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Nanomaterials 2015, 5(4), 2268-2278; doi:10.3390/nano5042268

Simulation of the Impact of Si Shell Thickness on the Performance of Si-Coated Vertically Aligned Carbon Nanofiber as Li-Ion Battery Anode

1
Department of Electrical Engineering & Computer Science, The University of Kansas, Lawrence, KS 66045, USA
2
Department of Chemistry, Kansas State University, Manhattan, KS 66506-0401, USA
*
Author to whom correspondence should be addressed.
Academic Editors: Andy (Xueliang) Sun and Xifei Li
Received: 12 October 2015 / Revised: 7 December 2015 / Accepted: 9 December 2015 / Published: 15 December 2015
(This article belongs to the Special Issue Nanostructured Materials for Li-Ion Batteries and Beyond)
View Full-Text   |   Download PDF [1981 KB, uploaded 15 December 2015]   |  

Abstract

Micro- and nano-structured electrodes have the potential to improve the performance of Li-ion batteries by increasing the surface area of the electrode and reducing the diffusion distance required by the charged carriers. We report the numerical simulation of Lithium-ion batteries with the anode made of core-shell heterostructures of silicon-coated carbon nanofibers. We show that the energy capacity can be significantly improved by reducing the thickness of the silicon anode to the dimension comparable or less than the Li-ion diffusion length inside silicon. The results of simulation indicate that the contraction of the silicon electrode thickness during the battery discharge process commonly found in experiments also plays a major role in the increase of the energy capacity. View Full-Text
Keywords: Li-ion batteries; battery performance; nanostructures; numerical simulations; silicon anode; carbon nanowires Li-ion batteries; battery performance; nanostructures; numerical simulations; silicon anode; carbon nanowires
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Das, S.; Li, J.; Hui, R. Simulation of the Impact of Si Shell Thickness on the Performance of Si-Coated Vertically Aligned Carbon Nanofiber as Li-Ion Battery Anode. Nanomaterials 2015, 5, 2268-2278.

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