Morphological and Crystalline Evolution of Nanostructured MnO2 and Its Application in Lithium-Air Batteries

被引：264

作者：

Truong, Tu T. ^{[1
]}

Liu, Yuzi ^{[1
]}

Ren, Yang ^{[2
]}

Trahey, Lynn ^{[3
]}

Sun, Yugang ^{[1
]}

机构：

[1] Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL 60439 USA

[2] Argonne Natl Lab, Xray Sci Div, Adv Photon Source, Argonne, IL 60439 USA

[3] Argonne Natl Lab, Chem Sci & Engn Div, Argonne, IL 60439 USA

来源：

ACS NANO | 2012年 / 6卷 / 09期

关键词：

microwave synthesis; nanostructured manganese oxide; morphological control; electrochemical catalyst; lithium-air batteries; HYDROTHERMAL SYNTHESIS; ALPHA-MNO2; NANOWIRES; MANGANESE-DIOXIDE; NANOTUBES;

D O I：

10.1021/nn302654p

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Single-crystal alpha-MnO2 nanotubes have been successfully synthesized by microwave-assisted hydrothermal of potassium permanganate in the presence of hydrochloric acid. The growth mechanism including the morphological and crystalline evolution has been carefully studied with time-dependent X-ray diffraction, electron microscopy, and controlled synthesis. The as-synthesized MnO2 nanostructures are incorporated in air cathodes of lithium-air batteries as electrocatalysts for the oxygen reduction and evolution reactions. The characterization reveals that the electrodes made of single-crystalline alpha-MnO2 nanotubes exhibit much better stability than those made of alpha-MnO2 nanowires and delta-MnO2 nanosheet-based microflowers in both charge and discharge processes.

引用

页码：8067 / 8077

页数：11

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