Improving microstructure of silicon/carbon nanofiber composites as a Li battery anode

Jane Y. Howe, David J. Burton, Yue Qi, Harry M. Meyer, Maryam Nazri, G. Abbas Nazri, Andrew C. Palmer, Patrick D. Lake

Research output: Contribution to journalArticle

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Abstract

We report the interfacial study of a silicon/carbon nanofiber (Si/CNF) nanocomposite material as a potentially high performance anode for rechargeable lithium ion batteries. The carbon nanofiber is hollow, with a graphitic interior and turbostratic exterior. Amorphous silicon layers were uniformly coated via chemical vapor deposition on both the exterior and interior surfaces of the CNF. The resulting Si/CNF composites were tested as anodes for Li ion batteries and exhibited capacities near 800 mAh g -1 for 100 cycles. After cycling, we found that more Si had fallen off from the outer wall than from the inner wall of CNF. Theoretical calculations confirmed that this is due to a higher interfacial strength at the Si/C-edge interface at the inner wall than that of the Si/C-basal interface at the outer wall. Based upon the experimental analysis and theoretical calculation, we have proposed several interfacial engineering approaches to improve the performance of the electrodes by optimizing the microstructure of this nanocomposite.

Original languageEnglish (US)
Pages (from-to)455-461
Number of pages7
JournalJournal of Power Sources
Volume221
DOIs
StatePublished - Jan 1 2013
Externally publishedYes

Profile

carbon
Carbon nanofibers
electric batteries
anodes
silicon
Autopsy
Anodes
Silicon
nanocomposites
microstructure
cycles
composite materials
ions
Directed Tissue Donation
Laryngeal Mucosa
Community Psychiatry
Microstructure
Composite materials
Nanocomposites
Lithium-ion batteries

Keywords

  • Anode
  • Lithium-ion batteries
  • Nanomaterial
  • Silicon-carbon composite

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Energy Engineering and Power Technology
  • Renewable Energy, Sustainability and the Environment
  • Physical and Theoretical Chemistry

Cite this

Howe, J. Y., Burton, D. J., Qi, Y., Meyer, H. M., Nazri, M., Nazri, G. A., ... Lake, P. D. (2013). Improving microstructure of silicon/carbon nanofiber composites as a Li battery anode. Journal of Power Sources, 221, 455-461. DOI: 10.1016/j.jpowsour.2012.08.026

Improving microstructure of silicon/carbon nanofiber composites as a Li battery anode. / Howe, Jane Y.; Burton, David J.; Qi, Yue; Meyer, Harry M.; Nazri, Maryam; Nazri, G. Abbas; Palmer, Andrew C.; Lake, Patrick D.

In: Journal of Power Sources, Vol. 221, 01.01.2013, p. 455-461.

Research output: Contribution to journalArticle

Howe, JY, Burton, DJ, Qi, Y, Meyer, HM, Nazri, M, Nazri, GA, Palmer, AC & Lake, PD 2013, 'Improving microstructure of silicon/carbon nanofiber composites as a Li battery anode' Journal of Power Sources, vol 221, pp. 455-461. DOI: 10.1016/j.jpowsour.2012.08.026
Howe JY, Burton DJ, Qi Y, Meyer HM, Nazri M, Nazri GA et al. Improving microstructure of silicon/carbon nanofiber composites as a Li battery anode. Journal of Power Sources. 2013 Jan 1;221:455-461. Available from, DOI: 10.1016/j.jpowsour.2012.08.026

Howe, Jane Y.; Burton, David J.; Qi, Yue; Meyer, Harry M.; Nazri, Maryam; Nazri, G. Abbas; Palmer, Andrew C.; Lake, Patrick D. / Improving microstructure of silicon/carbon nanofiber composites as a Li battery anode.

In: Journal of Power Sources, Vol. 221, 01.01.2013, p. 455-461.

Research output: Contribution to journalArticle

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