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Simulation of the Impact of Si Shell Thickness on the Performance of Si-Coated Vertically Aligned Carbon Nanofiber as Li-Ion Battery Anode
Das, Susobhan Li, Jun Hui, Rongqing
Das, Susobhan
Li, Jun
Hui, Rongqing
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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.
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Date
2016
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MDPI
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Hai_2015.pdf
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Keywords
Li-ion batteries, battery performance, nanostructures, numerical simulations, silicon anode, carbon nanowires
Citation
Das, S., Li, J., & Hui, R. (2015). Simulation of the impact of Si shell thickness on the performance of Si-coated vertically aligned carbon nanofiber as Li-ion battery anode. Nanomaterials, 5(4), 2268-2278.