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Smart construction of 3D N-doped graphene honeycombs with (NH4)2SO4 as a multifunctional template for Li-ion battery anode: “A choice serves three purposes”

Abstract

Not only theoretical studies predicted that doping graphene with nitrogen can tailor its electronic properties and chemical reactivity. Also practical results have shown that tuning the shapes of graphene could make it more applicable for electronic devices. However, the successful transfer of lab procedures into commercialization and scale-up fabrication of N-doped graphene with specific architectures still face great challenges at the moment. Herein, we report a smart approach to rationally design and deliberately construct 3D N-doped honeycomb-structured graphene, denoted as 3D-NHrGO, by a (NH4)2SO4-templated self-assembly method in which (NH4)2SO4 plays the role of “A choice serves three purposes”. (NH4)2SO4 can not only facilitate the ultrafast separation of GO from the obtained mixed liquor of Hummers method, but also act as a nitrogen source and a green template to tailor the electronic properties as well as feature the morphology of 3D-NHrGO, respectively. Particularly, (NH4)2SO4 can be recovered with simple recrystallization in the end of synthesis, which makes the process environmental-friendly and resource effective utility. The compositions, structures and morphologies of the samples during overall evolution of synthetic procedure are investigated, and the existence of N substitution in the graphene framework is also evidenced. When evaluated as an anode material for Li-ion battery, the 3D-NHrGO gives high rate capability and stable cycle life. This research inspires a new methodology in addressing the enormous problems associated in traditional graphene preparation process while using GO as the precursor, and sheds light on the great potential of industrially viable manufacturing 3D N-doped graphene architectures for other applications.

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Publication details

The article was received on 27 Nov 2018, accepted on 07 Feb 2019 and first published on 07 Feb 2019


Article type: Paper
DOI: 10.1039/C8GC03702G
Citation: Green Chem., 2019, Accepted Manuscript

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    Smart construction of 3D N-doped graphene honeycombs with (NH4)2SO4 as a multifunctional template for Li-ion battery anode: “A choice serves three purposes”

    K. Wu, H. Yang, L. Jia, Y. pan, Y. Hao, K. Zhang, K. du and G. Hu, Green Chem., 2019, Accepted Manuscript , DOI: 10.1039/C8GC03702G

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