Electrochemical Insertion/extraction of Lithium in Multiwall Carbon Nanotube/Sb and SnSb₀.₅ Nanocomposites
Name
MEBCS010.pdf
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621.08 KB
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Adobe PDF
Checksum (MD5)
eb8478bbc2a4befbc7fa32847919e1e2
Author(s)
Chen, Wei Xiang
Lee, Jim Yang
Liu, Zhaolin
Date Issued
January 2003
Series/Report no.
Molecular Engineering of Biological and Chemical Systems (MEBCS);
Abstract
Multiwall carbon nanotubes (CNTs) were synthesized by catalytic chemical vapor deposition of acetylene and used as templates to prepare CNT-Sb and CNT-SnSb₀.₅ nanocomposites via the chemical reduction of SnCl₂ and SbCl₃ precursors. SEM and TEM imagings show that the Sb and SnSb₀.₅ particles were uniformly dispersed in the CNT web and on the outside surface of CNTs. These CNT-metal composites are active anode materials for lithium ion batteries, showing improved cyclability compared to unsupported Sb and SnSb particles; and higher reversible specific capacities than CNTs. The improvement in cyclability may be attributed to the nanoscale dimensions of the metal particles and CNT’s role as a buffer in containing the mechanical stress arising from the volume changes in electrochemical lithium insertion and extraction reactions.
Subjects
carbon nanotubes
SnSb alloy
composite
anode materials
Li-ion batteries
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