A5004833590- Fuel Cells and Related Materials
- Electrocatalysts for Energy Conversion
- Advanced battery technologies research
- Conducting polymers and applications
- Membrane-based Ion Separation Techniques
- Advanced Battery Technologies Research
- Advanced Battery Materials and Technologies
- Advancements in Solid Oxide Fuel Cells
- Supercapacitor Materials and Fabrication
- Advancements in Battery Materials
- Water Quality Monitoring and Analysis
- Hybrid Renewable Energy Systems
- Catalytic Processes in Materials Science
- Ionic liquids properties and applications
- Catalysis and Oxidation Reactions
- Synthesis and properties of polymers
- Advanced Nanomaterials in Catalysis
- Electrospun Nanofibers in Biomedical Applications
- Electrochemical Analysis and Applications
- Thermal and Kinetic Analysis
- Hydrogen Storage and Materials
- Analytical Chemistry and Sensors
- Advanced Sensor and Energy Harvesting Materials
- Lubricants and Their Additives
Institut Charles Gerhardt Montpellier
2014-2024
École Nationale Supérieure de Chimie de Montpellier
2019-2023
Centre National de la Recherche Scientifique
2014-2023
Université de Montpellier
2014-2023
Institut de Chimie
2014-2019
International Council on Mining and Metals
2013
The incorporation of cerium and manganese ions in perfluorosulfonic acid (PFSA) membranes strongly decreases the fluoride ion emission rate from fuel cell membrane electrode assemblies through their scavenging reactive oxygen species generated during operation. Concentration gradients these water fluxes lead to migration even loss cell, but little is known about phenomena that nevertheless impact proton exchange durability. We have determined diffusion behavior find coefficient divalent be...
A perfluorosulfonic acid ionomer–cerium oxide nanofibre web integrated into an asymmetric composite membrane significantly reduces fuel cell degradation, especially with the modified surface placed at anode.
Mechanical and chemical stability of proton exchange membranes are crucial requirements for the development fuel cells durable energy conversion. To tackle this challenge, bi-functional nanoclays grafted with amino groups embedded radical scavengers, that is, CeO2 nanoparticles were incorporated into Aquivion® ionomer. The composite presented high conductivity increased to attack compared non-modified Aquivion membranes, demonstrating effectiveness approach based on scavenger immobilisation...
A new nanofiber-network material enriched with cerium oxide nanoparticles (NFCeO x ) has been developed as radical trap at the membrane electrode interface. Mitigation properties of NFCeO , oriented to anode side and cathode side, were investigated in situ OCV hold test conditions low relative humidity (50 %) high temperature (90 °C). The results testing under these show that whereas MEAs integrating non-modified Nafion ® -212, a marked drop time, end life < 200 hours, an MEA comprising...
Abstract Anion exchange membrane water electrolysis (AEMWE) for hydrogen production combines the advantages of proton and alkaline electrolysis. Several strategies have been adopted to improve performance AEMWE obtain membranes with high hydroxide ion conductivity, low gas permeation, durability. In this work AEMs reinforced poly[2,2’‐(p‐oxydiphenylene)‐5,5’‐benzimidazole] (PBIO) polymer fibres developed. A fibre web PBIO prepared by electrospinning was impregnated into poly(terphenylene)...
Radical terpolymerisations of perfluorintaed ω-cyano monomers, vinylidene fluoride and perfluoro(4-methyl-3,6-dioxaoct7-ene) sulfonyl are presented.
Many fuel cell membranes are highly heterogeneous systems comprising mechanical and chemical reinforcing components, including porous polymer sheets, nanofibers or nanoparticles, as well radical scavengers hydrogen peroxide decomposition catalysts. In the last 10 years, significant attention has been devoted to 1D nanomaterials obtained by electrospinning. Several chemistries compositions ranging from aliphatic aromatic polymers metal oxides phosphates morphologies nanotubes have employed...
Abstract not Available.
Membrane electrode assemblies developed for use with reformate and containing Pt/Ru (1:1) anode catalysts, have been submitted to a fuel starvation accelerated stress test (AST) protocol in combination range of different operation conditions The fuel-starved MEAs were aged under enabling investigation the effect temperature (65, 85 °C), current density (200, 400 mA/cm 2 ), relative humidity (40, 80% RH) number starvation/recovery cycles (up 875 cycles). characterized following AST using...
The incorporation of radical traps in the membrane or electrode a fuel cell MEA based on perfluorosulfonic acid (PFSA)type ionomers has emerged as an important development enabling much increased lifetime. Effective scavengers include transition metal ions and their oxides, particular cerium. We have developed novel nanofibre-networks comprising inorganic organic polymer trap materials for either within at interface MEAs long-side-chain (LSC) short-side-chain (SSC) PFSA membranes. were...
The attack by radical intermediates like hydroxy and hydroperoxy (∙OH, ∙OOH) radicals on the polymer chain is current generally accepted mechanism of chemical degradation perfluorosulfonic acid membranes [1]. formation reactive oxygen species (ROS) occurs through decomposition hydrogen peroxide in presence trace metal ions originating from corrosion cell components, including cathode platinum catalys [2,3]. Different approaches have been adapted to introduce scavenger into membrane electrode...
Within the past years, proton exchange membrane (PEM) fuel cells have become more and attractive due to their potential for transition towards an environmentally friendly hydrogen economy. Especially by reducing platinum catalyst loading, significant system cost reductions could be achieved, but low Pt loadings still lead unassigned voltage losses during operation. [1,2] In order overcome those losses, well-designed layers with optimized ionomer content distribution are indispensable. The...
The space for polymer electrolyte membrane fuel cell (PEMFC) systems the application especially in small cars is a limiting factor. Hence, high power density at current required to fulfill demand and requirements of system when installed into car. Additionally, operation elevated temperature supports this requirement facilitating smaller cooling systems. within EU funded project GAIA (next Generation AutomotIve electrode Assemblies), consortium leading OEMs, industrial partners...
Adequate material selection is one of the most important aspects in component design. Therefore, high-performance polymers have garnered significant interest for Proton Exchange Membrane Fuel Cell (PEMFC) and Water Electrolysis (WE) applications due to their exceptional mechanical, thermal, chemical properties. This 'beginning by design' strategy requires a deep knowledge environmental stressors degradation mechanisms focuses on proposing next-generation advanced materials able withstand...
The durability of ionomer membranes is an important factor affecting the lifetime proton exchange membrane fuel cells. Degradation causes performance losses that accelerate with time and result in catastrophic MEA failure. Membrane instability has two main origins mechanical fatigue chemical degradation. Both modes strongly depend on operating conditions applied: temperature, relative humidity, humidity cycling, reactant pressure, applied voltage properties membrane, mainly type equivalent...