期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 3, 期 6, 页码 2748-2755出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ta05434b
关键词
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资金
- National Science Foundation of China [21377044]
- Wuhan Planning Project of Science and Technology [2014010101010023]
- self-determined research funds of CCNU from the college basic research and operation of MOE [CCNU13F027]
The problems of the large volume change during Li insertion and extraction and poor high-power performance of SnO2-based electrodes should be solved for their practical application. Herein, a novel SnO2/C hybrid triple-type nanosphere, in which a layer of amorphous carbon was sandwiched between the layers of the SnO2 and carbon composite, has been designed and fabricated by a top-down approach. Due to its special structure, this kind of SnO2-based electrode exhibited a considerable capacitive performance, offering a greatly enhanced cycling stability and rate capability. Its capacity remained as high as 653 mA h g(-1) after the 350th cycle. The irreversible capacity decay was unprecedentedly extended to the 80th cycle. What is more, this electrode even exhibited a capacity of 260mA h g(-1) at 20 degrees C, with a fading of less than 16% after 600 cycles and less than 22% even after 1000 cycles.
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