The self-assembly of shape controlled functionalized graphene-MnO2 composites for application as supercapacitors

被引：95
作者：
Feng, Xiaomiao [1 ]
Chen, Ningna [1 ]
Zhang, Yu [1 ]
Yan, Zhenzhen [1 ]
Liu, Xingfen [1 ]
Ma, Yanwen [1 ]
Shen, Qingming [1 ]
Wang, Lianhui [1 ]
Huang, Wei [1 ]
机构：
[1] Nanjing Univ Posts & Telecommun, Sch Mat Sci & Engn, Inst Adv Mat, Key Lab Organ Elect & Informat Displays, Nanjing 210046, Jiangsu, Peoples R China
来源：
JOURNAL OF MATERIALS CHEMISTRY A | 2014年 / 2卷 / 24期
基金：
高等学校博士学科点专项科研基金; 中国国家自然科学基金;
关键词：
STEP HYDROTHERMAL METHOD; ELECTROCHEMICAL CAPACITORS; HIGH-PERFORMANCE; ELECTRODES; FILM; NANOSTRUCTURES; BATTERIES; SHEETS;
D O I：
10.1039/c3ta15402e
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：
Graphene-MnO2 nanocomposites with different morphologies were obtained by a facile self-assembly method. The formation mechanism of graphene-MnO2 composites with different shapes of MnO2 is discussed in detail. Nanostructured MnO2 with different morphologies was distributed on the surface of graphene uniformly. The prepared graphene-MnO2 composites could be used as electrode materials for supercapacitors. The graphene-MnO2 (flowerlike nanospheres) composite (405 F g(-1)) exhibited better capacitive performance than that of the graphene-MnO2 (nanowires) composite (318 F g(-1)) at a current density of 1.0 A g(-1). The synergistic effect of graphene and MnO2 endowed the composite with high electrochemical capacitance. Moreover, the graphene-MnO2 (flowerlike nanospheres) composite showed a fast charge-discharge process and high cyclic stability.
引用
收藏
页码：9178 / 9184
页数：7
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