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Issue 48, 2019, Issue in Progress
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Design of highly porous Fe3O4@reduced graphene oxide via a facile PMAA-induced assembly

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Abstract

Advances in the synthesis and processing of graphene-based materials have presented the opportunity to design novel lithium-ion battery (LIB) anode materials that can meet the power requirements of next-generation power devices. In this work, a poly(methacrylic acid) (PMAA)-induced self-assembly process was used to design super-mesoporous Fe3O4 and reduced-graphene-oxide (Fe3O4@RGO) anode materials. We demonstrate the relationship between the media pH and Fe3O4@RGO nanostructure, in terms of dispersion state of PMAA-stabilized Fe3O4@GO sheets at different surrounding pH values, and porosity of the resulted Fe3O4@RGO anode. The anode shows a high surface area of 338.8 m2 g−1 with a large amount of 10–40 nm mesopores, which facilitates the kinetics of Li-ions and electrons, and improves electrode durability. As a result, Fe3O4@RGO delivers high specific-charge capacities of 740 mA h g−1 to 200 mA h g−1 at various current densities of 0.5 A g−1 to 10 A g−1, and an excellent capacity-retention capability even after long-term charge–discharge cycles. The PMAA-induced assembly method addresses the issue of poor dispersion of Fe3O4-coated graphene materials—which is a major impediment in the synthesis process—and provides a facile synthetic pathway for depositing Fe3O4 and other metal oxide nanoparticles on highly porous RGO.

Graphical abstract: Design of highly porous Fe3O4@reduced graphene oxide via a facile PMAA-induced assembly

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Supplementary files

Article information


Submitted
01 Jul 2019
Accepted
26 Aug 2019
First published
04 Sep 2019

This article is Open Access

RSC Adv., 2019,9, 27927-27936
Article type
Paper

Design of highly porous Fe3O4@reduced graphene oxide via a facile PMAA-induced assembly

H. Wang, M. Kalubowilage, S. H. Bossmann and P. B. Amama, RSC Adv., 2019, 9, 27927
DOI: 10.1039/C9RA04980K

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    [Original citation] - Published by The Royal Society of Chemistry.

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