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Carbonized cellulose beads for efficient capacitive energy storage
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Nanotechnology and Functional Materials.ORCID iD: 0000-0001-6068-8597
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Inorganic Chemistry.ORCID iD: 0000-0001-6118-0226
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Nanotechnology and Functional Materials.ORCID iD: 0000-0001-5196-4115
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Nanotechnology and Functional Materials.ORCID iD: 0000-0002-5496-9664
2018 (English)In: Cellulose (London), ISSN 0969-0239, E-ISSN 1572-882X, Vol. 25, no 6, p. 3545-3556Article in journal (Refereed) Published
Abstract [en]

Natural biomaterials, including polysaccharides and amino acids, provide a sustainable source of functional carbon materials for electric energy storage applications. We present a one-pot reductive amination process to functionalize 2,3-dialdehyde cellulose (DAC) beads with chitosan and l-cysteine to provide single (N)- and dual (N/S)-doped materials. The functionalization enables the physicochemical properties of the materials to be tailored and can provide carbon precursors with heteroatom doping suitable for energy storage applications. Scanning electron microscopy, Fourier transform infrared spectroscopy and thermogravimetric analysis were used to characterize the changes to the beads after functionalization and carbonization. The results of X-ray photoelectron spectroscopy and energy-dispersive X-ray spectroscopy verified that the doping was effective, while the nitrogen sorption isotherms and pore-size distributions of the carbonized beads showed the effects of doping with different hierarchical porosities. In the electrochemical experiments, three kinds of carbon beads [pyrolyzed from DAC, chitosan-crosslinked DAC (CS-DAC) and l-cysteine-functionalized DAC] were used as electrode materials. Electrodes of carbonized CS-DAC beads had a specific capacitance of up to 242 F g(-1) at a current density of 1 A g(-1). These electrodes maintained a capacitance retention of 91.5% after 1000 charge/discharge cycles, suggesting excellent cycling stability. The results indicate that reductive amination of DAC is an effective route for heteroatom doping of carbon materials to be used as electrode active materials for energy storage.

Place, publisher, year, edition, pages
2018. Vol. 25, no 6, p. 3545-3556
Keywords [en]
2, 3-Dialdehyde cellulose (DAC) beads, Nitrogen doping, Nitrogen/sulfur doping, Supercapacitor
National Category
Materials Chemistry Physical Chemistry Engineering and Technology
Identifiers
URN: urn:nbn:se:uu:diva-357553DOI: 10.1007/s10570-018-1811-6ISI: 000432990300030OAI: oai:DiVA.org:uu-357553DiVA, id: diva2:1239738
Funder
Swedish Foundation for Strategic Research Stiftelsen Olle Engkvist ByggmästareAvailable from: 2018-08-17 Created: 2018-08-17 Last updated: 2018-08-17Bibliographically approved

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Ruan, ChangqingWang, ZhaohuiLindh, JonasStrömme, Maria

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