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Fabrication of SPAEK-cerium zirconium oxide nanotube composite membrane with outstanding performance and durability for vanadium redox flow batteries
- Fabrication of SPAEK-cerium zirconium oxide nanotube composite membrane with outstanding performance and durability for vanadium redox flow batteries
- Hossain, Syed Imdadul; Aziz, Md. Abdul; Han, Da Bin; Selvam, Parasuraman; Shanmugam, Sangaraju
- DGIST Authors
- Shanmugam, Sangaraju
- Issue Date
- Journal of Materials Chemistry A, 6(41), 20205-20213
- Article Type
- POLY(ETHER ETHER KETONE); POLYMER ELECTROLYTE MEMBRANES; EXCHANGE MEMBRANES; FUEL-CELL; PHYSICOCHEMICAL PROPERTIES; PROTON CONDUCTIVITY; BLEND MEMBRANE; DRY CONDITIONS; DEGRADATION; COPOLYMERS
- Herein, an alternative sulfonated poly(arylene ether ketone) (SPAEK)-cerium zirconium oxide nanotube (Ce2Zr2O7NT) composite (SPAEK/Ce2Zr2O7) membrane has been proposed as a potential polymer electrolyte membrane for all vanadium redox flow batteries (VRFBs) performance. The as-prepared composite membrane showed higher ion selectivity and reduced vanadium ion crossover than the pristine SPAEK and NRE-212 (Nafion-212) membranes in VRFB operation. The vanadium ion permeability rate of SPAEK/Ce2Zr2O7 (2%) composite membrane was found to be 27-fold and 12-fold lower than that of commercial NRE-212 and pristine SPAEK membranes, respectively. VRFBs operated with SPAEK/Ce2Zr2O7 (441 h) were shown to have a lower self-discharge rate than pristine SPAEK (172 h) and NRE-212 (42 h) membranes, respectively. Finally, an electrochemical test of VRFB exhibited high retention capacity after 100 cycles for SPAEK/Ce2Zr2O7 membrane as compared to NRE-212 and pristine SPAEK, while the coulombic efficiency (99.42%) at 40 mA cm-2. The structure and morphology of Ce2Zr2O7NT and the composite membrane were investigated by means of XRD, SEM, and TEM, and a consistent chemical structure of SPAEK/Ce2Zr2O7 (2%) composite membrane before and after the chemical stability test was confirmed using 1H NMR. The composite with 2% filler exhibits improved thermal, mechanical, oxidative, and chemical stability with superior ion selectivity. Also, X-ray photoelectron spectroscopy (XPS) analysis of SPAEK/Ce2Zr2O7 (2%) composite membrane reveals the existence of a vanadium peak after 100 VRFB cycles. © 2018 The Royal Society of Chemistry.
- Royal Society of Chemistry
- Related Researcher
Advanced Energy Materials Laboratory
Electrocatalysts for fuel cells; water splitting; metal-air batteries; Polymer electrolyte membranes for fuel cells; flow batteries; Hydrogen generation and utilization
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- Department of Energy Science and EngineeringAdvanced Energy Materials Laboratory1. Journal Articles
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