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  • Bellani, SebastianoBeDimens Spa, I-16163 Genoa, Italy.;Ist Italiano Tecnol, Graphene Labs, I-16163 Genoa, Italy. (author)

Graphene-Based Electrodes in a Vanadium Redox Flow Battery Produced by Rapid Low-Pressure Combined Gas Plasma Treatments

  • Article/chapterEnglish2021

Publisher, publication year, extent ...

  • 2021-05-26
  • American Chemical Society (ACS),2021
  • electronicrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:uu-449345
  • https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-449345URI
  • https://doi.org/10.1021/acs.chemmater.1c00763DOI

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  • Language:English
  • Summary in:English

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  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • The development of high-power density vanadium redox flow batteries (VRFBs) with high energy efficiencies (EEs) is crucial for the widespread dissemination of this energy storage technology. In this work, we report the production of novel hierarchical carbonaceous nanomaterials for VRFB electrodes with high catalytic activity toward the vanadium redox reactions (VO2+/VO2+ and V2+/V3+). The electrode materials are produced through a rapid (minute timescale) low-pressure combined gas plasma treatment of graphite felts (GFs) in an inductively coupled radio frequency reactor. By systematically studying the effects of either pure gases (O-2 and N-2) or their combination at different gas plasma pressures, the electrodes are optimized to reduce their kinetic polarization for the VRFB redox reactions. To further enhance the catalytic surface area of the electrodes, single-/fewlayer graphene, produced by highly scalable wet-jet milling exfoliation of graphite, is incorporated into the GFs through an infiltration method in the presence of a polymeric binder. Depending on the thickness of the proton-exchange membrane (Nafion 115 or Nafion XL), our optimized VRFB configurations can efficiently operate within a wide range of charge/discharge current densities, exhibiting energy efficiencies up to 93.9%, 90.8%, 88.3%, 85.6%, 77.6%, and 69.5% at 25, 50, 75, 100, 200, and 300 mA cm(-2), respectively. Our technology is cost-competitive when compared to commercial ones (additional electrode costs < 100 (sic) m(-2)) and shows EEs rivalling the record-high values reported for efficient systems to date. Our work remarks on the importance to study modified plasma conditions or plasma methods alternative to those reported previously (e.g., atmospheric plasmas) to improve further the electrode performances of the current VRFB systems.

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  • Najafi, LeylaBeDimens Spa, I-16163 Genoa, Italy.;Ist Italiano Tecnol, Graphene Labs, I-16163 Genoa, Italy. (author)
  • Prato, MirkoIst Italiano Tecnol, Mat Characterizat Facil, I-16163 Genoa, Italy. (author)
  • Oropesa Nunez, ReinierUppsala universitet,Fasta tillståndets fysik(Swepub:uu)reior263 (author)
  • Martin-Garcia, BeatrizIst Italiano Tecnol, Graphene Labs, I-16163 Genoa, Italy.;CIC NanoGUNE, Donostia San Sebastian 20018, Basque, Spain. (author)
  • Gagliani, LucaIst Italiano Tecnol, Graphene Labs, I-16163 Genoa, Italy. (author)
  • Mantero, ElisaBeDimens Spa, I-16163 Genoa, Italy.;Ist Italiano Tecnol, Graphene Labs, I-16163 Genoa, Italy. (author)
  • Marasco, LuigiIst Italiano Tecnol, Graphene Labs, I-16163 Genoa, Italy. (author)
  • Bianca, GabrieleIst Italiano Tecnol, Graphene Labs, I-16163 Genoa, Italy.;Univ Genoa, Dipartimento Chim & Chim Ind, I-16146 Genoa, Italy. (author)
  • Zappia, Marilena, IBeDimens Spa, I-16163 Genoa, Italy.;Univ Calabria, Dept Phys, I-87036 Cosenza, Italy. (author)
  • Demirci, CansunurUniv Genoa, Dipartimento Chim & Chim Ind, I-16146 Genoa, Italy.;Ist Italiano Tecnol, NanoChem, I-16163 Genoa, Italy. (author)
  • Olivotto, SilviaEnel Global Power Generat, Wind Technol Innovat, Rome, Italy. (author)
  • Mariucci, GiacomoEnel Green Power SpA, Storage & New Business Design Engn & Construct, Rome, Italy. (author)
  • Pellegrini, VittorioBeDimens Spa, I-16163 Genoa, Italy.;Ist Italiano Tecnol, Graphene Labs, I-16163 Genoa, Italy. (author)
  • Schiavetti, MassimoEnel Global Power Generat, Thermal & Ind Innovat 40, Rome, Italy. (author)
  • Bonaccorso, FrancescoBeDimens Spa, I-16163 Genoa, Italy.;Ist Italiano Tecnol, Graphene Labs, I-16163 Genoa, Italy. (author)
  • BeDimens Spa, I-16163 Genoa, Italy.;Ist Italiano Tecnol, Graphene Labs, I-16163 Genoa, Italy.Ist Italiano Tecnol, Mat Characterizat Facil, I-16163 Genoa, Italy. (creator_code:org_t)

Related titles

  • In:Chemistry of Materials: American Chemical Society (ACS)33:11, s. 4106-41210897-47561520-5002

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