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dc.contributor.authorAbbas, Aumberen_US
dc.contributor.authorAbbas, Saleemen_US
dc.contributor.authorBhattarai, Arjunen_US
dc.contributor.authorNaziah Mohamad Latiffen_US
dc.contributor.authorWai, Nyunten_US
dc.contributor.authorPhan, Anh N.en_US
dc.contributor.authorLim, Tuti Marianaen_US
dc.identifier.citationAbbas, A., Abbas, S., Bhattarai, A., Naziah Mohamad Latiff, Wai, N., Phan, A. N., & Lim, T. M. (2021). Effect of electrode porosity on the charge transfer in vanadium redox flow battery. Journal of Power Sources, 488, 229411-. doi:10.1016/j.jpowsour.2020.229411en_US
dc.description.abstractVanadium redox flow battery (VRB) has attracted enormous attention as a large-scale energy storage system owing to its long life, stable capacity and high safety. The electrode porosity plays a crucial role in the performance of VRB. This work reports the effect of electrode porosity on the electrocatalytic activity and charge transfer in VRB using spent tea derived porous carbon as electrode material. The electrode porous microstructure is systematically modified and specific surface area is enhanced from ~10 to ~2085 m2 g⁻1, with microporosity up to ~1930 m2 g⁻1. The electrochemical performance of modified electrodes is comprehensively investigated by cyclic voltammetry, impedance spectroscopy and galvanostatic charge/discharge studies. The modified electrode with high degree of porosity improves the charge transfer process and exhibits lower charge transfer resistance with higher electrocatalytic activity for vanadium redox reactions. Moreover, the VRB static cell performance demonstrates superior energy, voltage and coulombic efficiencies for modified electrodes than the pristine graphite electrode at all tested current densities. The results suggest that the tailored porosity substantially influences the charge migration and significantly improves the VRB performance.en_US
dc.relation.ispartofJournal of Power Sourcesen_US
dc.rights© 2021 Elsevier B.V. All rights reserved. This paper was published in Journal of Power Sources and is made available with permission of Elsevier B.V.en_US
dc.subjectEngineering::Civil engineeringen_US
dc.titleEffect of electrode porosity on the charge transfer in vanadium redox flow batteryen_US
dc.typeJournal Articleen
dc.contributor.schoolSchool of Civil and Environmental Engineeringen_US
dc.contributor.researchNanyang Environment and Water Research Instituteen_US
dc.contributor.researchEnergy Research Institute @ NTU (ERI@N)en_US
dc.description.versionAccepted versionen_US
dc.subject.keywordsElectrode Porosityen_US
dc.subject.keywordsCharge Transferen_US
dc.description.acknowledgementThe authors gratefully acknowledge the financial support from the Faculty of Science, Agriculture & Engineering (SAgE), School of Engineering, and International Fund Partnership Newcastle University for their financial support (OSR/0530/SD16/ABBA). The moral support from Taskeen Zahra is exceptionally acknowledged. Authors appreciatively acknowledge the XPS data collection from the EPSRC National Facility for XPS (HarwellXPS), operated by Cardiff University and UCL, under contract no. PR16195. SGL Carbon products utilised in this study were of high quality and their support is thankfully acknowledged. Fruitful discussions with Prof Steve Bull and Prof Mark Thomas are thankfully acknowledged.en_US
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