期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 779, 期 -, 页码 728-734出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2018.11.234
关键词
SnO2; Hollow nanosphere; Supercapacitor; Electrochemical performance
资金
- Scientific Research Foundation of Yunnan Educational Committee [2017ZZX183]
- Basic Research Special Program of Yunnan Province [2017FH001-049]
- Program of Yunnan Key Laboratory of Micro/Nano Materials and Technology [2016DG005]
- National Science Foundation of China [51764048]
Hollow SnO2 nanospheres have been successfully fabricated through a simple hydrothermal method by using carbon spheres as template. Microstructure observation showed that the hollow SnO2 had uniform nanoscale size and single-shelled structure assembled by individual nanocrystallines. Being employed as the supercapacitor electrode materials, the resultant hollow SnO2 nanospheres displayed a considerable specific capacitance of 332.7 F/g at a current density of 1 A/g, much higher than the pristine SnO2 particles (143.5 F/g). The hollow SnO2 also exhibited good rate capability remained relatively high capacitance of 174.9 F/g at a large current density of 20 A/g, as well as excellent cycling properties without capacitance degradation over 2000 charging/discharging cycles. Such excellent electrochemical performance of the hollow SnO2 nanosphere can be attributed to its unique nanosized and single-shelled hollow structure which greatly increases the available surface area and providing hierarchical porosity for the electrode materials. (C) 2018 Elsevier B.V. All rights reserved.
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