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Zirconium oxide nanotube-Nafion composite as high performance membrane for all vanadium redox flow battery

Title
Zirconium oxide nanotube-Nafion composite as high performance membrane for all vanadium redox flow battery
Authors
Aziz, MA[Aziz, Md. Abdul]Shanmugam, S[Shanmugam, Sangaraju]
DGIST Authors
Shanmugam, S[Shanmugam, Sangaraju]
Issue Date
2017-01-01
Citation
Journal of Power Sources, 337, 36-44
Type
Article
Article Type
Article
Keywords
All Vanadium Redox Flow BatteryCharge-Discharge CycleComposite MembranesElectric BatteriesElectrospinningEnergy EfficiencyFlow BatteriesHigh Energy EfficiencyHigh Performance CompositesIonsMembranesNafion Composite MembraneNafion Composite MembranesNanotubesOpen Circuit VoltageOxidesPerfluorosulfonic AcidProton ConductivitySecondary BatteriesVanadiumVanadium CrossoverVanadium Ion PermeabilitiesVanadium Redox Flow BatteriesVanadium Redox Flow BatteryYarnZirconiaZirconium AlloysZrO2 Nanotubes
ISSN
0378-7753
Abstract
A high-performance composite membrane for vanadium redox flow battery (VRB) consisting of ZrO2 nanotubes (ZrNT) and perfluorosulfonic acid (Nafion) was fabricated. The VRB operated with a composite (Nafion-ZrNT) membrane showed the improved ion-selectivity (ratio of proton conductivity to permeability), low self-discharge rate, high discharge capacity and high energy efficiency in comparison with a pristine commercial Nafion-117 membrane. The incorporation of zirconium oxide nanotubes in the Nafion matrix exhibits high proton conductivity (95.2 mS cm−1) and high oxidative stability (99.9%). The Nafion-ZrNT composite membrane exhibited low vanadium ion permeability (3.2 × 10−9 cm2 min−1) and superior ion selectivity (2.95 × 107 S min cm−3). The VRB constructed with a Nafion-ZrNT composite membrane has lower self-discharge rate maintaining an open-circuit voltage of 1.3 V for 330 h relative to a pristine Nafion membrane (29 h). The discharge capacity of Nafion-ZrNT membrane (987 mAh) was 3.5-times higher than Nafion-117 membrane (280 mAh) after 100 charge-discharge cycles. These superior properties resulted in higher coulombic and voltage efficiencies with Nafion-ZrNT membranes compared to VRB with Nafion-117 membrane at a 40 mA cm−2 current density. © 2016 Elsevier B.V.
URI
http://hdl.handle.net/20.500.11750/2055
DOI
10.1016/j.jpowsour.2016.10.113
Publisher
Elsevier B.V.
Related Researcher
Files:
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Collection:
Energy Science and EngineeringAdvanced Energy Materials Laboratory1. Journal Articles


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