Electrochemical characteristics of silver- And nickel-coated synthetic graphite prepared by a gas suspension spray coating method for the anode of lithium secondary batteries

Won Chang Choi; Dongjin Byun; Joong Kee Lee; Byung Won Cho

doi:10.1016/j.electacta.2003.12.070

Electrochemical characteristics of silver- And nickel-coated synthetic graphite prepared by a gas suspension spray coating method for the anode of lithium secondary batteries

Won Chang Choi, Dongjin Byun, Joong Kee Lee, Byung Won Cho

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

31 Citations (Scopus)

Abstract

Four kinds of synthetic graphite coated with silver and nickel for the anodes of lithium secondary batteries were prepared by a gas suspension spray coating method. The electrode coated with silver showed higher charge-discharge capacities due to a Ag-Li alloy, but rate capability decreased at higher charge-discharge rate. This result can be explained by the formation of an artificial Ag oxidation film with higher impedance, this lowered the rate capability at high charge-discharge rate due to its low electrical conductivity. Rate capability is improved, however, by coating nickel and silver together on the surface of synthetic graphite. The nickel which is inactive with oxidation reaction plays an important role as a conducting agent which enhanced the conductivity of the electrode.

Original language	English
Pages (from-to)	523-529
Number of pages	7
Journal	Electrochimica Acta
Volume	50
Issue number	2-3 SPEC. ISS.
DOIs	https://doi.org/10.1016/j.electacta.2003.12.070
Publication status	Published - 2004 Nov 30

Keywords

Gas suspension spray coating
Lithium secondary batteries
Nickel
Silver
Synthetic graphite (MCMB)

ASJC Scopus subject areas

Chemical Engineering(all)
Electrochemistry

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10.1016/j.electacta.2003.12.070

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Electrochemical characteristics of silver- And nickel-coated synthetic graphite prepared by a gas suspension spray coating method for the anode of lithium secondary batteries. / Choi, Won Chang; Byun, Dongjin; Lee, Joong Kee et al.
In: Electrochimica Acta, Vol. 50, No. 2-3 SPEC. ISS., 30.11.2004, p. 523-529.

Research output: Contribution to journal › Article › peer-review

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title = "Electrochemical characteristics of silver- And nickel-coated synthetic graphite prepared by a gas suspension spray coating method for the anode of lithium secondary batteries",

abstract = "Four kinds of synthetic graphite coated with silver and nickel for the anodes of lithium secondary batteries were prepared by a gas suspension spray coating method. The electrode coated with silver showed higher charge-discharge capacities due to a Ag-Li alloy, but rate capability decreased at higher charge-discharge rate. This result can be explained by the formation of an artificial Ag oxidation film with higher impedance, this lowered the rate capability at high charge-discharge rate due to its low electrical conductivity. Rate capability is improved, however, by coating nickel and silver together on the surface of synthetic graphite. The nickel which is inactive with oxidation reaction plays an important role as a conducting agent which enhanced the conductivity of the electrode.",

keywords = "Gas suspension spray coating, Lithium secondary batteries, Nickel, Silver, Synthetic graphite (MCMB)",

author = "Choi, {Won Chang} and Dongjin Byun and Lee, {Joong Kee} and Cho, {Byung Won}",

note = "Funding Information: The authors would like to thank professor P.L. Silveston for his review of the manuscript. This research was performed with the financial support of the Center for Nanostructured Materials Technology under the 21st Century Frontier R&D Program of the Ministry of Science and Technology, Korea. Copyright: Copyright 2008 Elsevier B.V., All rights reserved.",

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AU - Choi, Won Chang

AU - Byun, Dongjin

AU - Lee, Joong Kee

AU - Cho, Byung Won

N1 - Funding Information: The authors would like to thank professor P.L. Silveston for his review of the manuscript. This research was performed with the financial support of the Center for Nanostructured Materials Technology under the 21st Century Frontier R&D Program of the Ministry of Science and Technology, Korea. Copyright: Copyright 2008 Elsevier B.V., All rights reserved.

PY - 2004/11/30

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N2 - Four kinds of synthetic graphite coated with silver and nickel for the anodes of lithium secondary batteries were prepared by a gas suspension spray coating method. The electrode coated with silver showed higher charge-discharge capacities due to a Ag-Li alloy, but rate capability decreased at higher charge-discharge rate. This result can be explained by the formation of an artificial Ag oxidation film with higher impedance, this lowered the rate capability at high charge-discharge rate due to its low electrical conductivity. Rate capability is improved, however, by coating nickel and silver together on the surface of synthetic graphite. The nickel which is inactive with oxidation reaction plays an important role as a conducting agent which enhanced the conductivity of the electrode.

AB - Four kinds of synthetic graphite coated with silver and nickel for the anodes of lithium secondary batteries were prepared by a gas suspension spray coating method. The electrode coated with silver showed higher charge-discharge capacities due to a Ag-Li alloy, but rate capability decreased at higher charge-discharge rate. This result can be explained by the formation of an artificial Ag oxidation film with higher impedance, this lowered the rate capability at high charge-discharge rate due to its low electrical conductivity. Rate capability is improved, however, by coating nickel and silver together on the surface of synthetic graphite. The nickel which is inactive with oxidation reaction plays an important role as a conducting agent which enhanced the conductivity of the electrode.

KW - Gas suspension spray coating

KW - Lithium secondary batteries

KW - Nickel

KW - Silver

KW - Synthetic graphite (MCMB)

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Electrochemical characteristics of silver- And nickel-coated synthetic graphite prepared by a gas suspension spray coating method for the anode of lithium secondary batteries

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Keywords

ASJC Scopus subject areas

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