A Solvate Ionic Liquid as the Anolyte for Aqueous Rechargeable Li-O2 Batteries

被引：30

作者：

Wang, Hui ^{[1
]}

Sunahiro, Shogo ^{[1
]}

Matsui, Masaki ^{[1
,2
]}

Zhang, Peng ^{[1
]}

Takeda, Yasuo ^{[1
]}

Yamamoto, Osamu ^{[1
]}

Imanishi, Nobuyuki ^{[1
]}

机构：

[1] Mie Univ, Dept Chem, Fac Engn, Tsu, Mie 5148507, Japan

[2] Japan Sci & Technol Agcy, PRESTO, Kawaguchi, Saitama 3320012, Japan

来源：

CHEMELECTROCHEM | 2015年 / 2卷 / 08期

基金：

日本科学技术振兴机构;

关键词：

anolyte; aqueous batteries; ionic liquids; lithium; protected lithium electrodes; LITHIUM-METAL BATTERIES; POLYMER ELECTROLYTES; DENDRITIC GROWTH; AIR BATTERIES; LI; COMPLEXES; CONDUCTIVITY; SPECTROSCOPY; ELECTRODES; DEPOSITION;

D O I：

10.1002/celc.201500113

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

A reversible high-areal-capacity metallic lithium anode is pivotal to develop high specific-energy-density lithium-metal-based batteries. A novel solvate ionic liquid has been prepared by mixing tetraethylene glycol dimethyl ether (G4) and lithium bis(fluorosulfonyl)imide (LiFSI). Raman measurements revealed that the solvent was completely complexed by lithium cations to form a solvate ionic liquid (SIL) when the molar ratio of solvent to lithium cations was lower than 2. A symmetrical Li/LiFSI-2G4/Li cell showed no short circuit for 41.2h, until the capacity of the loaded lithium anode at 1mAcm(-2) and 60 degrees C was reached. A metallic lithium anode could deliver a high areal capacity of 12mAhcm(-2) for 40 cycles in the SIL of LiFSI-2G4 with a current density as high as 6mAcm(-2) at 60 degrees C. This novel SIL of LiFSI-2G4 as an anolyte coupled with lithium metal allows favorable cyclability for a high specific-energy-density aqueous lithium-O-2 cell.

引用

页码：1144 / 1151

页数：8

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