DOI QR코드

DOI QR Code

Synthesis and Characterization of Hollow Silicon-Carbon Composites as a Lithium Battery Anode Material

  • Han, Won-Kyu (Division of Materials Science and Engineering, Hanyang University) ;
  • Ko, Yong-Nam (Division of Materials Science and Engineering, Hanyang University) ;
  • Yoon, Chong-Seung (Division of Materials Science and Engineering, Hanyang University) ;
  • Choa, Yong-Ho (Department of Fine Chemical Engineering, Hanyang University) ;
  • Oh, Sung-Tag (Department of Materials Science and Engineering, Seoul National University of Technology) ;
  • Kang, Sung-Goon (Division of Materials Science and Engineering, Hanyang University)
  • 발행 : 2009.10.27

초록

Si-C composite with hollow spherical structure was synthesized using ultrasonic treatment of organosilica powder formed by hydrolysis of phenyltrimethoxysilane. The prepared powder was pyrolyzed at various temperatures ranging from 900 to 1300 $^{\circ}C$ under nitrogen atmosphere to obtain optimum conditions for Li-ion battery anode materials with high capacity and cyclability. The XRD and elemental analysis results show that the pyrolyzed Si/C composite at 1100 $^{\circ}C$ has low oxygen and nitrogen levels, which is desirable for increasing the electrochemical capacity and reducing the irreversible capacity of the first discharge. The solid Si-C composite electrode shows a first charge capacity of $\sim$500 mAhg$^{-1}$ and a capacity fade within 30 cycles of 0.93% per cycle. On the other hand, the electrochemical performance of the hollow Si-C composite electrode exhibits a reversible charge capacity of $\sim$540 mAhg$^{-1}$ with an excellent capacity retention of capacity loss 0.43% per cycle up to 30 cycles. The improved electrochemical properties are attributed to facile diffusion of Li ions into the hollow shell with nanoscale thickness. In addition, the empty core space provides a buffer zone to relieve the mechanical stresses incurred during Li insertion.

키워드

참고문헌

  1. B. A. Johnson and R. E. White, J. Power Sources, 70, 48 (1998). https://doi.org/10.1016/S0378-7753(97)02659-1
  2. J. Yang, M. Winter and J. O. Besenhard, Solid State Ionics, 90, 281 (1996). https://doi.org/10.1016/S0167-2738(96)00389-X
  3. J. O. Besenhard, J. Yang and M. Winter, J. Power Sources, 68, 87 (1997). https://doi.org/10.1016/S0378-7753(96)02547-5
  4. W. K. Han, Y. H. Choa, S. T. Cho and S. G. Kang, Kor. J. Mater. Res., 18(4), 187 (2008). https://doi.org/10.3740/MRSK.2008.18.4.187
  5. R. A. Sharma and R. N. Seefurth, J. Electrochem. Soc., 123, 1763 (1976). https://doi.org/10.1149/1.2132692
  6. Y. Zheng, J. Yang, J. Wang and Y. NuLi, Electrochim. Acta, 52, 5863 (2007). https://doi.org/10.1016/j.electacta.2007.03.013
  7. K. Hanai, Y. Liu, N. Imanishi, A. Hirano, M. Matsumura, T. Ichikawa and Y. Takeda, J. Power Sources, 146, 156 (2005). https://doi.org/10.1016/j.jpowsour.2005.03.108
  8. H. Li, X. Huang, L. Chen, Z. Wu and Y. Liang, Electrochem. Solid-State Lett., 7, 547 (1997).
  9. Y. Wang, F. Su, J. Y. Lee and X. S. Zhao, Chem. Mater., 18, 1347 (2006). https://doi.org/10.1021/cm052219o
  10. S. G. Han, B. C. Jang, T. A. Kim, S. M. Oh and T. H. Hyeon, Adv. Funct. Mater., 15, 1845 (2005). https://doi.org/10.1002/adfm.200500243
  11. H. J. Hah, J. S. Kim, B. J. Jeon, S. M. Koo and Y. E. Lee, Chem. Commun., 14, 1712 (2003). https://doi.org/10.1039/b301521a
  12. M. J. Wang and H. Wada, J. Mater. Sci., 25, 1690 (1990). https://doi.org/10.1007/BF01045372
  13. H. Wang and G. S. Fischman, J. Am. Ceram. Soc., 74(1), 1519 (1991). https://doi.org/10.1111/j.1151-2916.1991.tb07134.x
  14. A. M. Wilson, G. Zank, K. Egushi, W. Xing and J. R. Dahn, J. Power Sources, 68, 195 (1997). https://doi.org/10.1016/S0378-7753(96)02551-7
  15. M. Martin-Gil, M. E. Rabanal, A. Varez, A. Kuhn and F. Garcia-Alvarado, Mater. Lett., 57, 3063 (2003). https://doi.org/10.1016/S0167-577X(02)01437-4
  16. M. H. Chen, Z. C. Huang, G. T. Wu, G. M. Zhu, J. K. You and Z. G. Lin, Mater. Res. Bull., 38, 831 (2003). https://doi.org/10.1016/S0025-5408(03)00063-1
  17. Y. Wang and J. Y. Lee, J. Power Sources, 144, 220 (2005). https://doi.org/10.1016/j.jpowsour.2004.12.016
  18. K. T. Lee, J. C. Lytle, N. S. Ergang, S. M. Oh and A. Stein, Adv. Funct. Mater., 15, 547 (2005). https://doi.org/10.1002/adfm.200400186