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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 Membrane

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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Fumasep FAS-PET-75
Fumasep FAS-PET-75 is a PET reinforced Anion Exchange Membrane (AEM) with low resistance, high se..
From $17.00

Nafion™ Tubing
Nafion™ tubing is a highly selective, semi-permeable membrane to water vapor. If gases inside Naf..
From $283.00
Based on 1 reviews.

Nafion™ 211
Nafion™ Membrane is used to separate the anode and cathode compartment of Proton Exchange Membran..
From $22.00
Based on 13 reviews.

Fumasep FAS-PET-130
Fumasep FAS-PET-130 is a PET (Polyester) reinforced Anion Exchange Membrane (AEM) with low resist..
From $18.00
Based on 1 reviews.

Nafion™ XL
Please note that Nafion™ XL has been discontinued by Chemours and only limited supplies are avail..
From $34.00
Based on 2 reviews.

Fumasep FKS-PET-130
Fumasep FKS-PET-130 is a PET reinforced Cation Exchange Membrane (CEM) with low resistance, high ..
From $19.00

Nafion™ 212
Nafion™ Membrane is used to separate the anode and cathode compartment of Proton Exchange Membran..
From $22.00
Based on 14 reviews.

Nafion™ NE1035
Please note that NE1035 has been discontinued by Chemours and only limited supplies are available..

Fumasep FAB-PK-130
Fumasep FAB-PK-130 is a PK reinforced Anion Exchange Membrane (AEM) with high proton blocking cap..
From $21.00
Based on 2 reviews.

Nafion™ 115
Nafion™ Membrane is used to separate the anode and cathode compartment of Proton Exchange Membran..
From $28.00
Based on 17 reviews.

Fumasep FKB-PK-130
Fumasep FKB-PK-130 is a PEEK reinforced Cation Exchange Membrane (CEM) with low resistance, high ..
From $21.00

Nafion™ 117
Nafion™ Membrane is used to separate the anode and cathode compartment of Proton Exchange Membran..
From $33.00
Based on 29 reviews.

Fumasep FKL-PK-130
Fumasep FKL-PK-130 is a PK reinforced Cation Exchange Membrane (CEM) with high hydroxyl blocking ..
From $21.00

Nafion™ 1110
Chemours (formerly DuPont) Nafion™ 1110 membranes are non-reinforced cation exchange membrane fil..
From $49.00
Based on 3 reviews.

Fumasep FBM - Bipolar Membrane
Fumasep FBM Bipolar Exchange Membrane with PK reinforcement consists of an anion exchange layer a..
$190.00
Based on 2 reviews.