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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 FBM - Bipolar Membrane
Fumasep FBM Bipolar Exchange Membrane with PK reinforcement consists of an anion exchange layer a..
$190.00
Based on 1 reviews.

Nafion N324, Teflon Fabric Reinforced
Chemours' (formerly DuPont) Nafion® N-324 is a perfluorosulfonic acid cation exchange membrane co..
From $73.00
Based on 1 reviews.

Nafion R-1000 Precursor Beads
Chemours (formerly DuPont) Resins are perfluorinated polymers used to manufacture ion-exchange me..
From $145.00

Fumasep FKS-30
Fumasep FKS-30 is a non-reinforced Cation Exchange Membrane (CEM) with very low resistance, high sel..
$72.00
Based on 1 reviews.

Nafion N424, Teflon Fabric Reinforced
Chemours' (formerly DuPont) Nafion® N-424 is a perfluorosulfonic acid cation exchange membrane co..
From $80.00
Based on 1 reviews.

Nafion R-1100 Precursor Beads
Chemours (formerly DuPont) Resins are perfluorinated polymers used to manufacture ion-exchange me..
From $112.00

Fumasep FAS-30
Fumasep FAS-30 is a non-reinforced Anion Exchange Membrane (AEM) with very low resistance, high sele..
$72.00
Based on 1 reviews.

Nafion N438, Teflon Fabric Reinforced
Chemours (formerly DuPont) Nafion® N438 is a new product in the 400 series family. This membrane ..
From $86.00

Nafion NR40 Polymerbeads
Chemours (formerly DuPont) Nafion® PFSA Superacid Resin is a bead-form, strongly acidic resin dev..
From $145.00

Fumasep FKS-50
Fumasep FKS-50 is a non-reinforced Cation Exchange Membrane (CEM) with very low resistance, high sel..
$72.00

Nafion Membrane Kit
Our Nafion Membrane Kits consist of one piece of each of the following Nafion membranes: • Na..
From $44.00
Based on 1 reviews.

Nafion N2100TX
Nafion N2100 is the latest development in the high strength family of membranes offered by Chemou..
From $295.00

Nafion NR50 Polymerbeads
Chemours (formerly DuPont) Nafion® PFSA Superacid Resin is a bead-form, strongly acidic resin develo..
From $112.00

Fumasep FAS-50
Fumasep FAS-50 is a non-reinforced Anion Exchange Membrane (AEM) with very low resistance, high sele..
$72.00

Porex PM21M
Porex is a micro-expanded PTFE product that allows gasses to permeate but has a high barrier for ..
From $17.00
Based on 1 reviews.