Method Development to Evaluate the Oxygen Reduction Activity of High-Surface-Area Catalysts for Li-Air Batteries

被引：62

作者：

Lu, Yi-Chun ^{[1
,3
]}

Gasteiger, Hubert A. ^{[2
,3
,4
]}

Shao-Horn, Yang ^{[1
,2
,3
]}

机构：

[1] MIT, Dept Mat Sci & Engn, Cambridge, MA 02139 USA

[2] MIT, Dept Mech Engn, Cambridge, MA 02139 USA

[3] MIT, Electrochem Energy Lab, Cambridge, MA 02139 USA

[4] Tech Univ Munich, Dept Chem, D-85747 Garching, Germany

来源：

ELECTROCHEMICAL AND SOLID STATE LETTERS | 2011年 / 14卷 / 05期

基金：

美国国家科学基金会;

关键词：

ELECTRODE; PERFORMANCE; DISCHARGE;

D O I：

10.1149/1.3555071

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

This study presents a new method to quantitatively determine the electrocatalytic activity of Vulcan carbon and Vulcan-supported Au nanoparticles, dispersed as catalyst thin films on glass carbon, for oxygen reduction in an aprotic electrolyte using rotating disk electrode measurements. The ORR activity of Vulcan carbon can be described by a Tafel slope of 120 mV/ dec and Levich-Koutecky analysis of Vulcan carbon suggests that solvated LiO2 is the initially formed O-2 reduction product. Discharge voltages extrapolated from this thin-film method are in excellent agreements with those of Li-oxygen batteries demonstrating its validity to serve as an effective technique for catalyst screening. (C) 2011 The Electrochemical Society. [DOI: 10.1149/1.3555071] All rights reserved.

引用

页码：A70 / A74

页数：5

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