VRFBs based on benzotriazole grafted polybenzimidazole / polymeric ionic liquid with high ion selectivity

Wang, Xiaorui; Wang, Shuang; Sun, Han; Li, Chenglong; Pan, Feng; Gao, Tongtong; Luo, Yi; Wang, Xiaojuan; Wang, Zhe

doi:10.1016/j.electacta.2023.142619

Cited by 2 publications

(2 citation statements)

References 48 publications

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“…The cross-sectional morphologies of sPBI and a series of composite membranes are displayed in Figure a–e. As is expected, all membranes have distinct fish-scale structures because polybenzimidazole is brittle . The MGE particles are evenly dispersed in the sPBI matrix and with the increase of MGE content, the MGE particles are slightly agglomerated, especially when the content of MGE is higher than 3 wt %.…”

Section: Resultssupporting

confidence: 53%

“…As is expected, all membranes have distinct fish-scale structures because polybenzimidazole is brittle. 31 The MGE particles are evenly dispersed in the sPBI matrix and with the increase of MGE content, the MGE particles are slightly agglomerated, especially when the content of MGE is higher than 3 wt %. The phenomenon is caused by van der Waals self-interaction between MOF particles.…”

Section: Characterizations Of Mgementioning

confidence: 94%

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High Proton Conductivity Membrane Based on Sulfonated Polybenzimidazole by Doping Ethylenediaminetetraacetic Acid-Modified MOF-808 for Vanadium Flow Battery

Gao,

Li,

Bai

et al. 2024

ACS Appl. Polym. Mater.

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The composite membrane (sPBI–MGE-x) is prepared by introducing MOF-808-grafted ethylenediaminetetraacetic acid (EDTA) into the sulfonated polybenzimidazole (sPBI) with a sulfonation degree of 50. MOF-808, one of Zr-based metal organic frameworks, has tunable pore size, plenty of pathways for proton transport, and superior acid stability. After MOF-808 is grafted by EDTA, the obtained MOF-808-EDTA (MGE) has the amino and carboxyl groups, which can provide additional proton transport channels and the acid–base pair effect between amino and sulfonic acid groups can further strengthen the interaction between MGE and sPBI. Therefore, compared with the pristine sPBI membrane (12.5 mS cm–1), the sPBI–MGE-2 composite membrane exhibits high proton conductivity (30.8 mS cm–1) and remarkable energy efficiency (83.81%) largely at 60 mA cm–2.

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Section: Resultssupporting

confidence: 53%

Section: Characterizations Of Mgementioning

confidence: 94%