期刊
ELECTROCHIMICA ACTA
卷 168, 期 -, 页码 97-103出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2015.04.018
关键词
Bismuth subcarbonate; Manganese dioxide; Supercapacitor; Nanocomposite; Electrochemistry
资金
- National Natural Science Foundation of China [51104194]
- Doctoral Fund of Ministry of Education of China [20110191120014]
- National Key laboratory of Fundamental Science of Micro/Nano-device and System Technology (Chongqing University) [2013MS06]
- Fundamental Research Funds for the Central Universities (Chongqing University, PR China) [CDJZR14135501, CDJZR13130035]
- State Education Ministry
Manganese dioxide (MnO2)-decorated flower-like bismuth subcarbonate ((BiO)(2)CO3) and calcined product (Bi2O3) have been uniformly fabricated via a hydrothermal approach, and further investigated as the electrodes for supercapacitor. Both of the core-shell nanostructures displayed moderate capacities (196 F g (1) or 54.5 mAhg (1) for (BiO)(2)CO3@MnO2 and 139.4 F g (1) or 38.7 mAhg (1) for Bi2O3@MnO2) with superb cycling stability (125% for (BiO)(2)CO3@MnO2 and 112% for Bi2O3@MnO2 after 1000 cycles). The electrochemical properties of the electrode are strongly related to their high surface area, porous structure and good conductivity, which cannot only provide rich active sites but also shorten the ion transport pathways. (C) 2015 Elsevier Ltd. All rights reserved.
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