Acid resistant PVDF-co-HFP based copolymer proton exchange membrane for electro-chemical application
| Autor: | Divesh N. Srivastava, Tatiana V. Raskulova, O. V. Lebedeva, Vaibhav Kulshrestha, Alexandra Chesnokova, Prem P. Sharma, Swati Gahlot, Vikrant Yadav |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Proton exchange membrane fuel cell Vanadium chemistry.chemical_element Filtration and Separation 02 engineering and technology Conductivity 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences Biochemistry Electrochemical energy conversion 0104 chemical sciences Membrane chemistry Chemical engineering Copolymer Ionic conductivity General Materials Science Physical and Theoretical Chemistry 0210 nano-technology |
| Zdroj: | Journal of Membrane Science. 573:485-492 |
| ISSN: | 0376-7388 |
| Popis: | Acid resistant proton exchange membranes (PEMs) are synthesized from aliphatic highly hydrophobic polyvinylidene-co-hexafluoropropylene (PVDF-co-HFP) and aromatic hydrophilic sodium-p-styrene sulfonate at nanostructure level modification. Synthesized copolymer PEMs are analyzed for their chemical structure to confirm the presence of functional groups. Electrochemical characterizations are carried out in terms ion-exchange capacity, ionic conductivity and water content. Maximum IEC value 1.91 meq/gm is observed for PDSt-40 copolymer PEM with 1.58 × 10−2 S/cm proton conductivity and 29.1% of water content. Vanadium ion permeability is also checked for copolymer membranes in terms of applicability for vanadium redox flow batteries. PDSt-40 copolymer PEM shows lowest value of VO2+ ion permeability 2.87 × 10−7 cm2 min−1, which is about 40% less compared to Nafion membrane. Further all synthesized PEMs are checked for charging-discharging performance for single cell VRFB. PDSt-40 PEM shows better performance in term of columbic and voltage efficiency. Copolymer membranes found to be stable thermally and mechanically and also in harass condition with 18 M H2SO4 for 24 h. Results indicate that synthesized copolymer PEMs can be a good candidate for electrochemical energy systems as well as high temperature applications. |
| Databáze: | OpenAIRE |
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