Acta Phys. -Chim. Sin. ›› 2015, Vol. 31 ›› Issue (3): 583-588.doi: 10.3866/PKU.WHXB201501212

• PHYSICAL CHEMISTRY OF MATERIALS • Previous Articles     Next Articles

Preparation and Structure Regulation of Silicon Carbide-Derived Carbon/ Spherical Natural Graphite Composites

DU Xue-Lian1,2, CONG Ye1,2, JIANG Lu2, LI Xuan-Ke1,2, CUI Zheng-Wei2, DONG Zhi-Jun2, YUAN Guan-Ming2, ZHANG Jiang2   

  1. 1. The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, P. R. China;
    2. Hubei Province Key Laboratory of Coal Conversion & New Carbon Materials, Wuhan University of Science and Technology, Wuhan 430081, P. R. China
  • Received:2014-12-09 Revised:2015-01-20 Published:2015-03-06
  • Contact: CONG Ye, LI Xuan-Ke E-mail:congye626@126.com;xkli8524@sina.com
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (51472186, 51402221).

Abstract:

To meet the requirements of the energy storage materials for high energy density and high power density, porous silicon carbide/derived carbon-spherical natural graphite (SiC-CDCs@NG) composites were prepared. The composites were composed of tailored porous carbide-derived carbon and graphitized carbon with excellent conductivity and a high energy storage capacity. The composition, structure, morphology, pore structure, and specific surface area of the composites were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Raman spectroscopy, and N2 adsorption/ desorption analysis. The composites exhibited a high and adjustable specific surface area and micro-pore volume, with a micro-pore size of between 0.5 and 0.7 nm. Varying the molar ratio of NG and Si allowed optimization of the micro-pore volume, pore size distribution, specific surface area, and composition and content of the CDCs shell and NG core.

Key words: Silicon carbide-derived carbon, Composite, Structure regulation, Specific surface area, Pore size distribution

MSC2000: 

  • O648