Electrochemical characteristics of diamond-like carbon/Cr double-layer coating on silicon monoxide-graphite composite anode for Li-Ion batteries

Jun Kyu Lee; Jae Ha Lee; Bok Ki Kim; Woo Young Yoon

doi:10.1016/j.electacta.2014.01.166

Electrochemical characteristics of diamond-like carbon/Cr double-layer coating on silicon monoxide-graphite composite anode for Li-Ion batteries

Jun Kyu Lee, Jae Ha Lee, Bok Ki Kim, Woo Young Yoon

Department of Materials Science and Engineering

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

9 Citations (Scopus)

Abstract

The electrochemical behavior of a SiO_x-graphite composite anode with a diamond-like carbon (DLC)-Cr double-layer coating and employed in a Li-ion secondary cell was studied to determine whether the coating improved the electrochemical characteristics of SiO_x. The DLC layer was coated through plasma-enhanced chemical vapor deposition, and the Cr layer was formed by physical vapor deposition. The formation of the coating layer was confirmed by transmission electron microscopy, Raman spectroscopy, and electron microprobe analysis. The charge capacity of a coated-anode cell (591 mA·h· g^-1) was found to be higher than that of a bare-anode cell (517 mA·h·g^-1) after the 1st cycle. Further, the 50th-cycle capacity retention of the coated-anode cell (83%) was higher than that of the bare-anode cell (59%) at a 0.5 C-rate. The electrochemical characteristics of the coated-anode cell were investigated by impedance analysis, energy-dispersive X-ray spectroscopy, and scanning electron microscopy. Because of good mechanical properties of the DLC-Cr coatings and high electrical conductivity of Cr, double layer coating enhances the electrochemical behavior of SiO _x as a supplementary coating material.

Original language	English
Pages (from-to)	1-6
Number of pages	6
Journal	Electrochimica Acta
Volume	127
DOIs	https://doi.org/10.1016/j.electacta.2014.01.166
Publication status	Published - 2014 May 1

Keywords

Cr
Diamond-like carbon
Double layer
Lithium-ion battery
Silicon monoxide

ASJC Scopus subject areas

Chemical Engineering(all)
Electrochemistry

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@article{9a4707f84d124bb1b8f28ac98d6d2620,

title = "Electrochemical characteristics of diamond-like carbon/Cr double-layer coating on silicon monoxide-graphite composite anode for Li-Ion batteries",

abstract = "The electrochemical behavior of a SiOx-graphite composite anode with a diamond-like carbon (DLC)-Cr double-layer coating and employed in a Li-ion secondary cell was studied to determine whether the coating improved the electrochemical characteristics of SiOx. The DLC layer was coated through plasma-enhanced chemical vapor deposition, and the Cr layer was formed by physical vapor deposition. The formation of the coating layer was confirmed by transmission electron microscopy, Raman spectroscopy, and electron microprobe analysis. The charge capacity of a coated-anode cell (591 mA·h· g-1) was found to be higher than that of a bare-anode cell (517 mA·h·g-1) after the 1st cycle. Further, the 50th-cycle capacity retention of the coated-anode cell (83%) was higher than that of the bare-anode cell (59%) at a 0.5 C-rate. The electrochemical characteristics of the coated-anode cell were investigated by impedance analysis, energy-dispersive X-ray spectroscopy, and scanning electron microscopy. Because of good mechanical properties of the DLC-Cr coatings and high electrical conductivity of Cr, double layer coating enhances the electrochemical behavior of SiO x as a supplementary coating material.",

keywords = "Cr, Diamond-like carbon, Double layer, Lithium-ion battery, Silicon monoxide",

author = "Lee, {Jun Kyu} and Lee, {Jae Ha} and Kim, {Bok Ki} and Yoon, {Woo Young}",

note = "Funding Information: This study was supported by a National Research Foundation (NRF) of Korea grant (2011-0028757) funded by the Ministry of Education, Science, and Technology (MEST) of the Korean government. A transmission electron microscope located at the Korea Basic Science Institute, Seoul Center, was used for observing the microstructures of samples. ",

year = "2014",

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doi = "10.1016/j.electacta.2014.01.166",

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T1 - Electrochemical characteristics of diamond-like carbon/Cr double-layer coating on silicon monoxide-graphite composite anode for Li-Ion batteries

AU - Lee, Jun Kyu

AU - Lee, Jae Ha

AU - Kim, Bok Ki

AU - Yoon, Woo Young

N1 - Funding Information: This study was supported by a National Research Foundation (NRF) of Korea grant (2011-0028757) funded by the Ministry of Education, Science, and Technology (MEST) of the Korean government. A transmission electron microscope located at the Korea Basic Science Institute, Seoul Center, was used for observing the microstructures of samples.

PY - 2014/5/1

Y1 - 2014/5/1

N2 - The electrochemical behavior of a SiOx-graphite composite anode with a diamond-like carbon (DLC)-Cr double-layer coating and employed in a Li-ion secondary cell was studied to determine whether the coating improved the electrochemical characteristics of SiOx. The DLC layer was coated through plasma-enhanced chemical vapor deposition, and the Cr layer was formed by physical vapor deposition. The formation of the coating layer was confirmed by transmission electron microscopy, Raman spectroscopy, and electron microprobe analysis. The charge capacity of a coated-anode cell (591 mA·h· g-1) was found to be higher than that of a bare-anode cell (517 mA·h·g-1) after the 1st cycle. Further, the 50th-cycle capacity retention of the coated-anode cell (83%) was higher than that of the bare-anode cell (59%) at a 0.5 C-rate. The electrochemical characteristics of the coated-anode cell were investigated by impedance analysis, energy-dispersive X-ray spectroscopy, and scanning electron microscopy. Because of good mechanical properties of the DLC-Cr coatings and high electrical conductivity of Cr, double layer coating enhances the electrochemical behavior of SiO x as a supplementary coating material.

AB - The electrochemical behavior of a SiOx-graphite composite anode with a diamond-like carbon (DLC)-Cr double-layer coating and employed in a Li-ion secondary cell was studied to determine whether the coating improved the electrochemical characteristics of SiOx. The DLC layer was coated through plasma-enhanced chemical vapor deposition, and the Cr layer was formed by physical vapor deposition. The formation of the coating layer was confirmed by transmission electron microscopy, Raman spectroscopy, and electron microprobe analysis. The charge capacity of a coated-anode cell (591 mA·h· g-1) was found to be higher than that of a bare-anode cell (517 mA·h·g-1) after the 1st cycle. Further, the 50th-cycle capacity retention of the coated-anode cell (83%) was higher than that of the bare-anode cell (59%) at a 0.5 C-rate. The electrochemical characteristics of the coated-anode cell were investigated by impedance analysis, energy-dispersive X-ray spectroscopy, and scanning electron microscopy. Because of good mechanical properties of the DLC-Cr coatings and high electrical conductivity of Cr, double layer coating enhances the electrochemical behavior of SiO x as a supplementary coating material.

KW - Cr

KW - Diamond-like carbon

KW - Double layer

KW - Lithium-ion battery

KW - Silicon monoxide

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