Journal
APPLIED SURFACE SCIENCE
Volume 479, Issue -, Pages 896-902Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2019.02.145
Keywords
Silicon nanoparticles; Carbon modification; Hierarchical structure; Anode; Lithium-ion battery
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Funding
- National Natural Science Foundation of China [51504171, 51572100]
- Major Project of Technological Innovation Special Fund of Hubei Province [2018AAA011]
- Hong Kong Scholars Program [XJ2018009]
- HUST Key Interdisciplinary Team Project [2016JCTD101]
- Fundamental Research Funds for the Central Universities [HUST: 2015QN071]
- Wuhan Yellow Crane Talents Program
- Research Grants Council, University Grants Committee (RGC) General Research Funds (GRF) [CityU 11205617]
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Although silicon (Si) is regarded as one of promising anode materials in next-generation lithium-ion batteries (LIBs) due to the high specific capacity, commercial application is stifled by the large volume effect and small electric conductivity. Using rice husk (RH) biomass as nano Si source (RH-Nano Si), here we designed and fabricated the three-dimensional (3D) carbon-hybridized nano-Si hierarchical architecture composite (RH-Nano Si@C/CNT) via assembling Si with CNT by the self-electrostatic route, reinforcing by hydrothermal treating in a glucose solution, and calcination in Ar. In RH-Nano Si@C/CNT, the Si nanoparticles are anchored on the 3D conducive CNT network by the glucose-derived carbon through welding and coating, thus providing enhanced electrical contact and high structural integrity. As anode materials, RH-Nano Si@C/CNT exhibits improved rate capability and prolonged cycling stability compared to Si and CNT self-electrostatic sample. Boasting a high reversible capacity of 989.5 mAh g(-1) at 0.5C (1C = 4.2 A g(-1)) and 345 mAh g(-1) at 3C as well as low capacity decay of 0.035% per cycles after 1000 cycles, RH-Nano Si@C/CNT produced by this technique is promising as anodes in LIBs.
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