Hierarchical ZnO@MnO2 Core-Shell Pillar Arrays on Ni Foam for Binder-Free Supercapacitor Electrodes

被引:82
|
作者
Huang, Ming [1 ,2 ]
Li, Fei [1 ]
Zhao, Xiao Li [1 ]
Luo, Da [3 ]
You, Xue Qiu [4 ]
Zhang, Yu Xin [1 ,5 ]
Li, Gang [6 ]
机构
[1] Chongqing Univ, Coll Mat Sci & Engn, Chongqing 400044, Peoples R China
[2] Ulsan Natl Inst Sci & Technol, Sch Mat Sci & Engn, Ulsan 689798, South Korea
[3] Peking Univ, Coll Chem & Mol Engn, Beijing 100871, Peoples R China
[4] Korea Univ, Sch Elect Engn, Seoul, South Korea
[5] Chongqing Univ, Natl Key Lab Fundamental Sci Micro Nanodevices &, Chongqing 400044, Peoples R China
[6] Northwest Inst Nonferrous Met Res, State Key Lab Porous Met Mat, Xian 710016, Peoples R China
基金
中国国家自然科学基金;
关键词
Hierarchical; Zinc oxide; Manganese dioxide; Core-shell; Supercapacitors; NANOSHEET ARRAYS; FACILE SYNTHESIS; MNO2; NANOSHEETS; NANOWIRES; NANOTUBES;
D O I
10.1016/j.electacta.2014.11.127
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
Hierarchical ZnO@MnO2 core-shell pillar arrays on Ni foam have been fabricated by a facile two-step hydrothermal approach and further investigated as the binder-free electrode for supercapacitors. The core-shell hybrid nanostructure is achieved by decorating ultrathin self-standing MnO2 nanosheets on ZnO pillar arrays grown radically on Nickel foam. This unique well-designed binder-free electrode exhibits a high specific capacitance (423.5 F g(-1) at a current density of 0.5 Ag-1), and excellent cycling stability (92% capacitance retention after 3000 cycles). The improved electrochemical results show that the ZnO@MnO2 core-shell nanostructure electrode is promising for high-performance supercapacitors. The facile design of the unique core-shell array architectures provides a new and effective approach to fabricate high-performance binder-free electrode for supercapacitors. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码:172 / 177
页数:6
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