A5014651750- Fuel Cells and Related Materials
- Advanced Battery Materials and Technologies
- Membrane-based Ion Separation Techniques
- Electrocatalysts for Energy Conversion
- Conducting polymers and applications
- Advanced Battery Technologies Research
- Advanced battery technologies research
Centre National de la Recherche Scientifique
2019-2022
Aix-Marseille Université
2019-2022
University of Rome Tor Vergata
2019-2022
Matériaux Divisés, Interfaces, Réactivité, Electrochimie
2019
Laboratoire d’Electrochimie et de Physico-chimie des Matériaux et des Interfaces
2019
We study the effect of pendent methyl groups on alkaline stability model anion exchange polymers based poly(2,6-dimethyl-1,4-phenylene)oxide (PPO) with grafted trimethylammonium groups. The polymer backbone is modified varying synthesis procedure: by bromination route, ionomeric ammonium are inserted structural group PPO (Br-PPO-TMA), while chloromethylation route attached in ortho-position to (Cl-PPO-TMA). properties membranes studied NMR and FTIR spectroscopy, thermogravimetry, water...
The stability of anion exchange membranes is paramount for the use in alkaline fuel cells. Long-chain ionomers are supposed to be more alkaline-resistant with respect short-chain isomers. In this paper, synthesis, properties, and a long side chain investigated. Poly(2,6-dimethyl-1,4-phenylene)oxide (PPO) chosen as backbone because its reported conditions. functional group pentyl-ammonium trimethylamine (TMA) or 1,4-diazabicyclo[2.2.2]octane model amines. synthesis carried out via metalation...
We investigated the possibility to increase working temperature and endurance of proton exchange membranes for fuel cells water electrolyzers by thermal annealing short side chain perfluorosulfonic acid (SSC-PFSA) Aquivion® membranes. The Ionomer nc Analysis (INCA method), based on nc/T plots where is a counter elastic force index, was applied SSC-PFSA in order evaluate ionomer thermo-mechanical properties probe crystallinity during procedure. enhanced mechanical stability extruded 870...
We synthesized anion exchange polymers by a reaction of chloromethylated poly(2,6-dimethyl-1,4-phenylene)oxide (PPO) with strongly basic 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD). TBD contains secondary and tertiary amine groups in the guanidine portion. To favor functionalization amine, was activated butyl lithium. The yield formation via benzyl chloride moiety 85%. Furthermore, we prepared quaternary ammonium PPO-TBD CH3I. synthesis pathways ionomer structure were investigated NMR...
Abstract We studied composite anion exchange membranes made from poly(2,6‐dimethyl‐1,4‐phenylene oxide) (PPO) with grafted 1,4‐diazabicyclo[2.2.2]octane (DABCO) and Mg/Al lamellar double hydroxide particles as inorganic filler. The mechanical conductivity properties were measured in fully humidified conditions. activation energy for amounts to (0.20±0.01) eV. degradation of the anion‐exchange membrane 2 M NaOH at 60 °C was investigated during 168 h following ionic conductivity, water uptake,...
In this work we report the synthesis of new ionomer poly(alkylene biphenyl butyltrimethyl ammonium) (ABBA) with a backbone devoid alkaline-labile C-O-C bonds and quaternary ammonium groups grafted on long side chains. The was achieved by metalation reaction n-butyllithium 2-bromobiphenyl, followed introduction chain 1,4-dibromobutane. steps were 1H-NMR spectroscopy showing characteristic signals Br-butyl indicating complete functionalization moiety. precursor polycondensed...
In this work we report the synthesis of poly(vinylbenzylchloride-co-hexene) copolymer grafted with N,N-dimethylhexylammonium groups to study effect an aliphatic backbone without ether linkage on ionomer properties. The copolymerization was achieved by Ziegler-Natta method, employing complex ZrCl