Electrochemical characteristics of graphite coated with tin-oxide and copper by fluidised-bed chemical vapour deposition

Authors
Lee, Joong KeeRyu, DHJu, JBShul, YGCho, BWPark, D
Issue Date
2002-04-20
Publisher
ELSEVIER SCIENCE BV
Citation
JOURNAL OF POWER SOURCES, v.107, no.1, pp.90 - 97
Abstract
Anodes for a lithium secondary battery are prepared with synthetic graphite (meso-phase carbonaceous microbead: MCMB) which-is coated with tin-oxide and copper by fluidised-bed chemical vapour deposition (FCVD). In the present study, three different samples was prepared, and their electrochemical characteristics are examined by using X-ray diffraction, electrochemical voltage spectroscopy (EVS), scanning electron micrography, ac impedance measurements, and galvanostatic charge-discharge experiments. The electrode coated with tinoxide gives higher capacity than uncoated MCMB, but the capacity decreases with cycling. This is probably due to severe volume changes. The cycleability is improved, however, by coating copper on the surface of the carbonaceous material coated with tin-oxide. The copper plays an important role as an inactive matrix which provides a buffer against volume changes. (C) 2002 Elsevier Science B.V. All rights reserved.
Keywords
LITHIUM INTERCALATION; BATTERIES; ELECTRODES; LITHIUM INTERCALATION; BATTERIES; ELECTRODES; lithium secondary batteries; synthetic graphite (MCMB); tin-oxide; copper coating; fluidised-bed; chemical vapour deposition
ISSN
0378-7753
URI
https://pubs.kist.re.kr/handle/201004/139596
Appears in Collections:
KIST Article > 2002
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