Controlled synthesis of hierarchical birnessite-type MnO2 nanoflowers for supercapacitor applications

被引：122
作者：
Zhao, Shuoqing [1 ,2 ]
Liu, Tianmo [1 ,2 ]
Hou, Dewen [1 ,2 ]
Zeng, Wen [1 ,2 ]
Miao, Bin [1 ,2 ]
Hussain, Shahid [1 ,2 ]
Peng, Xianghe [1 ,2 ]
Javed, Muhammad Sufyan [3 ]
机构：
[1] Chongqing Univ, Coll Mat Sci & Engn, Chongqing 400030, Peoples R China
[2] Chongqing Univ, Natl Engn Res Ctr Magnesium Alloys, Chongqing 400030, Peoples R China
[3] Chongqing Univ, Dept Appl Phys, Chongqing 400044, Peoples R China
来源：
APPLIED SURFACE SCIENCE | 2015年 / 356卷
基金：
中国国家自然科学基金;
关键词：
Hydrothermal; Supercapacitor; Birnessite-type MnO2; Nanoflower; Specific capacitance; HIGH-PERFORMANCE; HYDROTHERMAL SYNTHESIS; ELECTRODE MATERIALS; THIN-FILMS; NANOSTRUCTURES; NANOSHEETS; DESIGN; ARRAYS; OXIDE;
D O I：
10.1016/j.apsusc.2015.08.037
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：
Birnessite-type MnO2 nanoflowers assembled by hierarchical nanosheets were successfully synthesized via a facile and simple hydrothermal process. The ration of reactants is a critical factor affects formation process of MnO2 nanoflowers. The electrochemical test of the as-synthesized birnessite-type MnO2 exhibits excellent electrochemical property with ideal voltammetry behavior, high specific capacitance (197.3 F g(-1) at 1 A g(-1)) and superior cycling stability (only 5.4% capacitance loss after 1000 cycling test). The distinct hierarchical nanostructure and impressive electrochemical performances suggest the birnessite-type MnO2 is a promising material for supercapacitor applications. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：259 / 265
页数：7
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