Coaxial electrospun Si/C-C core-shell composite nanofibers as binder-free anodes for lithium-ion batteries

Ying Li; Guanjie Xu; Yingfang Yao; Leigang Xue; Meltem Yanilmaz; Hun Lee; Xiangwu Zhang

doi:10.1016/j.ssi.2014.02.003

Coaxial electrospun Si/C-C core-shell composite nanofibers as binder-free anodes for lithium-ion batteries

Ying Li, Guanjie Xu, Yingfang Yao, Leigang Xue, Meltem Yanilmaz, Hun Lee, Xiangwu Zhang^*

^*Corresponding author for this work

North Carolina State University

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

44 Citations (Scopus)

Abstract

Si/C-C core-shell nanofiber structure was designed by dual nozzle coaxial electrospinning and subsequent carbonization. This core-shell nanofiber structure has Si/C composite as the core and carbon as the shell. Used as an anode in lithium-ion batteries, the carbon shell can help buffer the large volume expansion/contraction of the Si/C core during charge/discharge and restrain the capacity fading caused by the mechanical failure of the active material. Results showed that after 50 cycles, the discharge capacity of Si/C-C core-shell composite nanofibers was 63% higher than that of Si/C composite nanofibers and the capacity retention increased from 48.6 to 72.4%. It is, therefore, demonstrated that Si/C-C core-shell composite nanofibers are promising anode material with large reversible capacity and good cycling stability.

Original language	English
Pages (from-to)	67-73
Number of pages	7
Journal	Solid State Ionics
Volume	258
DOIs	https://doi.org/10.1016/j.ssi.2014.02.003
Publication status	Published - 1 May 2014
Externally published	Yes

Funding

This research was supported by the U.S. Department of Energy under Grant No: DE-EE0001177 , Advanced Transportation Energy Center , and ERC Program of the National Science Foundation under Award Number EEC-08212121 .

Funders	Funder number
Advanced Transportation Energy Center
National Science Foundation	EEC-08212121
U.S. Department of Energy	DE-EE0001177
Engineering Research Centers

Keywords

Anode
Carbon nanofiber
Coaxial electrospinning
Lithium-ion battery
Si nanoparticle

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.ssi.2014.02.003

Cite this

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title = "Coaxial electrospun Si/C-C core-shell composite nanofibers as binder-free anodes for lithium-ion batteries",

abstract = "Si/C-C core-shell nanofiber structure was designed by dual nozzle coaxial electrospinning and subsequent carbonization. This core-shell nanofiber structure has Si/C composite as the core and carbon as the shell. Used as an anode in lithium-ion batteries, the carbon shell can help buffer the large volume expansion/contraction of the Si/C core during charge/discharge and restrain the capacity fading caused by the mechanical failure of the active material. Results showed that after 50 cycles, the discharge capacity of Si/C-C core-shell composite nanofibers was 63% higher than that of Si/C composite nanofibers and the capacity retention increased from 48.6 to 72.4%. It is, therefore, demonstrated that Si/C-C core-shell composite nanofibers are promising anode material with large reversible capacity and good cycling stability.",

keywords = "Anode, Carbon nanofiber, Coaxial electrospinning, Lithium-ion battery, Si nanoparticle",

author = "Ying Li and Guanjie Xu and Yingfang Yao and Leigang Xue and Meltem Yanilmaz and Hun Lee and Xiangwu Zhang",

year = "2014",

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doi = "10.1016/j.ssi.2014.02.003",

language = "English",

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journal = "Solid State Ionics",

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T1 - Coaxial electrospun Si/C-C core-shell composite nanofibers as binder-free anodes for lithium-ion batteries

AU - Li, Ying

AU - Xu, Guanjie

AU - Yao, Yingfang

AU - Xue, Leigang

AU - Yanilmaz, Meltem

AU - Lee, Hun

AU - Zhang, Xiangwu

PY - 2014/5/1

Y1 - 2014/5/1

N2 - Si/C-C core-shell nanofiber structure was designed by dual nozzle coaxial electrospinning and subsequent carbonization. This core-shell nanofiber structure has Si/C composite as the core and carbon as the shell. Used as an anode in lithium-ion batteries, the carbon shell can help buffer the large volume expansion/contraction of the Si/C core during charge/discharge and restrain the capacity fading caused by the mechanical failure of the active material. Results showed that after 50 cycles, the discharge capacity of Si/C-C core-shell composite nanofibers was 63% higher than that of Si/C composite nanofibers and the capacity retention increased from 48.6 to 72.4%. It is, therefore, demonstrated that Si/C-C core-shell composite nanofibers are promising anode material with large reversible capacity and good cycling stability.

AB - Si/C-C core-shell nanofiber structure was designed by dual nozzle coaxial electrospinning and subsequent carbonization. This core-shell nanofiber structure has Si/C composite as the core and carbon as the shell. Used as an anode in lithium-ion batteries, the carbon shell can help buffer the large volume expansion/contraction of the Si/C core during charge/discharge and restrain the capacity fading caused by the mechanical failure of the active material. Results showed that after 50 cycles, the discharge capacity of Si/C-C core-shell composite nanofibers was 63% higher than that of Si/C composite nanofibers and the capacity retention increased from 48.6 to 72.4%. It is, therefore, demonstrated that Si/C-C core-shell composite nanofibers are promising anode material with large reversible capacity and good cycling stability.

KW - Anode

KW - Carbon nanofiber

KW - Coaxial electrospinning

KW - Lithium-ion battery

KW - Si nanoparticle

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SN - 0167-2738

VL - 258

SP - 67

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JO - Solid State Ionics

JF - Solid State Ionics

ER -

Coaxial electrospun Si/C-C core-shell composite nanofibers as binder-free anodes for lithium-ion batteries

Abstract

Funding

Keywords

UN SDGs

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