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Open AccessArticle

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

by Susobhan Das 1, Jun Li 2 and Rongqing Hui 1,*
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
Nanomaterials 2015, 5(4), 2268-2278; https://doi.org/10.3390/nano5042268
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)
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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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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