Applications and Characteristics of Porous Titanium in Hydrogen Fuel Cells

Email us

Applications and Characteristics of Porous Titanium in Hydrogen Fuel Cells

I. Applications of Porous Titaniumin Hydrogen Fuel Cells

1. Gas Diffusion Layer (GDL)
   • Function: A core component for gas (hydrogen/oxygen) transport and water management in fuel cells.
   • Advantages:
     • High Porosity and Connectivity: Ensures uniform gas distribution to the catalyst layer, preventing local concentration polarization.
     • Corrosion Resistance: Superior long-term stability in acidic/alkaline electrolytes (e.g., proton exchange membrane fuel cells) compared to traditional carbon-based materials.
     • Mechanical Strength: Supports membrane electrode assemblies (MEAs) to prevent structural collapse.
   • Bipolar Plate
     • Function: Separates individual cells, conducts current, and distributes reactant gases.
     • Advantages:
       • Lightweight: Density is one-third that of graphite bipolar plates, significantly reducing fuel cell stack weight (critical for automotive applications).
       • High Conductivity: Surface conductivity exceeds 1000 S/cm, minimizing ohmic losses.
       • Corrosion Resistance: The TiO₂ passive layer resists acidic corrosion, extending service life.
     • Catalyst Support
       • Function: Loads noble metal catalysts (e.g., platinum, Pt) to enhance electrochemical activity.
       • Advantages:
         • High Surface Area: Porous structures increase active site exposure, improving catalyst utilization.
         • Stability: Titanium’s chemical inertness prevents carrier corrosion and catalyst detachment (unlike carbon supports, which degrade via oxidation).
         • Conductivity: Acts as a conductive backbone, reducing interfacial resistance.
       • Flow Field Plate
         • Function: Guides reactant gas flow and removes generated water.
         • Advantages:
           • Customizable Channel Designs: Complex flow channels (e.g., serpentine, interdigitated) via 3D printing optimize gas distribution and water removal.
           • High-Pressure Resistance: Strong porous titanium suits high-pressure fuel cell systems.