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Facile conductive bridges formed between silicon nanoparticles inside hollow carbon nanofibers.
- Source :
-
Nanoscale [Nanoscale] 2013 Jun 07; Vol. 5 (11), pp. 4790-6. Date of Electronic Publication: 2013 Apr 23. - Publication Year :
- 2013
-
Abstract
- This paper reports on a simple and effective method for improving the electrochemical performance of silicon nanoparticle-core/carbon-shell (Si-core/C-shell) nanofibers. Instead of increasing the encapsulation amount of Si nanoparticles, additional conductive paths between the Si nanoparticles were formed by incorporating a small percentage of multi-walled carbon nanotubes (MWNTs) (e.g., 5 wt% with respect to Si) into the Si nanoparticle core. The electrical conductivity of a single Si-core/C-shell nanofiber was measured by a four-point probe using four nano-manipulators, which showed a more than five times increase according to MWNT addition. A galvanostatic charge-discharge test demonstrated that a small amount of MWNTs greatly improved the electrochemical performance of the Si-core/C-shell nanofibers (e.g., a 25.1% increase in the Li-ion storage capability) due to the enhanced participation of Si through the additional conductive paths formed between the Si nanoparticles.
Details
- Language :
- English
- ISSN :
- 2040-3372
- Volume :
- 5
- Issue :
- 11
- Database :
- MEDLINE
- Journal :
- Nanoscale
- Publication Type :
- Academic Journal
- Accession number :
- 23613144
- Full Text :
- https://doi.org/10.1039/c3nr00982c