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Green carbon nanofiber networks for advanced energy storage
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.ORCID iD: 0000-0002-1484-7224
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.ORCID iD: 0000-0003-1776-2725
Microelectronics Research Group, University of Oulu, FI-90570 Oulu, Finland.
Microelectronics Research Group, University of Oulu, FI-90570 Oulu, Finland.
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2020 (English)In: ACS Applied Energy Materials, E-ISSN 2574-0962, Vol. 3, no 4, p. 3530-3540Article in journal (Refereed) Published
Abstract [en]

Energy storage devices such as supercapacitors of high-performance are in great need due to the continuous expansion of digitalization and related devices for mobile electronics, autonomous sensors and vehicles of different kinds. However, the non-renewable resources and often complex preparation processes associated with electrode materials and structure pose limited scale-up in production and difficulties in versatile utilization of the devices. Here, free-standing and flexible carbon nanofiber networks derived from renewable and abundant bio-resources are demonstrated. By a simple optimization of carbonization, the carbon nanofiber networks reach a large surface area of 1670 m2 g-1 and excellent specific gravimetric capacitance of ~240 F g-1, outperforming many other nanostructured carbon, activated carbon and even those decorated with metal oxides. The remarkable electrochemical performance and flexibility of the green carbon networks enable an all-solid-state supercapacitor device, which displays a device capacitance of 60.4 F g-1 with a corresponding gravimetric energy density of 8.4 Wh kg-1 while maintaining good mechanical properties.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2020. Vol. 3, no 4, p. 3530-3540
Keywords [en]
green carbon, electronics, energy storage, lignin, electrospinning
National Category
Bio Materials
Research subject
Wood and Bionanocomposites
Identifiers
URN: urn:nbn:se:ltu:diva-78328DOI: 10.1021/acsaem.0c00065ISI: 000529190300048Scopus ID: 2-s2.0-85088896686OAI: oai:DiVA.org:ltu-78328DiVA, id: diva2:1421503
Funder
Swedish Research Council, Carbon Lignin 2017-04240Bio4Energy
Note

Validerad;2020;Nivå 2;2020-05-28 (alebob)

Available from: 2020-04-03 Created: 2020-04-03 Last updated: 2023-09-05Bibliographically approved

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Wei, JiayuanGeng, ShiyuOksman, Kristiina

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