SulfoMg organophyllosilicate − infused nafion membranes: overcoming hydration and stability challenges in HT-PEMFCs
Year: 2025
Type: article
Abstract: High-temperature Proton Exchange Membrane Fuel Cells (HT-PEMFCs) are crucial for advancing hydrogen energy technologies, particularly in automotive applications. This study introduces sulfo-functionalized magnesium organophyllosilicate (SulfoMgPS) as a novel nanofiller for enhancing Nafion-based hybrid membranes. SulfoMgPS nanoparticles, synthesized via a co-condensation method, exhibit a unique layered structure with sulfonic acid (-SO₃H) groups grafted onto brucite-like layers. These nanoparticles demonstrate exceptional hydrophilicity, with water uptake reaching 252% at 100% RH, and a high ion exchange capacity of 12.5 mmol g⁻¹, supporting efficient proton conduction through the Grotthuss mechanism.Incorporating SulfoMgPS into Nafion produced nanocomposite membranes with remarkable structural and functional properties. Hybrid membrane with 3% of filler loading (N-L3) achieved exceptional proton conductivity, up to sevenfold greater than filler-free Nafion under low humidity (30% RH) across 30–120°C. Single-cell tests revealed peak power densities of 1100 mW cm⁻² under 100% RH and 800 mW cm⁻² under 25% RH and 110 °C, outperforming many benchmarks. These results highlight the potential of SulfoMgPS nanofillers to overcome dehydration and thermal stability challenges in HT-PEMFCs, meeting stringent DOE targets for efficiency and durability.
Source: Chemical Engineering Journal
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $4,830
OpenAlex ID: W4409583480