Electrospun Titanium Dioxide and Silicon Composite Nanofibers for Advanced Lithium Ion Batteries

<p>A unique electrospinning method was implemented to fabricate composite nanofibers for lithium ion battery applications. The composite nanofibers were made of amorphous carbon, rutile phase TiO₂, and cubic phase Si nanoparticles. Sulfur was utilized as a template to form void structures within the TiO₂ nanofiber matrix. This provides the desired space for the Si expansion during the lithiation process. Phase, structure, composition, and morphology of the nanofibers were characterized using Raman spectroscopy, SEM, EDS, TGA, and powder XRD. Carbonized TiO₂ nanofibers showed a low but stable specific capacity. Si Nanoparticles demonstrated an initially high but fast degrading capacity. In contrast, silicon in SiNP/C/TiO₂ nanofibers with sulfur as a template exhibits an impressive high specific capacity of ~3459 mAh g^-1initially, 54% of which can be maintained after 180 cycles.</p>

Name thesis:degree_name

Master of Science in Applied Physical Science (M.S.)

Level thesis:degree_level

Thesis (open access)

Discipline thesis:degree_discipline

Department of Electrical Engineering

Year dc:date.available

2015

Author dc:creator

• McCormac, Kathleen

Contributors dc:contributor

• Rafael Quirino
• John Stone

• Lithium Ion Batteries
• Titanium Dioxide
• Silicon
• Nanofiber
• Materials Chemistry

Repository record dc:identifier

https://digitalcommons.georgiasouthern.edu/etd/1228

OAI identifier oai:identifier

oai:digitalcommons.georgiasouthern.edu:etd-2298