Designing self-standing silicon-copper composite helices as anodes for lithium ion batteries

B. D. Polat*, O. Keles

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22 Atıf (Scopus)

Özet

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.

Orijinal dilİngilizce
Sayfa (başlangıç-bitiş)228-236
Sayfa sayısı9
DergiJournal of Alloys and Compounds
Hacim677
DOI'lar
Yayın durumuYayınlandı - 25 Ağu 2016

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Publisher Copyright:
© 2016 Elsevier B.V. All rights reserved.

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