Journal
JOURNAL OF MATERIALS CHEMISTRY
Volume 19, Issue 28, Pages 4992-4997Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/b903165k
Keywords
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Funding
- U.S. National Science Foundation [0555959, 0833837]
- National Science Foundation [EEC08212121]
- ACS Petroleum Research Fund [47863-G10]
- Directorate For Engineering
- Div Of Chem, Bioeng, Env, & Transp Sys [0833837] Funding Source: National Science Foundation
- Div Of Civil, Mechanical, & Manufact Inn
- Directorate For Engineering [0555959] Funding Source: National Science Foundation
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Si nanoparticle-incorporated polyacrylonitrile (PAN) fibers are prepared using the electrospinning method and Si-filled carbon (C) fibers are obtained by the subsequent heat treatment of these Si/PAN fibers. Their microstructures are characterized by various analytical techniques. It is found that Si nanoparticles are distributed both inside and on the surface of PAN fibers and this is preserved after the formation of Si/C fibers. The crystal structure characterization indicates that, in Si/C fibers, Si nanoparticles exist in a crystalline state while carbon is in a predominantly amorphous or disordered form. Si/C fibers show high reversible capacity and good capacity retention when tested as anodes in lithium ion batteries (LIBs). The excellent electrochemical performance of these fibers can be ascribed to the combined contributions of carbon matrices and Si nanoparticles, and the favorable textures and surface properties of the Si/C fibers.
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