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High Performance Tin-coated Vertically Aligned Carbon Nanofiber Array Anode for Lithium-ion Batteries

Published online by Cambridge University Press:  02 July 2018

Gaind P. Pandey Open the ORCID record for Gaind P. Pandey [Opens in a new window] ,
Kobi Jones ,
Emery Brown ,
Jun Li  and
Lamartine Meda
Gaind P. Pandey*
Affiliation:
Department of Chemistry, Xavier University of Louisiana, New Orleans, LA 70125
Kobi Jones
Affiliation:
Department of Chemistry, Xavier University of Louisiana, New Orleans, LA 70125
Emery Brown
Affiliation:
Department of Chemistry, Kansas State University, Manhattan, KS 66506
Jun Li
Affiliation:
Department of Chemistry, Kansas State University, Manhattan, KS 66506
Lamartine Meda
Affiliation:
Department of Chemistry, Xavier University of Louisiana, New Orleans, LA 70125
*
*(Email: gpandey@xula.edu)
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Abstract

This study reports a high-performance tin (Sn)-coated vertically aligned carbon nanofiber array anode for lithium-ion batteries. The array electrodes have been prepared by coaxial sputter-coating of tin (Sn) shells on vertically aligned carbon nanofiber (VACNF) cores. The robust brush-like highly conductive VACNFs effectively connect high-capacity Sn shells for lithium-ion storage. A high specific capacity of 815 mAh g-1 of Sn was obtained at C/20 rate, reaching toward the maximum value of Sn. However, the electrode shows poor cycling performance with conventional LiPF6 based organic electrolyte. The addition of fluoroethylene carbonate (FEC) improve the performance significantly and the Sn-coated VACNFs anode shows stable cycling performance. The Sn-coated VACNF array anodes exhibit outstanding capacity retention in the half-cell tests with electrolyte containing 10 wt.% FEC and could deliver a reversible capacity of 480 mAh g-1 after 50 cycles at C/3 rate.

Keywords

energy storagescanning electron microscopy (SEM)Sncore/shell
Type
Articles
Information
MRS Advances , Volume 3 , Issue 60: Energy Materials and Technologies , 2018 , pp. 3519 - 3524
Copyright
Copyright © Materials Research Society 2018 

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References

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