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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) that are based on fluorinated polymer and sulfonic acid groups are used as a major membrane for Proton Exchange Membrane Fuel Cells (PEMFC) because of their excellent proton conductivity and durability. On the other hand, Anion Exchange Membranes (AEM) that are based on quaternary ammonium groups and hydrocarbon polymer backbone have been considered to have low thermal durability and low OH- conductivity under the condition of the fuel cell.

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Fumasep FAS-PET-75
Fumasep FAS-PET-75 is a PET reinforced Anion Exchange Membrane (AEM) with low resistance, high selec..
$87.00

Nafion HP
Nafion HP membranes are ultra-thin cation exchange membranes that are manufactured by the Chemour..
From $34.00

Nafion Tubing
Nafion tubing is a highly selective, semi-permeable membrane to water vapor. If gases inside Nafi..
From $260.00

Nafion 211
Nafion® Membrane is used to separate the anode and cathode compartment of Proton Exchange Membran..
From $21.00
Based on 4 reviews.

Fumasep FAS-PET-130
Fumasep FAS-PET-130 is a PET (Polyester) reinforced Anion Exchange Membrane (AEM) with low resistanc..
$87.00

Nafion XL
Nafion® XL membranes are newly developed reinforced membranes that enhance the chemical stability..
From $34.00

Fumasep FKS-PET-130
Fumasep FKS-PET-130 is a PET reinforced Cation Exchange Membrane (CEM) with low resistance, high sel..
$87.00

Nafion 212
Nafion® Membrane is used to separate the anode and cathode compartment of Proton Exchange Membran..
From $21.00
Based on 6 reviews.

Nafion NE1035
Nafion Membrane NE1035 is used to separate the anode and cathode compartment of Proton Exchange M..
From $28.00

Fumasep FAB-PK-130
Fumasep FAB-PK-130 is a PK reinforced Anion Exchange Membrane (AEM) with high proton blocking capa..
$116.00

Nafion 115
Nafion Membrane is used to separate the anode and cathode compartment of Proton Exchange Membrane..
From $27.00
Based on 6 reviews.

Fumasep FKB-PK-130
Fumasep FKB-PK-130 is a PEEK reinforced Cation Exchange Membrane (CEM) with low resistance, high s..
$116.00

Nafion 117
Nafion Membrane is used to separate the anode and cathode compartment of Proton Exchange Membrane..
From $35.00
Based on 15 reviews.

Fumasep FKL-PK-130
Fumasep FKL-PK-130 is a PK reinforced Cation Exchange Membrane (CEM) with high hydroxyl blocking cap..
$116.00

Nafion 1110
Chemours (formerly DuPont) Nafion® 1110 membranes are non-reinforced cation exchange membrane fil..
From $47.00