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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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Publication details

The article was received on 01 Jul 2019, accepted on 26 Aug 2019 and first published on 04 Sep 2019


Article type: Paper
DOI: 10.1039/C9RA04980K
RSC Adv., 2019,9, 27927-27936
  • Open access: Creative Commons BY-NC license
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    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

    This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence. Material from this article can be used in other publications provided that the correct acknowledgement is given with the reproduced material and it is not used for commercial purposes.

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