High-performance polymer electrolyte membranes incorporated with 2D silica nanosheets in high-temperature proton exchange membrane fuel cells
| Autor: | Rongsheng Cai, Stuart M. Holmes, Sarah J. Haigh, Madhumita Sahoo, Zhaoqi Ji, Jianuo Chen, Zunmin Guo, Maria Perez-Page, Jae Jong Byun |
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| Rok vydání: | 2022 |
| Předmět: |
chemistry.chemical_classification
Materials science Energy Engineering and Power Technology Proton exchange membrane fuel cell 02 engineering and technology Polymer Electrolyte Conductivity 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Exfoliation joint Silane 0104 chemical sciences chemistry.chemical_compound Fuel Technology Membrane Chemical engineering chemistry Electrochemistry Surface modification 0210 nano-technology Energy (miscellaneous) |
| Zdroj: | Journal of Energy Chemistry. 64:323-334 |
| ISSN: | 2095-4956 |
| Popis: | Silica nanosheets (SN) derived from natural vermiculite (Verm) were successfully incorporated into polyethersulfone–polyvinylpyrrolidone (PES–PVP) polymer to fabricate high–temperature proton exchange membranes (HT–PEMs). The content of SN filler was varied (0.1–0.75 wt%) to study its influence on proton conductivity, power density and durability. Benefiting from the hydroxyl groups of SN that enable the formation of additional proton–transferring pathways, the inorganic–organic membrane displayed enhanced proton conductivity of 48.2 mS/cm and power density of 495 mW/cm2 at 150 °C without humidification when the content of SN is 0.25 wt%. Furthermore, exfoliated SN (E–SN) and sulfonated SN (S–SN), which were fabricated by a liquid–phase exfoliation method and silane condensation, respectively, were embedded in PES–PVP polymer matrix by a simple blending method. Due to the significant contribution from sulfonic groups in S–SN, the membrane with 0.25 wt% S–SN reached the highest proton conductivity of 51.5 mS/cm and peak power density of 546 mW/cm2 at 150 °C, 48% higher than the pristine PES–PVP membranes. Compared to unaltered PES–PVP membrane, SN added hybrid composite membrane demonstrated excellent durability for the fuel cell at 150 °C. Using a facile method to prepare 2D SN from natural clay minerals, the strategy of exfoliation and functionalization of SN can be potentially used in the production of HT–PEMs. |
| Databáze: | OpenAIRE |
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