An Advanced Lithium-Air Battery Exploiting an Ionic Liquid-Based Electrolyte

作者：Elia G A; Hassoun J^*; Kwak W J; Sun Y K; Scrosati B; Mueller F; Bresser D; Passerini S; Oberhumer P; Tsiouvaras N; Reiter J

来源：Nano Letters, 2014, 14(11): 6572-6577.

DOI：10.1021/nl5031985

• Li-O-2 cell
• ionic liquied
• electrolyte
• energy efficiency
• lithium-oxygen battery

A novel lithium-oxygen battery exploiting PYR14TFSI-LiTFSI as ionic liquid-based electrolyte medium is reported. The Li/PYR14TFSI-LiTFSI/O-2 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/O-2 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.

• 出版日期2014-11