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Facile stitching of graphene oxide nanosheets with ethylenediamine as three dimensional anode material for lithium-ion battery
Amirkabir Univ Technol, Dept Chem, Tehran, Iran;Amirkabir Univ Technol, Renewable Energy Res Ctr, Tehran, Iran.
Amirkabir Univ Technol, Dept Chem, Tehran, Iran;Amirkabir Univ Technol, Renewable Energy Res Ctr, Tehran, Iran.
Amirkabir Univ Technol, Renewable Energy Res Ctr, Tehran, Iran;IROST, Dept Chem Technol, Tehran, Iran.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Structural Chemistry.ORCID iD: 0000-0002-8019-2801
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2020 (English)In: Journal of Alloys and Compounds, ISSN 0925-8388, E-ISSN 1873-4669, Vol. 818, article id 152912Article in journal (Refereed) Published
Abstract [en]

In this study, we employed an efficient and straightforward synthesis method for the functionalization and stitching of graphene oxide (GO) sheets with ethylenediamine (EDA). 3-D-structured GO-EDA was prepared by low reduction of the oxygen-containing functional groups of GO. The EDA was used as a nitrogen source to create the nitrogen-doped graphene (N-graphene), as well as a factor to control the self-assembly of graphene nanosheets into 3-D structures. The morphology, composition, and covalently grafted functional groups of GO-EDA were investigated by FT-IR and Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), Scanning electron microscopy (SEM), Transmission electron microscopy (TEM), and various electrochemical techniques. GO-EDA exhibits a layered structure resembling graphite, with an enhanced d-spacing of 0.373 nm compared with graphite (0.348 nm). The results showed that the porous channels of the synthesized GO-EDA facilitate the efficient transportation of lithium ions through the electrolyte-filled channels. The first discharge and charge showed specific capacities of 830.34 mAh g(-1) and 664 mAh g(-1), respectively at the current density of 100 mA g(-1), corresponding to an initial coulombic efficiency of ca. similar to 80%; superior to the GO reference (27.8%). Moreover, GO-EDA displayed improve cycling stability (maintaining a reversible capacity of similar to 300 mAh g(-1) at 200 mA g(-1) after 100 cycles). The improved electrochemical operation was ascribed to enhanced ion (Li+) transport within the graphitic layers by the increased d-spacing due to the inserted functional groups. 

Place, publisher, year, edition, pages
ELSEVIER SCIENCE SA , 2020. Vol. 818, article id 152912
Keywords [en]
Lithium-ion batteries (LIBs), Graphene-based anode materials, Ethylenediamine, Functionalized graphene oxide
National Category
Materials Chemistry
Identifiers
URN: urn:nbn:se:uu:diva-403256DOI: 10.1016/j.jallcom.2019.152912ISI: 000506166900062OAI: oai:DiVA.org:uu-403256DiVA, id: diva2:1388634
Available from: 2020-01-27 Created: 2020-01-27 Last updated: 2020-01-27Bibliographically approved

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Brandell, DanielLee, Ming-Tao

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