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Interfacial Properties of the a-Si∕Cu:Active–Inactive Thin-Film Anode System for Lithium-Ion Batteries

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Maranchi, J. P., Hepp, A. F., Evans, A. G., Nuhfer, N. T., Kumta, P. N.·2006·Journal of The Electrochemical Society

Abstract

Amorphous silicon thin films deposited on copper foil have been observed to exhibit near theoretical capacity for a limited number of cycles. The films, however, eventually delaminate, leading to failure of the anode. In order to better understand the mechanism of capacity retention and the ultimate failure mode of a model brittle active:elastic/plastic inactive anode system, the films were subjected to in situ adhesion tests while observing the film surface using scanning electron microscopy. Atomic force and transmission electron microscopy, and electrochemical cycling were conducted to analyze the emerging morphology of the films during cycling. The adhesion of the as-deposited Si film to the Cu substrate was measured to , reflecting a weak interface adhesion strength. Plastic deformation of the underlying Cu substrate combined with a ratcheting mechanism is proposed to occur in the system, with delamination failure mode occurring only after the formation of an interface imperfection. From the analysis of slow rate cycling experiments, nucleation of a lithium compound based on the interdiffusion of Si and Cu is identified as the most probable cause of the ultimate delamination failure of the deposited film.

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Metadata

Authors
Maranchi, J. P., Hepp, A. F., Evans, A. G., Nuhfer, N. T., & Kumta, P. N.
Venue
Journal of The Electrochemical Society
Published
2006
Volume
153
Issue
6
Pages
A1246
ISSN
0013-4651 (ISSN-L)
OpenAlex
W1996689450
Cited by
296
References
10
FWCI
2.36
Type
journal article
Language
en
Open access
bronze

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CoChat. (2026). Citation check: Interfacial Properties of the a-Si∕Cu:Active–Inactive Thin-Film Anode System for Lithium-Ion Batteries. https://app.cochat.ai/papers/10.1149/1.2184753
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Maranchi, J. P., Hepp, A. F., Evans, A. G., Nuhfer, N. T., & Kumta, P. N. (2006). Interfacial Properties of the a-Si∕Cu:Active–Inactive Thin-Film Anode System for Lithium-Ion Batteries. Journal of The Electrochemical Society. https://doi.org/10.1149/1.2184753

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