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Open research questions in Fuel Cells and Related Materials

98 unresolved questions extracted from the limitations and future-work sections of 1,208 Fuel Cells and Related Materials papers in our library. Each links back to the study that raised it.

What the literature leaves open

  • Experimental validation of the computational model. Investigation of the effect of different operating conditions on the performance of the fuel cell. Optimization of the flow field design for improved efficiency and power density.

    Simulation through CFD of different flow field designs for enhancing proton exchange membrane fuel cell performance · 2026 · DOI

  • Achieving ultra-low hydrogen gas permeability - Long-term stability of polymer liners and composites - Scalable production methods for high-performance polymer liners and composites

    Recent Advances in the Hydrogen Gas Barrier Performance of Polymer Liners and Composites for Type IV Hydrogen Storage Tanks: Fabrication, Properties, and Molecular Modeling · 2025 · DOI

  • Exploring different ink formulations using the developed model and framework. Investigating the relationship between proton activity and concentration in the presence of suspended particles.

    Colloidal Stability of PFSA-Ionomer Dispersions Part II: Determination of Suspension pH Using Single-Ion Potential Energies · 2024 · DOI

  • The colloidal structure of fuel-cell catalyst layers is not well understood. The aggregation of PFSA ionomers in water/alcohol solutions and its relation to experimental measurements of solution pH is not well explored.

    Colloidal Stability of PFSA-Ionomer Dispersions Part II: Determination of Suspension pH Using Single-Ion Potential Energies · 2024 · DOI

  • The study did not investigate the long-term stability of the modified BC membrane. The study did not compare the performance of the modified BC membrane with other eco-friendly materials. The study was limited to a specific type of BC and APTES.

    A Sustainable and Eco-Friendly Membrane for PEM Fuel Cells Using Bacterial Cellulose · 2024 · DOI

  • Investigating the long-term stability of the modified BC membrane. Comparing the performance of the modified BC membrane with other eco-friendly materials. Exploring the potential applications of the modified BC membrane in biodegradable electronics and portable power supplies.

    A Sustainable and Eco-Friendly Membrane for PEM Fuel Cells Using Bacterial Cellulose · 2024 · DOI

  • The selection of essential components from high-dimensional data. The development of methods that can predict the properties and understand the mechanisms of hydrophilic polymer coatings. The need for methods that can handle diverse characteristics of RDKit and five pulse sequence data.

    Designing Sustainable Hydrophilic Interfaces via Feature Selection from Molecular Descriptors and Time-Domain Nuclear Magnetic Resonance Relaxation Curves · 2024 · DOI

  • The application of SE was limited by its associated dead time, - The linear approach of SVM-RFE might not have effectively classified the current dataset, - The study did not investigate the effects of other factors on the hydrophilic polymer coatings

    Designing Sustainable Hydrophilic Interfaces via Feature Selection from Molecular Descriptors and Time-Domain Nuclear Magnetic Resonance Relaxation Curves · 2024 · DOI

  • The impact of channel geometry on Proton Exchange Membrane Fuel Cell performance is not well understood. There is a need for a comprehensive computational model to explore this impact.

    Simulation through CFD of different flow field designs for enhancing proton exchange membrane fuel cell performance · 2026 · DOI

  • Key to this transition are the proton exchange Membrane Fuel Cells (PEMFCs); however, their stability in the long-term and water management ability is limited by the presence of suboptimal Microporous Layer (MPL) designs.

    Microporous layer (MPL) material structural modifications for enhanced efficiency and durability of proton exchange membrane fuel cells (PEMFCs): Toward sustainable maritime energy solutions · 2026 · DOI

  • Despite significant efforts to uncover the complex interplay of ion-ion, ion-water, and ion-pore interactions that give rise to these transport processes, the atomistic mechanisms of ion motion in confined electrolytes remain poorly understood.

    On the Physical Origins of Reduced Ionic Conductivity in Nanoconfined Electrolytes · 2025 · DOI

  • Finally, this review identifies gaps in the literature and outlines future research directions.

    Automotive PEM fuel cell catalyst layer degradation mechanisms and characterisation techniques, Part I: Carbon corrosion and binder degradation · 2025 · DOI

  • Although extensively reviewed, their applications within the Power-to-X framework—enabling the conversion of renewable hydrogen into sustainable molecules and facilitating their utilization—remain relatively underexplored.

    Membrane reactors technologies for e-fuel production & processing: A review · 2025 · DOI

  • • Few studies are available at process scale for chemical production with membrane reactor.

    Membrane reactors technologies for e-fuel production & processing: A review · 2025 · DOI

  • Future research should focus on developing multifunctional hybrid fillers, enhancing computational modeling frameworks, and designing novel polymer architectures specifically tailored for hydrogen storage applications.

    Recent Advances in the Hydrogen Gas Barrier Performance of Polymer Liners and Composites for Type IV Hydrogen Storage Tanks: Fabrication, Properties, and Molecular Modeling · 2025 · DOI

  • We examine key physical origins, the influence of salt chemistry and polymer structure, and open questions in measuring and controlling correlated motion.

    Dynamical Ion Correlations in Polymer and Membrane Electrolytes: Recent Advances and Open Questions · 2025 · DOI

  • Despite extensive research on PEMFCs, the transient thermal effects remain underexplored.

    Thermal Transient Performance of PEM Fuel Cells in Aerospace Applications: A Numerical Study · 2025 · DOI

  • However, the combined effects of variations in formulation parameters on the structure and properties of CLs in high-SC inks remain poorly understood, posing a challenge to further performance optimization.

    Effect of Solid Content and Ionomer-to-Carbon Ratio on High-Solid-Content Ink-Cast Catalyst Layers for PEM Fuel Cells · 2025 · DOI

  • High Resolution Image Download MS PowerPoint Slide Most reported anion exchange membrane water electrolyzers (AEMWEs) are currently limited to the usual 1–10 cm 2 electrodes in single-cell AEMWEs; however, accelerating its technology readiness level necessitates an explosive increment in unit sizes.

    Above and beyond the Lab Scale─Creating a kW-Sized AEM Electrolyzer Validated by In-Situ Distribution of Relaxation Times · 2025 · DOI

  • However, few studies have compared gas diffusion layers (GDLs) in PEMWE and PEMFC.

    Similarities and Differences between Gas Diffusion Layers Used in Proton Exchange Membrane Fuel Cell and Water Electrolysis for Material and Mass Transport · 2024 · DOI

  • The impact of these changes on the resulting fuel cell performance is not yet fully understood.

    Impact of the flow-field distribution channel cross-section geometry on PEM fuel cell performance: Stamped vs. milled channel · 2024 · DOI

  • The introduction of hydrophobic side chain structures in anion exchange membranes (AEMs) to facilitate ion transport has been widely studied; however, low or moderate hydrophobic hydrocarbon and semifluorinated side chains are insufficient to induce a high degree of microphase separation.

    Completely Methylene-Free Side Chain Enables Significant Microphase Separation at Medium IECs for Fuel-Cell Anion Exchange Membranes · 2024 · DOI

  • However, open issues remain to be addressed for PEMFC that hinder their widespread adoption, both on the technical side, such as too high operational temperature range, cell efficiency, and long-term stability, as well as on the industrial side with implementation issues, material and device component availability, and cost.

    Advancements in printed components for proton exchange membrane fuel cells: A comprehensive review · 2024 · DOI

  • However, the data on their structure/impact on PEMFC relationship is scarce, which complicates ranking of halocarbons in hydrogen quality standards.

    Detrimental impact of trace amount of tetrachlorohexafluorobutane impurity in hydrogen on PEM fuel cell performance · 2024 · DOI

  • Literature survey suggests that although several AI and ML models have been developed to swiftly predict some of the safety-related parameters for HFCs, the scarcity of HFC-related accidents and the consequent lack of data poses challenges for real-world development of safety protocols, including risk assessment, incorporating these AI models.

    Smart monitoring and control systems for hydrogen fuel cells using AI · 2024 · DOI

Most-cited papers in Fuel Cells and Related Materials

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98 open questions have been extracted from the limitations and future-work passages of 1,208 Fuel Cells and Related Materials papers in our 4.5M-paper local library. Each one below links back to the study that raised it, so you can read the original claim in context.

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