Interphase Evolution of a Lithium-Ion/Oxygen Battery

Giuseppe Antonio Elia (1) , Dominic Bresser (2, 3, 4) , Jakub Reiter (5) , Philipp Oberhumer (5) , Yang-Kook Sun (6) , Bruno Scrosati (1) , Stefano Passerini (4, 3) , Jusef Hassoun (1)

1 Dipartimento di Chimica
2 PCI - Polymères Conducteurs Ioniques
3 KIT - Karlsruhe Institute of Technology
4 HIU - Helmhotlz Institute of Ulm
5 BMW
6 Hanyang University

A novel lithium-ion/oxygen battery employing Pyr(14)FSI-LiTESI 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.

Mots clés: Lithium-Ion Battery; Ionic Liquid Electrolyte; High Efficiency; Safety; Liquid-Based Electrolytes; Ion Oxygen Battery; Polymer Electrolyte; Li-O-2 Batteries; Air Batteries; Performance; Bis(Trifluoromethanesulfonyl)Imide; Electrochemistry; Stability; Cells

Domaines: Physique [physics]

Giuseppe Antonio Elia, Dominic Bresser, Jakub Reiter, Philipp Oberhumer, Yang-Kook Sun, et al.. Interphase Evolution of a Lithium-Ion/Oxygen Battery. ACS Applied Materials & Interfaces, 2015, 7 (40), pp.22638-22643. ⟨10.1021/acsami.5b07414⟩. ⟨hal-01590245⟩