Overcoming Voltage Losses in Vanadium Redox Flow Batteries Using WO3 as a Positive Electrode

Seyedabolfazl Mousavihashemi; Sebastián Murcia-López; Miguel A. Rodriguez-Olguin; Han Gardeniers; Teresa Andreu; Juan Ramon Morante; Arturo Susarrey Arce; Cristina Flox

doi:10.1002/cctc.202201106

Overcoming Voltage Losses in Vanadium Redox Flow Batteries Using WO₃ as a Positive Electrode

Seyedabolfazl Mousavihashemi
, Sebastián Murcia-López
, Miguel A. Rodriguez-Olguin
, Han Gardeniers
, Teresa Andreu
, Juan Ramon Morante
, Arturo Susarrey Arce
, Cristina Flox^*

^*Corresponding author for this work

Not published at VTT

Catalonia Institute for Energy Research (IREC)
University of Twente
University of Barcelona
Spanish National Research Council (CSIC)
Aalto University

Research output: Contribution to journal › Article › Scientific › peer-review

12 Citations (Scopus)

Abstract

Vanadium redox flow batteries (VRFBs) are appealing large-scale energy storage systems due to their unique properties of independent energy/power design. The VRFBs stack design is crucial for technology deployment in power applications. Besides the design, the stack suffers from high voltage losses caused by the electrodes. The introduction of active sites into the electrode to facilitate the reaction kinetic is crucial in boosting the power rate of the VRFBs. Here, an O-rich layer has been applied onto structured graphite felt (GF) by depositing WO₃ to increase the oxygen species content. The oxygen species are the active site during the positive reaction (VO₂⁺/VO²⁺) in VRFB. The increased electrocatalytic activity is demonstrated by the monoclinic (m)-WO₃/GF electrode that minimizes the voltage losses, yielding excellent performance results in terms of power density output and limiting current density (556 mWcm⁻²@800 mAcm⁻²). The results confirm that the m-WO₃/GF electrode is a promising electrode for high-power in VRFBs, overcoming the performance-limiting issues in a positive half-reaction.

Original language	English
Article number	e202201106
Pages (from-to)	e202201106
Journal	ChemCatChem
Volume	14
Issue number	23
DOIs	https://doi.org/10.1002/cctc.202201106
Publication status	Published - 7 Dec 2022
MoE publication type	A1 Journal article-refereed

Funding

Miguel A. Rodriguez-Olguin, Han Gardeniers, and Arturo Susarrey-Arce acknowledge the funding for their research received from the European Research Council (ERC) under the European Union's Horizon 2020 Research and Innovation Program (Grant agreement No. 742004). C. Flox acknowledges financial support from the Ministery of Science Spain, AEI Severo Ochoa Grant CEX2019-000917-S, and the European Commission under the grant MSCA-IF-EF-ST, proposal number 101026162. Miguel A. Rodriguez‐Olguin, Han Gardeniers, and Arturo Susarrey‐Arce acknowledge the funding for their research received from the European Research Council (ERC) under the European Union's Horizon 2020 Research and Innovation Program (Grant agreement No. 742004). C. Flox acknowledges financial support from the Ministery of Science Spain, AEI Severo Ochoa Grant CEX2019‐000917‐S, and the European Commission under the grant MSCA‐IF‐EF‐ST, proposal number 101026162.

Keywords

Positive Electrode
Pulsed Laser Deposition
Vanadium Redox Flow Batteries
Voltage losses
WO

Access to Document

10.1002/cctc.202201106

Cite this

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title = "Overcoming Voltage Losses in Vanadium Redox Flow Batteries Using WO3 as a Positive Electrode",

abstract = "Vanadium redox flow batteries (VRFBs) are appealing large-scale energy storage systems due to their unique properties of independent energy/power design. The VRFBs stack design is crucial for technology deployment in power applications. Besides the design, the stack suffers from high voltage losses caused by the electrodes. The introduction of active sites into the electrode to facilitate the reaction kinetic is crucial in boosting the power rate of the VRFBs. Here, an O-rich layer has been applied onto structured graphite felt (GF) by depositing WO3 to increase the oxygen species content. The oxygen species are the active site during the positive reaction (VO2+/VO2+) in VRFB. The increased electrocatalytic activity is demonstrated by the monoclinic (m)-WO3/GF electrode that minimizes the voltage losses, yielding excellent performance results in terms of power density output and limiting current density (556 mWcm−2@800 mAcm−2). The results confirm that the m-WO3/GF electrode is a promising electrode for high-power in VRFBs, overcoming the performance-limiting issues in a positive half-reaction.",

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