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Issue 15, 2016
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Superior cycling performance of a sandwich structure Si/C anode for lithium ion batteries

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Abstract

Silicon, as a next generation anode material, suffers from low electronic conductivity and large volume changes during the lithiation/delithiation process, resulting in very large capacity fading upon cycling. Herein, we design a novel sandwich-structured Si/C electrode formed between two conductive carbon layers. In this configuration, the bottom carbon layer functions as a buffer layer to increase the adhesion to the Cu foil and to avoid peeling-off of the active materials, whereas the top carbon layer on the electrolyte side serves as a barrier layer to prevent the electrode surface from cracking and delaminating. As expected, the sandwich-structured Si/C electrode delivers a high reversible capacity of 1230 mA h gāˆ’1 at current density of 150 mA gāˆ’1 and exhibits excellent cycling stability without obvious capacity decay after 70 cycles. This simple and effective design would be a promising approach to obtain high performance and cost-effective Si anodes on a large-scale, especially for industrial manufacturing of high energy density Li-ion batteries.

Graphical abstract: Superior cycling performance of a sandwich structure Si/C anode for lithium ion batteries

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Supplementary files

Article information


Submitted
05 Nov 2015
Accepted
30 Dec 2015
First published
06 Jan 2016

RSC Adv., 2016,6, 12107-12113
Article type
Paper

Superior cycling performance of a sandwich structure Si/C anode for lithium ion batteries

Z. Yang, Y. Xia, J. Ji, B. Qiu, K. Zhang and Z. Liu, RSC Adv., 2016, 6, 12107
DOI: 10.1039/C5RA23283J

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