0.5 mm Porous Titanium Felt-Plate Composite Sheet (PTL/GDL)

Name: Titanium Felt-Plate Composite PTL/GDL Sheet | TOPTITECHS
Brand: TOPTITECHS
SKU: TT-5658
Availability: InStock

Diffusion-bonded composite of sintered titanium fiber felt and porous titanium plate, supplied as a 0.5 mm PTL/GDL sheet for PEM electrolyzers. The hybrid structure delivers bipolar conductivity, graded porosity for rapid bubble detachment, and oxidation-resistant performance up to 300°C — a drop-in upgrade over carbon paper GDLs.

Products Specifications

The 0.5 mm Porous Titanium Felt-Plate Composite Sheet combines a sintered titanium fiber felt layer (felt side) with a sintered porous titanium plate (plate side) by precision diffusion bonding. The result is a single 0.5 mm sheet that delivers bipolar conductivity, graded porosity for rapid bubble detachment, and stable mechanical support under stack clamping forces — a drop-in PTL/GDL upgrade over carbon paper for PEM electrolyzers.

Why a felt-plate composite?

Carbon paper GDLs oxidize and shed particles that contaminate PEM membranes. The monolithic titanium felt-plate composite keeps the corrosion resistance of titanium, while the diffusion-bonded interface prevents delamination under thermal cycling. The felt side optimizes interfacial contact with the catalyst; the plate side guarantees uniform current distribution and structural stability.

Key specifications

Parameter	Value
Material	GR1 titanium (felt + plate)
Standard size	100 × 100 mm (custom)
Total thickness	0.5 mm
Porous plate thickness	0.25 mm
Felt thickness	0.25 mm
Max service temperature	300 °C
Bonding	Diffusion bonded
Optional coatings	Platinum / iridium oxide (plasma spray)

Performance advantages

Bipolar conductivity — low charge-transfer resistance and uniform current distribution.
Oxidation-resistant for long service in oxygen-evolution anode environments.
Graded porosity for rapid bubble detachment at high current density.
Mechanical-thermal stability across thermal cycles.

Typical applications

Integrated gas diffusion electrode (GDE) in PEM electrolyzer stacks.
Drop-in replacement for nickel mesh in alkaline water electrolyzers.
SOEC interconnect component and chlor-alkali membrane cell substrate.
Reversible PEM fuel cell cathode-side diffusion media.

TOPTITECHS supplies titanium felt-plate composite sheets in custom sizes and with optional Pt/IrOx coatings. Send your active area and stack geometry for a fast quote.