Nanofibrillar Ionic Polymer Composites Enable High-Modulus Ion-Conducting Membranes
| Autor: | Maruti Hegde, Louis A. Madsen, Amar Kumbhar, Ryan J. Fox, Deyang Yu, Theo J. Dingemans |
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| Rok vydání: | 2019 |
| Předmět: |
chemistry.chemical_classification
Materials science Composite number Modulus Ionic bonding 02 engineering and technology Polymer Electrolyte 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Ion chemistry.chemical_compound Membrane chemistry Chemical engineering Ionic liquid General Materials Science 0210 nano-technology |
| Zdroj: | ACS applied materialsinterfaces. 11(43) |
| ISSN: | 1944-8252 |
| Popis: | Polymer electrolyte membranes (PEMs) with high volume fractions of ionic liquids (IL) and high modulus show promise for enabling next-generation gas separations, and electrochemical energy storage and conversion applications. Herein, we present a conductive polymer-IL composite based on a sulfonated all-aromatic polyamide (sulfo-aramid, PBDT) and a model IL, which we term a PBDT-IL composite. The polymer forms glassy and high-aspect-ratio hierarchical nanofibrils, which enable fabrication of PEMs with both high volume fractions of IL and high elastic modulus. We report direct evidence for nanofibrillar networks that serve as matrices for dispersed ILs using atomic force microscopy and small- and wide-angle X-ray scattering. These supramolecular nanofibrils form through myriad noncovalent interactions to produce a physically cross-linked glassy network, which boasts the best combination of room-temperature modulus (0.1-2 GPa) and ionic conductivity (8-4 mS cm |
| Databáze: | OpenAIRE |
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