Enhancement of oxygen reduction reaction rate by addition of water to an oxidatively stable ionic liquid electrolyte for lithium-air cells

被引：19

作者：

Sankarasubramanian, Shrihari ^{[1
]}

Seo, Jeongwook ^{[1
]}

Mizuno, Fuminori ^{[2
,3
]}

Singh, Nikhilendra ^{[2
]}

Takechi, Kensuke ^{[2
]}

Prakash, Jai ^{[1
]}

机构：

[1] IIT, Dept Chem & Biol Engn, Ctr Electrochem Sci & Engn, 10 West 33rd St, Chicago, IL 60616 USA

[2] Toyota Res Inst North Amer, 1555 Woodridge Ave, Ann Arbor, MI 48105 USA

[3] Toyota Motor Co Ltd, Higashifuji Tech Ctr, Battery Mat Engn & Res Div, 1200 Mishuku, Susono, Shizuoka 4101193, Japan

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2016年 / 73卷

关键词：

Oxygen reduction reaction; Lithium-air battery; Ionic liquid; Rotating disk electrode; Superoxide; NANOSTRUCTURAL ORGANIZATION; LI-O-2; BATTERIES; SURFACES; ELECTROCHEMISTRY; MECHANISM; METAL;

D O I：

10.1016/j.elecom.2016.11.001

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The oxygen reduction reaction in an ionic liquid (IL) consisting of N, N-diethyl-N-methyl-N-(2-methoxyethyl) ammonium(DEME) cation and the bis(trifluoromethanesulfonyl) imide (TFSI) anion was investigated in the anhydrous and water saturated conditions respectively. The IL was demonstrated to be stable in the operating range of a lithium air cell in both the anhydrous and water saturated conditions. The addition of water was found to lower the overpotential for the oxygen reduction reaction by 40 mV. Finally, the reaction rate constant was found to increase by an order of magnitude with the addition of water hence demonstrating the tendency of water to promote/catalyze the oxygen electrochemistry in non-aqueous systems. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：55 / 58

页数：4

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