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.
| Original language | English |
|---|---|
| Pages (from-to) | 1-6 |
| Number of pages | 6 |
| Journal | Electrochimica Acta |
| Volume | 127 |
| DOIs | |
| Publication status | Published - 2014 May 1 |
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Keywords
- Cr
- Diamond-like carbon
- Double layer
- Lithium-ion battery
- Silicon monoxide
ASJC Scopus subject areas
- Electrochemistry
- Chemical Engineering(all)
Cite this
Electrochemical characteristics of diamond-like carbon/Cr double-layer coating on silicon monoxide-graphite composite anode for Li-Ion batteries. / Lee, Jun Kyu; Lee, Jae Ha; Kim, Bok Ki; Yoon, Wooyoung.
In: Electrochimica Acta, Vol. 127, 01.05.2014, p. 1-6.Research output: Contribution to journal › Article
}
TY - JOUR
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, Wooyoung
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
UR - http://www.scopus.com/inward/record.url?scp=84897705306&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84897705306&partnerID=8YFLogxK
U2 - 10.1016/j.electacta.2014.01.166
DO - 10.1016/j.electacta.2014.01.166
M3 - Article
AN - SCOPUS:84897705306
VL - 127
SP - 1
EP - 6
JO - Electrochimica Acta
JF - Electrochimica Acta
SN - 0013-4686
ER -