Leak Proof / Water tight Gas Diffusion Layers

We have been getting more questions and requests regarding Gas Diffusion Layers (GDL) that are water proof or which do not allow water to seep or leak through them.  This is especially of interest when building Magnesium Air Batteries (also known as Magnesium Air Fuel Cells), Microbial Fuel Cells (MFC), and a host of other electrochemical reactions with a liquid electrolyte that needs access to gas or oxygen.Most GDL materials have a high air permeability that also results in at least some … [Read more...]

What is the Purpose of a Gas Diffusion Layer (GDL)?

The Gas Diffusion Layer (GDL) plays several critical roles in a typical fuel cell application and is often integrated as part of the Membrane Electrode Assembly (MEA). Typical applications that use GDLs consist of Polymer Electrolyte Fuel Cells (PEMFC) and Direct Methanol Fuel Cells (DMFC). When a GDL is coated with a catalyst it is than referred to as a Gas Diffusion Electrode (GDE), which are sometimes sold or installed separately from the Membrane or MEA.  Acting as an electrode is the easy … [Read more...]

Fuel Cells Etc. Announces ELAT™ Gas Diffusion Layer (GDL) is Back at a Fraction of the Cost

NuVant Systems has released ELAT™ LT-1400 Gas Diffusion Layer (GDL) back on to the market at a fraction of the cost while naming FuelCellsEtc as their sole distributor. The new price of ELAT is expected to make the product far more suitable in cost sensitive applications than it has ever been in the past. FuelCellsEtc will also be providing value added services of manufacturing catalyzed Electrodes (gas diffusion electrodes) and Membrane Electrode Assemblies (MEA) using ELAT.ELAT is a woven … [Read more...]

ELAT-1400 Gas Diffusion Layer (GDL) Not “Discontinued”

After the original manufacturer of ELAT Gas Diffusion Layer (GDL) stopped producing the material, many of the fuel cell industry had to scramble for replacements and were continuing their projects based on inventory already purchased.  We were no exception.  After a fair amount of searching and evaluation, we finally found a replacement that had very similar mechanical properties.So, for a number of years we educated our customers about the replacement as, well, a replacement for the … [Read more...]

What Gas Diffusion Layer (GDL) do I use for a Hydrogen Generator (Electrolyzer)?

We've spoken already about Gas Diffusion Layer (GDL) selection for a Fuel Cell; today we will cover some GDL considerations for Electrolyzers.The Hydrogen side (Cathode) of an Electrolyzer (EZ) can be almost any gas diffusion layer GDL (or even no GDL) that you would like and that fits your own mechanical design.  This can be common GDL materials like Toray Paper, Sigracet, Freudenberg, AvCarb, etc.  The Catalyst layer can either be applied to the membrane (as in a 3-layer or Catalyst Coated … [Read more...]

Why is Humidity / Moisture Control Important in a Fuel Cell?

The root of all of this is that Nafion membranes must stay hydrated to function properly. If they are not fully humidified the conductivity decreases and therefore more of the electricity is converted directly to heat before it leaves the membrane (I2R heating). If it gets too dry it basically stops functioning as a proton transporter.  All this sounds great since a Hydrogen Fuel Cell consumes Hydrogen and Oxygen to generate electricity and water, so you would think there should be plenty … [Read more...]