期刊
JOURNAL OF POWER SOURCES
卷 277, 期 -, 页码 36-43出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2014.12.005
关键词
Manganese dioxide; Hydrothermal; Binder-free; Asymmetric supercapacitors
资金
- National Natural Science Foundation of China [51104194]
- National Key laboratory of Fundamental Science of Micro/Nano-device and System Technology [2013MS06]
- State Education Ministry and Fundamental Research Funds for the Central Universities (Chongqing University, PR China) [CDJZR14135501, CDJZR13130035]
- King Abdullah University of Science and Technology, Saudi Arabia
Ultrathin MnO2 nanosheets arrays on Ni foam have been fabricated by a facile hydrothermal approach and further investigated as the binder-free electrode for high-performance supercapacitors. This unique well-designed binder-free electrode exhibits a high specific capacitance (595.2 F g(-1) at a current density of 0.5 A g(-1)), good rate capability (64.1% retention), and excellent cycling stability (89% capacitance retention after 3000 cycles). Moreover, an asymmetric supercapacitor is constructed using the as-prepared MnO2 nanosheets arrays as the positive electrode and activated microwave exfoliated graphite oxide (MEGO) as the negative electrode. The optimized asymmetric supercapacitor displays excellent electrochemical performance with an energy density of 25.8 Wh kg(-1) and a maximum power density of 223.2 kW kg(-1). These impressive performances suggest that the MnO2 nanosheet array is a promising electrode material for supercapacitors. (C) 2014 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据