Cathode Based on Molybdenum Disulfide Nanoflakes for Lithium-Oxygen Batteries

被引：196

作者：

Asadi, Mohammad ^{[1
]}

Kumar, Bijandra ^{[1
]}

Liu, Cong ^{[3
]}

Phillips, Patrick ^{[2
]}

Yasaei, Poya ^{[1
]}

Behranginia, Amirhossein ^{[1
]}

Zapol, Peter ^{[3
]}

Klie, Robert F. ^{[2
]}

Curtiss, Larry A. ^{[3
]}

Salehi-Khojin, Amin ^{[1
]}

机构：

[1] Univ Illinois, Dept Mech & Ind Engn, Chicago, IL 60607 USA

[2] Univ Illinois, Dept Phys, Chicago, IL 60607 USA

[3] Argonne Natl Lab, Div Mat Sci, 9700 S Cass Ave, Argonne, IL 60439 USA

来源：

ACS NANO | 2016年 / 10卷 / 02期

关键词：

lithium-O-2; batteries; ORR; OER; catalysts; molybdenum disulfide; ionic liquid; ACTIVE EDGE SITES; ENERGY DENSITY; LI-O-2; BATTERY; AIR BATTERIES; ATOMIC LAYERS; IN-SITU; ELECTRODE; MOS2; NANOSHEETS; REDUCTION;

D O I：

10.1021/acsnano.5b06672

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Lithium-oxygen (Li-O-2) batteries have been recognized as an emerging technology for energy storage systems owing to their high theoretical specific energy. One challenge is to find an electrolyte/cathode system that is efficient, stable, and cost-effective. We present such a system based on molybdenum disulfide (MoS2) nanoflakes combined with an ionic liquid (IL) that work together as an effective cocatalyst for discharge and charge in a Li-O-2 battery. Cyclic voltammetry results show superior catalytic performance for this cocatalyst for both oxygen reduction and evolution reactions compared to Au and Pt catalysts. It also performs remarkably well in the Li-O-2 battery system with 85% round-trip efficiency and reversibility up to 50 cycles. Density functional calculations provide a mechanistic understanding of the MoS2 nanoflakes/IL system. cocatalyst reported in this work could open the way for exploiting the unique properties of ionic liquids in Li-air batteries in combination with nanostructured MoS2 as a cathode material.

引用

页码：2167 / 2175

页数：9

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