The internal-pore introduced hybridized materials with hard carbon and specially prepared silicon-carbon nanofiber composite have been prepared from mechanical mixing and continuous carbonization processes. The effective additions of 10-30 wt% of silicon-carbon nanofiber composites into hard carbon matrix improved the rate performance as well as discharge capacity very much. The prepared hybridized materials through the 10 and 30 wt% addition of the silicon-carbon nanofiber composites into hard carbons showed the discharge capacity retention rates of over 87.8% and 89.4% even at 3,000 mA g-1 (over 6C) and high discharge capacities of 337 and 441 mAh g-1, respectively. The artificial introduction of the appropriate amounts internal pores into hard carbon matrix with silicon-carbon nanofiber composite can effectively enhance the high rate performance as well as the discharge capacity without compromising the 1st cycle coulombic efficiency.
|Number of pages||8|
|Journal||International Journal of Electrochemical Science|
|Publication status||Published - Jan 1 2013|
All Science Journal Classification (ASJC) codes