Investigation of crack patterns and cyclic performance of Ti-Si nanocomposite thin film anodes for lithium ion batteries

Y. H. Wang; Y. He; R. J. Xiao; H. Li; K. E. Aifantis; X. J. Huang

doi:10.1016/j.jpowsour.2011.11.027

Investigation of crack patterns and cyclic performance of Ti-Si nanocomposite thin film anodes for lithium ion batteries

Y. H. Wang, Y. He, R. J. Xiao, H. Li, K. E. Aifantis, X. J. Huang

Research output: Contribution to journal › Article › peer-review

67 Scopus citations

Abstract

Three different Ti-Si nanocomposite thin films are prepared by the co-sputtering method with Si target and Ti target. The film thickness ranges between 250 and 480 nm. X-ray diffraction (XRD), high resolution transmission electron miscopy (HRTEM) and X-ray photoelectron spectroscopy (XPS) reveal significant charge transfer between Ti and Si and uniform dispersion of Ti-Si alloy nanograins in the amorphous Si thin films. It is found that decreasing the grain size of the Ti _xSi _y alloy below 2 nm, can improve the cyclic performance over pure Si thin film electrodes and those containing larger Ti-Si grains. This is mainly related to the improved mechanical properties that result from dispersing small grains of Ti-Si. The throughout thin film cracks formed after 10 electrochemical cycles are finer and more curved compared to the other thin films with the same film thickness. Furthermore, the width of the cracks, as well as, the area and junction angles of the remained fractured particle size of all electrode films considered, is compared and analyzed, after 10 cycles.

Original language	English (US)
Pages (from-to)	236-245
Number of pages	10
Journal	Journal of Power Sources
Volume	202
DOIs	https://doi.org/10.1016/j.jpowsour.2011.11.027
State	Published - Mar 15 2012
Externally published	Yes

Keywords

Anode lithium ion battery
Crack
Nanocomposite
Thin film
Ti-Si

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment
Energy Engineering and Power Technology
Physical and Theoretical Chemistry
Electrical and Electronic Engineering

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10.1016/j.jpowsour.2011.11.027

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@article{34ec25c693cd4535ad5beb7fc0aa1098,

title = "Investigation of crack patterns and cyclic performance of Ti-Si nanocomposite thin film anodes for lithium ion batteries",

abstract = "Three different Ti-Si nanocomposite thin films are prepared by the co-sputtering method with Si target and Ti target. The film thickness ranges between 250 and 480 nm. X-ray diffraction (XRD), high resolution transmission electron miscopy (HRTEM) and X-ray photoelectron spectroscopy (XPS) reveal significant charge transfer between Ti and Si and uniform dispersion of Ti-Si alloy nanograins in the amorphous Si thin films. It is found that decreasing the grain size of the Ti xSi y alloy below 2 nm, can improve the cyclic performance over pure Si thin film electrodes and those containing larger Ti-Si grains. This is mainly related to the improved mechanical properties that result from dispersing small grains of Ti-Si. The throughout thin film cracks formed after 10 electrochemical cycles are finer and more curved compared to the other thin films with the same film thickness. Furthermore, the width of the cracks, as well as, the area and junction angles of the remained fractured particle size of all electrode films considered, is compared and analyzed, after 10 cycles.",

keywords = "Anode lithium ion battery, Crack, Nanocomposite, Thin film, Ti-Si",

author = "Wang, {Y. H.} and Y. He and Xiao, {R. J.} and H. Li and Aifantis, {K. E.} and Huang, {X. J.}",

note = "Funding Information: Financial support from CAS ( KJCX2-YW-W26 ), NSFC ( 50730005 ) projects, “973” project ( 2007CB936501 ) and “863” project ( 2009AA033101 ) is acknowledged. The authors thank Dr. Yanyan Liu for the help of the SEM experiments and Dr. Xuekui Xi for helpful discussions. KEA acknowledges support from the European Research Council Starting Grant MINATRAN 211166 and helpful discussions from Professor J. Goddard. ",

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doi = "10.1016/j.jpowsour.2011.11.027",

language = "English (US)",

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pages = "236--245",

journal = "Journal of Power Sources",

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TY - JOUR

T1 - Investigation of crack patterns and cyclic performance of Ti-Si nanocomposite thin film anodes for lithium ion batteries

AU - Wang, Y. H.

AU - He, Y.

AU - Xiao, R. J.

AU - Li, H.

AU - Aifantis, K. E.

AU - Huang, X. J.

N1 - Funding Information: Financial support from CAS ( KJCX2-YW-W26 ), NSFC ( 50730005 ) projects, “973” project ( 2007CB936501 ) and “863” project ( 2009AA033101 ) is acknowledged. The authors thank Dr. Yanyan Liu for the help of the SEM experiments and Dr. Xuekui Xi for helpful discussions. KEA acknowledges support from the European Research Council Starting Grant MINATRAN 211166 and helpful discussions from Professor J. Goddard.

PY - 2012/3/15

Y1 - 2012/3/15

N2 - Three different Ti-Si nanocomposite thin films are prepared by the co-sputtering method with Si target and Ti target. The film thickness ranges between 250 and 480 nm. X-ray diffraction (XRD), high resolution transmission electron miscopy (HRTEM) and X-ray photoelectron spectroscopy (XPS) reveal significant charge transfer between Ti and Si and uniform dispersion of Ti-Si alloy nanograins in the amorphous Si thin films. It is found that decreasing the grain size of the Ti xSi y alloy below 2 nm, can improve the cyclic performance over pure Si thin film electrodes and those containing larger Ti-Si grains. This is mainly related to the improved mechanical properties that result from dispersing small grains of Ti-Si. The throughout thin film cracks formed after 10 electrochemical cycles are finer and more curved compared to the other thin films with the same film thickness. Furthermore, the width of the cracks, as well as, the area and junction angles of the remained fractured particle size of all electrode films considered, is compared and analyzed, after 10 cycles.

AB - Three different Ti-Si nanocomposite thin films are prepared by the co-sputtering method with Si target and Ti target. The film thickness ranges between 250 and 480 nm. X-ray diffraction (XRD), high resolution transmission electron miscopy (HRTEM) and X-ray photoelectron spectroscopy (XPS) reveal significant charge transfer between Ti and Si and uniform dispersion of Ti-Si alloy nanograins in the amorphous Si thin films. It is found that decreasing the grain size of the Ti xSi y alloy below 2 nm, can improve the cyclic performance over pure Si thin film electrodes and those containing larger Ti-Si grains. This is mainly related to the improved mechanical properties that result from dispersing small grains of Ti-Si. The throughout thin film cracks formed after 10 electrochemical cycles are finer and more curved compared to the other thin films with the same film thickness. Furthermore, the width of the cracks, as well as, the area and junction angles of the remained fractured particle size of all electrode films considered, is compared and analyzed, after 10 cycles.

KW - Anode lithium ion battery

KW - Crack

KW - Nanocomposite

KW - Thin film

KW - Ti-Si

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JO - Journal of Power Sources

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ER -

Investigation of crack patterns and cyclic performance of Ti-Si nanocomposite thin film anodes for lithium ion batteries

Abstract

Keywords

ASJC Scopus subject areas

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