期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 513, 期 -, 页码 448-454出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2017.11.052
关键词
MnO2; Ultrathin; Hollow nanofibers; Supercapacitors; High-performance
资金
- National Natural Science Foundation of China [51602049, 51708504]
- China Postdoctoral Science Foundation [2017M610217]
- Fundamental Research Funds for the Central Universities
One dimensional (1D) hollow nanostructures have been considered as one of the most fascinating materials for supercapacitors. Herein, the hollow MnO2 nanofibers are successfully synthesized through a two-step process, in which the electrospun carbon nanofibers acted as sacrificial template. The resulting hollow nanofibers are composed of ultrathin MnO2 nanosheets, which can offer rich electrochemical active sites for electrochemical reactions. Importantly, the open and free interspaces among these ultrathin MnO2 nanosheets can significantly enhance the utilization of the active material even at high current density. Such unique hollow nanostructure endow the hollow MnO2 nanofibers electrode better electrochemical performance with specific capacitance of 291 Fig at 1 A/g, superior rate capability of similar to 73% (from 1 to 10 A/g), and excellent cycling stability of 90.9% retention after 5000 cycles, demonstrating the potential for practical application in energy storage devices. (C) 2017 Elsevier Inc. All rights reserved.
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