Perfluorosulfonic Acid PEM N-211 25μm Fuel Cell ATOMFAIR®

$285.00

Institutional Procurement & Supply Compliance: As a verified US supplier, Atomfair accepts formal institutional Purchase Orders (POs), contract billing schedules, and custom procurement loops for university and national laboratories, and corporate R&D departments globally.

Commercial-grade N-211 perfluorosulfonic acid PEM, 25 μm, 1 m × 1 m sheet, ≥0.100 S/cm conductivity and ePTFE reinforcement for fuel cells. Order now.

SKU: AF-MB-M-HFC0-PEM0-T025

Category: PEMFC

Brands: Atomfair®

N-211 Perfluorosulfonic Acid Proton Exchange Membrane for Hydrogen Fuel Cell

Product Type: Hydrogen Fuel Cell Proton Exchange Membrane

commercial grade product

Product Overview

N-211 is a 25 μm membrane with a basis weight of 50.0 g/m². The ePTFE reinforcement provides a well-balanced combination of mechanical strength and ionic conductivity.

The membrane is designed for hydrogen fuel cell applications that require a reinforced proton exchange membrane with controlled thickness, basis weight and electrochemical performance. The standard product size is 1 m x 1 m, equal to 1 m²; other dimensions should be confirmed separately before quotation.

Performance Features

Mid-Range Thickness: Provides 25 μm as a balanced option for diverse fuel cell stack designs.
Anisotropic-Strength: Delivers MD/TD tensile strength ≥40/≥28 MPa and modulus ≥350/≥400 MPa for directional load management.
High-MD Ductility: Maintains elongation ≥180% (MD) and ≥100% (TD) to accommodate assembly and operational stresses.
Stable-Ionic Conduction: Offers ≥0.100 S/cm for reliable proton transfer across varied conditions.
Standard-Square Footprint: Supplied as 1 m × 1 m (1 m²); other dimensions available upon email request.

Technical Specifications

Parameter	Specification / Available Values
Atomfair Model	AF-PEM-FC25
Standard Sheet Size	1 m x 1 m (1 m²)
Thickness	25 microns
Basis Weight	50.0 g/m²
Tensile Strength	≥28 MPa MD and ≥28 MPa TD
Elastic Modulus	≥400 MPa MD and ≥400 MPa TD
Elongation at Break	≥100% MD and ≥120% TD
Specific Gravity	1.97
Conductivity	≥0.100 S/cm
Water Content	5.0 +/- 3.0%
Water Uptake	50.0 +/- 5.0%

Specification Confirmation: Standard packaging ensures membrane protection during transit.

Quotation Support: For custom sizes, please include dimensions in your email inquiry.

LABORATORY PROCUREMENT SUPPORT

For model selection, application fit or configuration confirmation, contact our technical sales team.

E-MAIL: inquiry@atomfair.com

Manufacturer: Atomfair LLC

Brand: ATOMFAIR®

How does the ePTFE reinforcement in the N-211 membrane affect the trade-off between mechanical strength and ionic conductivity?

The ePTFE reinforcement provides a well-balanced combination of mechanical strength and ionic conductivity. The membrane achieves a tensile strength of ≥28 MPa in both MD and TD and a modulus of ≥400 MPa, while maintaining a proton conductivity of ≥0.100 S/cm. This reinforcement allows the 25 μm membrane to withstand directional loads without compromising the ionic conduction required for fuel cell performance.

What water management considerations are critical for maintaining the N-211 membrane's proton conductivity?

The N-211 membrane has a water content of 5.0 ± 3.0% and a water uptake of 50.0 ± 5.0%. Proper hydration is essential to sustain the perfluorosulfonic acid groups' proton transfer, as conductivity is rated ≥0.100 S/cm. Operating conditions must avoid excessive drying or flooding to maintain the water balance that directly supports ionic conduction.

What is the significance of the anisotropic tensile strength specifications for the N-211 membrane in a fuel cell stack?

The membrane exhibits MD elongation ≥100% and TD elongation ≥120%, with tensile strength ≥28 MPa in both directions. These anisotropic properties allow it to accommodate directional stresses during stack assembly and thermal cycling, reducing the risk of mechanical failure. The higher TD elongation helps manage transverse strains, while the MD strength ensures robust longitudinal load handling.

Assessment

Atomfair N-211 is a 25 μm ePTFE-reinforced perfluorosulfonic acid proton exchange membrane (model AF-PEM-FC25) offering balanced mechanical strength and ionic conductivity (≥0.100 S/cm) for hydrogen fuel cell applications. Its anisotropic tensile properties and high MD elongation facilitate integration into stack designs, while standard sheet size and hydration requirements impose operational considerations.

Positive

ePTFE reinforcement for balanced performance: The ePTFE reinforcement provides a well-balanced combination of mechanical strength and ionic conductivity, enabling reliable operation in fuel cell stacks.
High MD ductility for stress accommodation: Elongation at break ≥180% (MD) and ≥100% (TD) allows the membrane to accommodate assembly and operational stresses, reducing risk of mechanical failure.

Trade-offs

Hydration-dependent performance: Water content (5.0±3.0%) and water uptake (50.0±5.0%) indicate that ionic conductivity and mechanical properties require precise humidity control during storage and operation.
Standard sheet size constraint: Supplied as 1 m × 1 m (1 m²); custom dimensions require separate quotation, potentially limiting integration into non-standard stack geometries.

Quality Standards & Performance Verification

Every advanced material, component, equipment, and instrument in our catalog is backed by rigorous testing. We maintain strict internal quality management frameworks and align with CE conformity metrics to deliver transparent, reproducible performance data via our public open-science repository.

To request raw batch performance data, submit formal vendor registration paperwork, or execute a fast-turnaround R&D manufacturing loop, contact us at inquiry@atomfair.com.

Shipping & Returns

Item is dispatched under the Atomfair Shipping & Delivery Framework (Free worldwide shipping on orders over $59 USD excl. heavy equipment). Return is governed by the Atomfair Return & Refund Policy (7-day technical return window).