Rate performance enhancement of anode for lithium-ion battery via composition of hard carbon and silicon-carbon nanofiber

Tae Hwan Park, Jae Seong Yeo, Yuzo Ohata, Min Hyun Seo, Jin Miyawaki, Isao Mochida, Seong Ho Yoon

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)249-256
Number of pages8
JournalInternational Journal of Electrochemical Science
Volume8
Issue number1
Publication statusPublished - Jan 1 2013

All Science Journal Classification (ASJC) codes

  • Electrochemistry

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