期刊
MATERIALS LETTERS
卷 130, 期 -, 页码 107-110出版社
ELSEVIER
DOI: 10.1016/j.matlet.2014.05.090
关键词
Supercapacitors; Manganese oxide; Tin oxide; Nanocomposites; Energy storage and conversion
资金
- PAPD
- Fundamental Research Funds for the Central Universities
- Natural Science Research Program for Universities of Jiangsu Province
- Research Innovation Program for College Students of Jiangsu Province
- Innovation Fund of Jiangsu Province
- National Natural Science Foundation of China
- State Key Program for Basic Research of China
A facile, low-cost synthesis of MnO2@SnO2 core-shell heterostructured nanorods with superior super-capacitance is proposed. The synthesis involves sensitizing MnO2 nanorods with an aqueous SnCl2 solution to ensure the formation of a thin, uniform, and complete shell layer. The SnO2 coatings have rough surfaces and their thickness is about 18 nm. The MnO2@SnO2 composites have a specific capacitance of 367.5 F/g at 50 mV/s in 1 M Na2SO4, which is about four and six times of the pure MnO2 nanorods and SnO2 products. Meanwhile, they have 91.3% capacitance retention over 2000 cycles, which is much better than pure MnO2 nanorods. The remarkable performances with a low-cost imply that they have potential for supercapacitors applications. (C) 2014 Elsevier B.V. All rights reserved.
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