Evidence of catalyzed oxidation of Li2O2 for rechargeable Li-air battery applications

被引：139

作者：

Harding, Jonathon R. ^{[2
]}

Lu, Yi-Chun ^{[1
]}

Tsukada, Yasuhiro ^{[3
]}

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

机构：

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

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

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

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2012年 / 14卷 / 30期

基金：

美国国家科学基金会;

关键词：

LITHIUM-OXYGEN BATTERY; LI-O-2; BATTERIES; ELECTROLYTES; ELECTRODES; SOLVENTS; ELECTROCHEMISTRY; CHALLENGES; DISCHARGE; CATHODE; ION;

D O I：

10.1039/c2cp41761h

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The oxidation kinetics of Li2O2 was studied in a carbonate-free electrolyte using electrodes consisting of non-catalyzed and catalyzed Vulcan carbon (VC) and chemically synthesized Li2O2 particles. VC and Au nanoparticles supported on VC (Au/C) were fairly inactive for catalyzing the oxidation of Li2O2, where oxidation currents greater than 10 mA g(carbon)(-1) were found only at voltages equal to and greater than 4.0 V vs. Li (V-Li). Pt and Ru nanoparticles supported on VC (Pt/C and Ru/C) could significantly increase the kinetics of Li2O2 oxidation, where Li2O2 could be removed largely at voltages below 4 V-Li. In addition, Pt/C and Ru/C showed quick initiation of Li2O2 oxidation in contrast to VC and Au/C.

引用

页码：10540 / 10546

页数：7

共 26 条

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