NDLI: An amorphous Si thin film anode with high capacity and long cycling life for lithium ion batteries

Content Provider	Springer Nature Link
Author	Chen, L. B. Xie, J. Y. Yu, H. C. Wang, T. H.
Copyright Year	2009
Abstract	A Si thin film of thickness 275 nm was deposited on rough Cu foil by magnetron sputtering for use as lithium ion battery anode material. X-ray diffraction (XRD) and TEM analysis revealed that the Si thin film was completely of amorphous structure. The electrochemical performance of the Si thin film was investigated by cyclic voltammetry and constant current charge/discharge test. The film exhibited a high capacity of 3,134 mAh g$^{−1}$ at 0.025 C rate. The capacity retention was 61.3% at 0.5 C rate for 500 cycles. An island structure formed on the Cu foil substrate after cycling adhered to the substrate firmly and provided electrical connection. This is the possible reason for the long cycling life of Si thin film anode. Moreover, the cycling performance was further improved by annealing at 300 °C. The Li$^{+}$ diffusion coefficients (D $_{0}$) of Si thin film, measured by cyclic voltammetry, are 1.47 × 10$^{−9}$ cm$^{2}$ s$^{−1}$ and 2.16 × 10$^{−9}$ cm$^{2}$ s$^{−1}$ for different reduced peaks.
Starting Page	1157
Ending Page	1162
Page Count	6
File Format	PDF
ISSN	0021891X
Journal	Journal of Applied Electrochemistry
Volume Number	39
Issue Number	8
e-ISSN	15728838
Language	English
Publisher	Springer Netherlands
Publisher Date	2009-01-08
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Si thin film Long cycling life Magnetron sputtering Lithium ion battery Anode Industrial Chemistry/Chemical Engineering Physical Chemistry Electrochemistry
Content Type	Text
Resource Type	Article
Subject	Materials Chemistry Chemical Engineering Electrochemistry

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