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Title: Investigations of Si Thin Films as Anode of Lithium-Ion Batteries

Abstract

Amorphous silicon thin films having various thicknesses were investigated as a negative electrode material for lithium-ion batteries. Electrochemical characterization of the 20 nm thick thin silicon film revealed a very low first cycle Coulombic efficiency, which can be attributed to the silicon oxide layer formed on both the surface of the as-deposited Si thin film and the interface between the Si and the substrate. Among the investigated films, the 100 nm Si thin film demonstrated the best performance in terms of first cycle efficiency and cycle life. Observations from scanning electron microscopy demonstrated that the generation of cracks was inevitable in the cycled Si thin films, even as the thickness of the film was as little as 20 nm, which was not predicted by previous modeling work. However, the cycling performance of the 20 and 100 nm silicon thin films was not detrimentally affected by these cracks. The poor capacity retention of the 1 mu m silicon thin film was attributed to the delamination.

Authors:
ORCiD logo [1]; ; ORCiD logo; ; ; ORCiD logo; ; ORCiD logo
  1. Department of Chemical and Paper Engineering, Western Michigan University, 4601 Campus Drive, Kalamazoo, Michigan 49008-5462, United States
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
OSTI Identifier:
1426216
DOE Contract Number:
AC02-06CH11357
Resource Type:
Journal Article
Resource Relation:
Journal Name: ACS Applied Materials and Interfaces; Journal Volume: 10; Journal Issue: 4
Country of Publication:
United States
Language:
English

Citation Formats

Wu, Qingliu, Shi, Bing, Bareño, Javier, Liu, Yuzi, Maroni, Victor A., Zhai, Dengyun, Dees, Dennis W., and Lu, Wenquan. Investigations of Si Thin Films as Anode of Lithium-Ion Batteries. United States: N. p., 2018. Web. doi:10.1021/acsami.7b13980.
Wu, Qingliu, Shi, Bing, Bareño, Javier, Liu, Yuzi, Maroni, Victor A., Zhai, Dengyun, Dees, Dennis W., & Lu, Wenquan. Investigations of Si Thin Films as Anode of Lithium-Ion Batteries. United States. doi:10.1021/acsami.7b13980.
Wu, Qingliu, Shi, Bing, Bareño, Javier, Liu, Yuzi, Maroni, Victor A., Zhai, Dengyun, Dees, Dennis W., and Lu, Wenquan. Mon . "Investigations of Si Thin Films as Anode of Lithium-Ion Batteries". United States. doi:10.1021/acsami.7b13980.
@article{osti_1426216,
title = {Investigations of Si Thin Films as Anode of Lithium-Ion Batteries},
author = {Wu, Qingliu and Shi, Bing and Bareño, Javier and Liu, Yuzi and Maroni, Victor A. and Zhai, Dengyun and Dees, Dennis W. and Lu, Wenquan},
abstractNote = {Amorphous silicon thin films having various thicknesses were investigated as a negative electrode material for lithium-ion batteries. Electrochemical characterization of the 20 nm thick thin silicon film revealed a very low first cycle Coulombic efficiency, which can be attributed to the silicon oxide layer formed on both the surface of the as-deposited Si thin film and the interface between the Si and the substrate. Among the investigated films, the 100 nm Si thin film demonstrated the best performance in terms of first cycle efficiency and cycle life. Observations from scanning electron microscopy demonstrated that the generation of cracks was inevitable in the cycled Si thin films, even as the thickness of the film was as little as 20 nm, which was not predicted by previous modeling work. However, the cycling performance of the 20 and 100 nm silicon thin films was not detrimentally affected by these cracks. The poor capacity retention of the 1 mu m silicon thin film was attributed to the delamination.},
doi = {10.1021/acsami.7b13980},
journal = {ACS Applied Materials and Interfaces},
number = 4,
volume = 10,
place = {United States},
year = {Mon Jan 22 00:00:00 EST 2018},
month = {Mon Jan 22 00:00:00 EST 2018}
}