9, France.
authors.forename: Dominic
authors.initials: D
authors.lastname: Bresser
authors.affiliation: BMW Group, Petuelring 130, 80788 Munich, Germany.
authors.forename: Jakub
authors.initials: J
authors.lastname: Reiter
authors.affiliation: BMW Group, Petuelring 130, 80788 Munich, Germany.
authors.forename: Philipp
authors.initials: P
authors.lastname: Oberhumer
authors.affiliation: Department of Energy Engineering, Hanyang University , Seoul 133-791, South Korea.
authors.forename: Yang-Kook
authors.initials: YK
authors.lastname: Sun
authors.affiliation: Elettrochimica ed Energia, 00199 Rome, Italy.
authors.forename: Bruno
authors.initials: B
authors.lastname: Scrosati
authors.affiliation: Electrochemistry I, Helmholtz Institute Ulm (HIU) , Helmholtzstrasse 11, 89081 Ulm, Germany.|Karlsruher Institute of Technology (KIT) , P.O. Box 3640, 76021 Karlsruhe, Germany.
authors.forename: Stefano
authors.initials: S
authors.lastname: Passerini
authors.affiliation: Chemistry Department, University of Rome-La Sapienza , Piazzale Aldo Moro 5, 00185 Rome, Italy.|Dipartimento di Scienze Chimiche e Farmaceutiche, Università di Ferrara , Via Fossato di Mortara 17, 44121 Ferrara, Italy.
authors.forename: Jusef
authors.initials: J
authors.lastname: Hassoun
keywords: Li/O2; high efficiency; ionic liquid electrolyte; lithium-ion battery; safety