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Issue 39, 2017, Issue in Progress
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Structure-preserved 3D porous silicon/reduced graphene oxide materials as anodes for Li-ion batteries

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Abstract

Three dimensional (3D) porous silicon/reduced graphene oxide (Si/rGO) composites with typical networks have suffered damage during electrode preparation, which evidently affects the cycle and rate capabilities of Si/rGO anodes. Here, a controllable evaporation dry method is proposed to fabricate structure-preserved 3D porous Si/rGO anode materials by tuning the pore size distribution of the networks. As a result, after evaporation drying for 3.5 h, the optimal sample of 3D porous Si/rGO anode (denoted as Si–G-3.5) with a pore size of ∼500 nm could preserve its 3D network during the electrode preparation process. While the structures of Si/rGO composites with different drying times (denoted as Si–G-0, Si–G-2.5 and Si–G-4) failed to be preserved. Consequently, The Si–G-3.5 anode exhibits a high reversible specific capacity of 1563 mA h g−1 at 50 mA g−1, 90% capacity retention after 100 cycles and superior rate capability (955 mA h g−1 at 2 A g−1).

Graphical abstract: Structure-preserved 3D porous silicon/reduced graphene oxide materials as anodes for Li-ion batteries

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Article information


Submitted
23 Feb 2017
Accepted
26 Apr 2017
First published
04 May 2017

This article is Open Access

RSC Adv., 2017,7, 24305-24311
Article type
Paper

Structure-preserved 3D porous silicon/reduced graphene oxide materials as anodes for Li-ion batteries

K. Zhang, Y. Xia, Z. Yang, R. Fu, C. Shen and Z. Liu, RSC Adv., 2017, 7, 24305
DOI: 10.1039/C7RA02240A

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    [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the European Society for Photobiology, the European Photochemistry Association, and RSC.
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    [Original citation] - Published by The Royal Society of Chemistry.

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