Gold-Palladium nanoparticles supported by mesoporous β-MnO2 air electrode for rechargeable Li-Air battery

被引：56
|
作者：
Thapa, Arjun Kumar [1 ,2 ]
Shin, Tae Ho [2 ]
Ida, Shintaro [2 ]
Sumanasekera, Gamini U. [1 ]
Sunkara, Mahendra K. [1 ]
Ishihara, Tatsumi [2 ]
机构：
[1] Univ Louisville, Conn Ctr Renewable Energy Res, Louisville, KY 40292 USA
[2] Kyushu Univ, Dept Appl Chem, Nishi Ku, Fukuoka 8190395, Japan
来源：
JOURNAL OF POWER SOURCES | 2012年 / 220卷
关键词：
Gold-Palladium nanoparticles; Mesoporous beta-MnO2; Raman spectroscopy; Ex-situ XRD; Li-Air battery; AT-PD SURFACES; LITHIUM BATTERIES; CATALYST; NANOWIRES; H2O2;
D O I：
10.1016/j.jpowsour.2012.08.003
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 electrochemical performance and electrode reaction using Au-Pd nanoparticle (NP) supported mesoporous beta-MnO2 as a cathode catalyst for rechargeable Lithium-Air (Li-Air) battery is reported here for the first time. In this study, Au-Pd NP-supported mesoporous beta-MnO2 was successfully synthesized by hydrothermal process using a silica KIT-6 template. It has an initial discharge capacity of ca. 775 mAh g(-1) with high reversible capacity at a current density of 0.13 mA cm(-2). The Au-Pd NP-supported mesoporous beta-MnO2 cathode catalyst, which enhances the kinetic of oxygen reduction and evolution reactions (ORR/OERs), thereby improves energy and coulombic efficiency of the Li-Air cell. Raman spectroscopy and ex-situ XRD results of the Au-Pd NP-supported mesoporous beta-MnO2 air electrode suggest that the observed capacity comes from oxidation of Li+ to form Li2O2 during discharge to 2.0 V. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：211 / 216
页数：6
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