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Membranes

In order for a PEM fuel cell to operate, a Proton Exchange Membrane is needed that will carry the hydrogen ions, proton, from the anode to the cathode without passing the electrons that were removed from the hydrogen atoms. These polymer membranes that conduct proton through the membrane but are reasonably impermeable to the gases, serve as solid electrolytes (vs. liquid electrolyte) for variety of electrochemical applications, and are commonly known as Proton Exchange Membrane and/or Polymer Electrolyte Membranes (PEM). These membranes have been identified as one of the key components for various consumer related applications for fuel cells, e.g. automobiles, back-up power, portable power etc. Due to its application for many consumer markets, the technology keeps on evolving to make these membranes suitable for longer duration, and even high temperature operations.

For PEM fuel cell and electrolyzer applications, a polymer electrolyte membrane is sandwiched between an anode electrode and a cathode electrode. During electrochemical reaction, oxidation reaction at the anode generates protons and electrons; reduction reaction at the cathode combines protons and electrons with oxidants to generate water. To complete the electrochemical reaction, the proton exchange membrane plays a critical role that conducts protons from anode to cathode through the membrane. The proton exchange membrane also performs as a separator for separating anode and cathode reactants in fuel cells and electrolyzers.

Main Types of Fuel Cell Ion Exchange Membranes

 • Cation Exchange Membrane (CEM)
 • Anion Exchange Membrane (AEM)
 • Bipolar Membranes
 • Chlor-alkali Production Membranes

Whats is the Difference Between Cation and Anion Exchange Membranes?
Cation Exchange Membranes (CEM) are usually comprised of a fluorinated polymer with sulfonic acid sites and have excellent ionic conductivity and thermal/chemical durability. Currently manufactured Anion Exchange Membranes (AEMs) can utilize various alkaline stable polymeric materials as the host material and come with various functional sites that conducts OH- or any other anionic species.  Thermal/chemical durability of AEMs are in general lower compared to its CEM counterparts.

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ePTFE Reinforced PFSA Membrane (80 microns thick) for PEM Electrolyzers
ePTFE Reinforced PFSA Membrane (80 microns thick) for PEM Electrolyzers is used to separate the a..
From $183.00

ePTFE Reinforced PFSA Membrane (80 microns thick, Pt impregnated) for PEM Electrolyzers
ePTFE Reinforced PFSA Membrane (80 microns thick, Pt impregnated) for PEM Electrolyzers is used t..
From $226.00

ePTFE Reinforced PFSA Membrane (110 microns thick) for PEM Electrolyzers
ePTFE Reinforced PFSA Membrane (110 microns thick) for PEM Electrolyzers is used to separate the ..
From $233.00

ePTFE Reinforced PFSA Membrane (110 microns thick, Pt impregnated) for PEM Electrolyzers
ePTFE Reinforced PFSA Membrane (110 microns thick, Pt impregnated) for PEM Electrolyzers is used ..
From $264.00

PurionX -111 Mechanically Reinforced Anion Exchange Membrane - (8"x8")
General Information:  PurionX™-111 is a mechanically reinforced Anion Exchange Memb..
$159.00
Based on 1 reviews.

GI-N417 PTFE Fabric Reinforced Perfluorosulfonic Acid (PFSA) Membrane
GI-N417 PTFE fabric reinforced membrane is a perfluorosulfonic acid (PFSA) cation exchange membra..
From $107.00
Based on 2 reviews.

Sustainion® E28-50 Grade T
20 cm x 28 cm sheets of Sustainion® Alkaline Anion Exchange Membrane E28-50 with PTFE support for ..
$713.00

Sustainion® B22-50 Grade T
20 cm x 28 cm sheets of Sustainion® Alkaline Anion Exchange Membrane B22-50 with PTFE support for..
$713.00

Sustainion® E30-50 Grade T
20 cm x 28 cm sheets of Sustainion® Alkaline Anion Exchange Membrane E30-50 with PTFE support for..
$713.00

Sustainion® Anion Exchange Membrane Variety Kit
Our Sustainion Anion Exchange Membrane Variety Kit consists of one 4cm x 4cm piece of each of the ..
$350.00

PTFE Porous Mesh - 30.5 x 30.5cm
These PTFE porous mesh products are manufactured by slitting plastic sheet stock in a controlled ..
From $75.00

Polypropylene (PP) Porous Mesh - 30.5 x 30.5cm
Polypropylene (PP), is a thermoplastic polymer providing good chemical and heat resistance at a r..
From $41.00

iPEM - High Temperature Polymer Electrolyte Membrane
Please note that this material has been discontinued. Polycation-PBI based iPEM Membrane: ..

Celtec - P Membrane for High Temperature PEM Fuel Cells
Celtec®-P Membrane For High Temperature PEM Fuel Cells: BASF has been manufacturing Celtec-P mem..
$157.00
Based on 1 reviews.

Tion5-W PFSA Membrane
Tion5-W is PFSA (perfluorosulfonic acid) resin based cation exchange membrane with a thickness of..
From $38.00