New crosslinked membranes based on cardo-poly(etherketone) and poly(ethylene imine) for the vanadium redox flow battery
| Autor: | Jingshuai Yang, Xuefu Che, Shifan Leng, Weiqin Tang, Yaping Jin, Ruihong Liu, Jianguo Liu |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
chemistry.chemical_classification
Polymers and Plastics Organic Chemistry Imine technology industry and agriculture Synthetic membrane General Physics and Astronomy Vanadium chemistry.chemical_element macromolecular substances Sulfonic acid Flow battery chemistry.chemical_compound Membrane chemistry Chemical engineering Nafion Materials Chemistry Macromolecule |
| Zdroj: | European Polymer Journal. 161:110858 |
| ISSN: | 0014-3057 |
| Popis: | Developing polymer membranes with low cost, high ionic conduction and low vanadium ion permeability simultaneously for the vanadium redox flow battery (VRFB) is a huge challenge to macromolecule design and engineering. Herein, a series of high-performance and low-cost macromolecule cross-linked membranes for VRFB are synthesized from cardo-poly(etherketone) (PEKC) and poly(ethylene imine) (PEI) through a straightforward lactamization reaction between the primary amines in PEI and lactones in PEKC. Owing to the acid-base interaction between amino groups of PEI and sulfonic acid (SA), crosslinked x%PEI-PEKC membranes exhibit excellent SA adsorption capability and low area resistance. Meanwhile, the formed macromolecule multi-crosslinked networks significantly improve the membrane-forming property of PEI and endow membranes with superior mechanical rigidity and low vanadium ion permeability simultaneously. Consequently, the 50%PEI-PEKC membrane exhibit a nearly 90 times higher ion selectivity of 24.71 × 105 S min cm−3 than Nafion 115. The assembled VRFB with 50%PEI-PEKC displays higher battery efficiencies than Nafion 115 at 60–160 mA cm−2, which also possesses superior cycling stability at 100 mA cm−2. |
| Databáze: | OpenAIRE |
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