Urushi/Nafion Hybrid Membranes for an All-Vanadium Redox Flow Battery

Title
Urushi/Nafion Hybrid Membranes for an All-Vanadium Redox Flow Battery
Authors
황승상Jiyoon JungEun Hae ChoJongok Won
Issue Date
2018-06
Publisher
ChemistrySelect
Citation
VOL 3, NO 21-5777
Abstract
An urushi/Nafion hybrid membrane is prepared via a thermalin situ crosslinking reaction of natural urushiol to reduce thecrossover of vanadium ions in an all vanadium redox flowbattery (RFB). The ionic channel of the Nafion is blocked by theurushi, a crosslinked natural polymer formed by the polymer-ization of the adsorbed urushiol. Urushi, which has highchemical robustness in acid solution, is well-formed within thevolume of the ion cluster, and the presence of urushi inside theNafion membrane is confirmed. The permeability and swellingdecrease with increasing urushi in the hybrid membrane. TheRFB with a hybrid membrane has higher efficiency than theRFB with Nafion. The coulombic and energy efficiencies are95% and 91%, respec tively, for the membrane containing3.2 wt% of urushi at 11.1 mA cm? 2, suggesting that the urushiin the hybrid membrane can suppress vanadium ion crossover.The chemical and mechanical strengths are maintained inFenton reagent, which enables long-term use of hybridmembranes to operate the RFB in strong acid solutions. Theseresults suggest that the urushi/Nafion membrane with achemically stable urushi inside the ion channel enables thesuccessful use of all vanadium RFB as an energy storagesystem
URI
http://pubs.kist.re.kr/handle/201004/69762
ISSN
2365-6549
Appears in Collections:
KIST Publication > Article
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