TY - JOUR
T1 - Designing self-standing silicon-copper composite helices as anodes for lithium ion batteries
AU - Polat, B. D.
AU - Keles, O.
N1 - Publisher Copyright:
© 2016 Elsevier B.V. All rights reserved.
PY - 2016/8/25
Y1 - 2016/8/25
N2 - In this study, we have fabricated helical thin films to be used as an anode material in lithium ion batteries (LIB). The thin films having various Cu-Si atomic ratios (30-70%, 20-80%, and 10-90%) are prepared by using ion-assisted glancing angle co-deposition. Cu plays a crucial role in holding the electrode together, minimizing overall capacity loss and enabling faster electron transfer thus, improving the electrochemical performances of the electrodes. Increasing the Cu/Si atomic ratio affects the structure of the helices and their alignment. Implementing ion assisted deposition at the beginning of the film deposition helps to improve film adhesion. The Si-20 at.% Cu anode delivers 1885 mAh g-1 initially with 98% coulombic efficiency and retains 77% of the capacity after 100 cycles at 100 mA g-1.
AB - In this study, we have fabricated helical thin films to be used as an anode material in lithium ion batteries (LIB). The thin films having various Cu-Si atomic ratios (30-70%, 20-80%, and 10-90%) are prepared by using ion-assisted glancing angle co-deposition. Cu plays a crucial role in holding the electrode together, minimizing overall capacity loss and enabling faster electron transfer thus, improving the electrochemical performances of the electrodes. Increasing the Cu/Si atomic ratio affects the structure of the helices and their alignment. Implementing ion assisted deposition at the beginning of the film deposition helps to improve film adhesion. The Si-20 at.% Cu anode delivers 1885 mAh g-1 initially with 98% coulombic efficiency and retains 77% of the capacity after 100 cycles at 100 mA g-1.
KW - Glancing angle deposition
KW - Lithium ion batteries
KW - Si anodes thin film
KW - SiCu composite negative electrode
KW - Structured thin film electrodes
UR - http://www.scopus.com/inward/record.url?scp=84962826144&partnerID=8YFLogxK
U2 - 10.1016/j.jallcom.2016.03.125
DO - 10.1016/j.jallcom.2016.03.125
M3 - Article
AN - SCOPUS:84962826144
SN - 0925-8388
VL - 677
SP - 228
EP - 236
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
ER -