Formation of ultrafine three-dimensional hierarchical birnessite-type MnO2 nanoflowers for supercapacitor

被引：110

作者：

Yan, Dongliang ^{[1
]}

Zhang, Huan ^{[1
]}

Li, Shichao ^{[1
]}

Zhu, Guisheng ^{[1
]}

Wang, Zhongmin ^{[1
]}

Xu, Huarui ^{[1
]}

Yu, Aibing ^{[2
]}

机构：

[1] Guilin Univ Elect Technol, Guangxi Key Lab Informat Mat, Guilin 541004, Peoples R China

[2] Univ New S Wales, Sch Mat Sci & Engn, Sydney, NSW 2052, Australia

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2014年 / 607卷

基金：

中国国家自然科学基金;

关键词：

Oxide materials; Ultrafine; Nanostructured materials; Energy storage materials; Supercapacitor; HYDROTHERMAL SYNTHESIS; ELECTROCHEMICAL PROPERTIES; MANGANESE-DIOXIDE; FLOWER-LIKE; OXIDE; NANOSTRUCTURES; FILM; MICROSPHERES; NANOSPHERES; NANORODS;

D O I：

10.1016/j.jallcom.2014.04.077

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：

Ultrafine (50-100 nm in diameter) birnessite-type MnO2 nanoflowers assembled by numerous ultrathin nanosheets (3-6 nm in thickness and 30-50 nm in width) have been synthesized via a simple and scalable solution route under ambient conditions. The ratio of reactants plays a significant role in the formation of MnO2 nanoflowers and the as-prepared MnO2 hierarchical nanostructure exhibits excellent electrochemical performance with high specific capacitance (251.3 Fg (1) at 0.5 Ag (1)) and superior cycling stability (only 7.5% SC loss after 10,000 cycling test) and good rate capability. The unique microstructures of MnO2 nanoflowers are responsible for their superior electrochemical properties, and thus it may be a promising for supercapacitor application. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：245 / 250

页数：6

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