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Title: One-pot synthesis of carbon-coated VO2(B) nanobelts for high-rate lithium storage
Authors: Lim, Tuti Mariana
Rui, Xianhong
Sim, Daohao
Xu, Chen
Liu, Weiling
Tan, Huiteng
Wong, Kangming
Hng, Huey Hoon
Yan, Qingyu
Issue Date: 2012
Source: Rui, X., Sim, D., Xu, C., Liu, W., Tan, H., Wong, K., et al. (2012). One-pot synthesis of carbon-coated VO2(B) nanobelts for high-rate lithium storage. RSC Advances, 2(3), 1174-1180.
Series/Report no.: RSC advances
Abstract: Uniform carbon-coated single crystalline vanadium dioxide (VO2(B)@C) nanobelts were successfully prepared by using a facile one-pot hydrothermal approach. Sucrose plays a dual role in this hydrothermal process, namely as a carbon precursor for the carbon shell and, as a reductant to reduce V2O5 to VO2(B). The thickness of the carbon coating layer is tunable from 3.0 to 6.9 nm by changing the ratio of the precursors. Although a high carbon content can improve the electrical conductivity of VO2(B)@C nanobelts, a thick carbon coating layer would block the lithium ion diffusion. The optimal thickness is found to be 4.3 nm (carbon content: 6.6 wt%), where the cathode displays superior performance with highly reversible specific capacities, good cycling stabilities and excellent rate capabilities (e.g. 100 mA h g−1 at 12.4 C).
ISSN: 2046-2069
DOI: 10.1039/c1ra00698c
Rights: © 2012 The Royal Society of Chemistry.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:CEE Journal Articles
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