Jung, Jiyoon Cho, Eun Hae Hwang, Seung Sang Won, Jongok 2024-01-19T22:32:13Z 2024-01-19T22:32:13Z 2021-09-03 2018-06-07 2365-6549 https://pubs.kist.re.kr/handle/201004/121257 An urushi/Nafion hybrid membrane is prepared via a thermal insitu crosslinking reaction of natural urushiol to reduce the crossover of vanadium ions in an all vanadium redox flow battery (RFB). The ionic channel of the Nafion is blocked by the urushi, a crosslinked natural polymer formed by the polymerization of the adsorbed urushiol. Urushi, which has high chemical robustness in acid solution, is well-formed within the volume of the ion cluster, and the presence of urushi inside the Nafion membrane is confirmed. The permeability and swelling decrease with increasing urushi in the hybrid membrane. The RFB with a hybrid membrane has higher efficiency than the RFB with Nafion. The coulombic and energy efficiencies are 95% and 91%, respectively, for the membrane containing 3.2 wt% of urushi at 11.1 mA cm(-2), suggesting that the urushi in the hybrid membrane can suppress vanadium ion crossover. The chemical and mechanical strengths are maintained in Fenton reagent, which enables long-term use of hybrid membranes to operate the RFB in strong acid solutions. These results suggest that the urushi/Nafion membrane with a chemically stable urushi inside the ion channel enables the successful use of all vanadium RFB as an energy storage system. English WILEY-V C H VERLAG GMBH ELECTROLYTE MEMBRANE COMPOSITE MEMBRANES PROTON CONDUCTIVITY CELL APPLICATIONS NAFION MEMBRANE TRANSPORT POLYMERIZATION METHANOL WATER MORPHOLOGY Urushi/Nafion Hybrid Membranes for an All-Vanadium Redox Flow Battery Article 10.1002/slct.201800020 1 CHEMISTRYSELECT, v.3, no.21, pp.5769 - 5777 CHEMISTRYSELECT 3 21 5769 5777 scie scopus 000434412700010 2-s2.0-85048342670 Chemistry, Multidisciplinary Chemistry Article ELECTROLYTE MEMBRANE COMPOSITE MEMBRANES PROTON CONDUCTIVITY CELL APPLICATIONS NAFION MEMBRANE TRANSPORT POLYMERIZATION METHANOL WATER MORPHOLOGY electrolyte membrane aqueous redox flow battery Nafion urushi vanadium