Carbon Nanofiber/3D Nanoporous Silicon Hybrids as High Capacity Lithium Storage Materials
- Authors
- Park, Hyeong-Il; Sohn, Myungbeom; Kim, Dae Sik; Park, Cheolho; Choi, Jeong-Hee; Kim, Hansu
- Issue Date
- Apr-2016
- Publisher
- WILEY-V C H VERLAG GMBH
- Keywords
- batteries; carbon; hybrids; nanofibers; silicon
- Citation
- CHEMSUSCHEM, v.9, no.8, pp.834 - 840
- Indexed
- SCIE
SCOPUS
- Journal Title
- CHEMSUSCHEM
- Volume
- 9
- Number
- 8
- Start Page
- 834
- End Page
- 840
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/5634
- DOI
- 10.1002/cssc.201501633
- ISSN
- 1864-5631
- Abstract
- Carbon nanofiber (CNF)/3D nanoporous (3DNP) Si hybrid materials were prepared by chemical etching of melt-spun Si/Al–Cu–Fe alloy nanocomposites, followed by carbonization using a pitch. CNFs were successfully grown on the surface of 3DNP Si particles using residual Fe impurities after acidic etching, which acted as a catalyst for the growth of CNFs. The resulting CNF/3DNP Si hybrid materials showed an enhanced cycle performance up to 100 cycles compared to that of the pristine Si/Al–Cu–Fe alloy nanocomposite as well as that of bare 3DNP Si particles. These results indicate that CNFs and the carbon coating layer have a beneficial effect on the capacity retention characteristics of 3DNP Si particles by providing continuous electron-conduction pathways in the electrode during cycling. The approach presented here provides another way to improve the electrochemical performances of porous Si-based high capacity anode materials for lithium-ion batteries.
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