Fabrication of hollow carbonaceous nanospheres and their applications in lithium-ion batteries
- Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, Department of Polymer Science and Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123 (China)
Highlights: • SiO{sub 2}@SiO{sub 2}/RF resin composite nanospheres are prepared via a dual-templating method. • Hollow carbon nanospheres with large surface area are obtained after carbonization. • Hollow C/SiC composite nanospheres are produced after magnesiothermic reduction. • The carbonaceous nanospheres show superior electrochemical performance. • SiC nanomaterials can serve as candidate for LIBs anode materials. - Abstract: This paper presents a facile method for preparing hollow carbonaceous nanospheres for use in advanced Li-ion batteries (LIBs). Core–shell-structured silica@resin/silica nanosphere composites were used as the starting material. Hollow carbon nanospheres with a high specific surface area, i.e., 1389 m{sup 2} g{sup −1}, and C/SiC composite nanospheres composed of 24.4 wt.% amorphous carbon and 75.6 wt.% cubic β-SiC were obtained. Electrochemical measurements showed that the hollow carbon nanospheres delivered a reversible capacity of 553.5 mA h g{sup −1} after 100 cycles, which is higher than the theoretical capacity of graphite. A C/SiC composite nanosphere electrode gave a reversible capacity of 296 mA h g{sup −1} after 500 cycles. The results show that these nanospheres are promising candidates for use in LIB anodes.
- OSTI ID:
- 22803994
- Journal Information:
- Materials Research Bulletin, Journal Name: Materials Research Bulletin Vol. 102; ISSN MRBUAC; ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
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