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Zirconium oxide nanotube-Nafion composite as high performance membrane for all vanadium redox flow battery
- Zirconium oxide nanotube-Nafion composite as high performance membrane for all vanadium redox flow battery
- Aziz, MA[Aziz, Md. Abdul]; Shanmugam, S[Shanmugam, Sangaraju]
- DGIST Authors
- Shanmugam, S[Shanmugam, Sangaraju]
- Issue Date
- Journal of Power Sources, 337, 36-44
- Article Type
- All Vanadium Redox Flow Battery; Charge-Discharge Cycle; Composite Membranes; Electric Batteries; Electrospinning; Energy Efficiency; Flow Batteries; High Energy Efficiency; High Performance Composites; Ions; Membranes; Nafion Composite Membrane; Nafion Composite Membranes; Nanotubes; Open Circuit Voltage; Oxides; Perfluorosulfonic Acid; Proton Conductivity; Secondary Batteries; Vanadium; Vanadium Crossover; Vanadium Ion Permeabilities; Vanadium Redox Flow Batteries; Vanadium Redox Flow Battery; Yarn; Zirconia; Zirconium Alloys; ZrO2 Nanotubes
- 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.
- Elsevier B.V.
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- Energy Science and EngineeringAdvanced Energy Materials Laboratory1. Journal Articles
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