Improvement in the mechanical properties, proton conductivity, and methanol resistance of highly branched sulfonated poly(arylene ether)/graphene oxide grafted with flexible alkylsulfonated side chains nanocomposite membranes
| Autor: | Zhuoyao Li, Lei Wang, Dong Liu, Bin Liu, Jinhua Peng |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Nanocomposite Renewable Energy Sustainability and the Environment Graphene Arylene Oxide Energy Engineering and Power Technology Proton exchange membrane fuel cell 02 engineering and technology Conductivity 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences law.invention chemistry.chemical_compound Direct methanol fuel cell Membrane chemistry Chemical engineering law Electrical and Electronic Engineering Physical and Theoretical Chemistry 0210 nano-technology |
| Zdroj: | Journal of Power Sources. 378:451-459 |
| ISSN: | 0378-7753 |
| Popis: | Sulfonated polymer/graphene oxide (GO) nanocomposites exhibit excellent properties as proton exchange membranes. However, few investigations on highly branched sulfonated poly(arylene ether)s (HBSPE)/GO nanocomposites as proton exchange membranes are reported. In order to obtain HBSPE-based nanocomposite membranes with better dispersibility and properties, a novel GO containing flexible alkylsulfonated side chains (SGO) is designed and prepared for the first time in this work. The HBSPE/SGO nanocomposite membranes with excellent dispersibility are successfully prepared. The properties of these membranes, including the mechanical properties, ion-exchange capacity, water uptake, proton conductivity, and methanol resistance, are characterized. The nanocomposite membranes exhibit higher tensile strength (32.67 MPa), higher proton conductivity (0.39 S cm−1 at 80 °C) and lower methanol permeability (4.89 × 10−7 cm2 s−1) than the pristine membrane. The nanocomposite membranes also achieve a higher maximum power density (82.36 mW cm−2) than the pristine membrane (67.85 mW cm−2) in single-cell direct methanol fuel cell (DMFC) tests, demonstrating their considerable potential for applications in DMFCs. |
| Databáze: | OpenAIRE |
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