Description

<h3>Overview</h3>
<p>
20-A3, 20-A6H and 20-A6L are carbon paper gas diffusion layer (GDL) materials designed for PEM fuel cells, water electrolyzers and related hydrogen energy systems. Belonging to the same 250 µm carbon paper family, these grades combine stable conductivity, controlled porosity and hydrophobic surface characteristics for reliable gas transport and stack integration. Within this series, 20-A3 features a 30% MPL PTFE level, while 20-A6H and 20-A6L offer lower electrical resistance and refined surface roughness for applications requiring balanced conductivity and gas diffusion performance.
</p>

<h3>Key Features</h3>
<ul>
<li>250 µm carbon paper GDL for PEM fuel cells and water electrolyzers</li>
<li>Available in three grades: 20-A3, 20-A6H and 20-A6L</li>
<li>Controlled MPL and fiber surface roughness for component matching</li>
<li>Hydrophobic PTFE-treated structure with high contact angle</li>
<li>Porosity of ≥ 73% across the series</li>
<li>Low electrical resistance, down to ≤ 10 mΩ·cm²</li>
<li>Suitable for research, pilot-scale testing and industrial hydrogen applications</li>
</ul>

<h3>Technical Specifications</h3>
<table class=”table table-bordered table-striped table-hover align-middle”>
<thead>
<tr>
<th>Property</th>
<th>20-A3</th>
<th>20-A6H</th>
<th>20-A6L</th>
<th>Unit</th>
</tr>
</thead>
<tbody>
<tr>
<td>Product Type</td>
<td>Carbon paper GDL</td>
<td>Carbon paper GDL</td>
<td>Carbon paper GDL</td>
<td>—</td>
</tr>
<tr>
<td>Areal Weight</td>
<td>95 ± 10</td>
<td>100 ± 10</td>
<td>100 ± 10</td>
<td>g/m²</td>
</tr>
<tr>
<td>Thickness</td>
<td>250 ± 20</td>
<td>250 ± 20</td>
<td>250 ± 20</td>
<td>µm</td>
</tr>
<tr>
<td>Surface Roughness (MPL)</td>
<td>&lt; 8</td>
<td>&lt; 6</td>
<td>&lt; 6</td>
<td>µm</td>
</tr>
<tr>
<td>Surface Roughness (Fiber)</td>
<td>&lt; 25</td>
<td>&lt; 20</td>
<td>&lt; 20</td>
<td>µm</td>
</tr>
<tr>
<td>PTFE Content (MPL)</td>
<td>30</td>
<td>≥ 25</td>
<td>23–25</td>
<td>%</td>
</tr>
<tr>
<td>PTFE Content (GBDL)</td>
<td>10 ± 5</td>
<td>10 ± 5</td>
<td>10 ± 5</td>
<td>%</td>
</tr>
<tr>
<td>Contact Angle (MPL)</td>
<td>≥ 145</td>
<td>≥ 145</td>
<td>≥ 140</td>
<td>°</td>
</tr>
<tr>
<td>Contact Angle (Fiber)</td>
<td>≥ 145</td>
<td>≥ 145</td>
<td>≥ 145</td>
<td>°</td>
</tr>
<tr>
<td>Porosity</td>
<td>≥ 73</td>
<td>≥ 73</td>
<td>≥ 73</td>
<td>%</td>
</tr>
<tr>
<td>Compression Set</td>
<td>≤ 15</td>
<td>≤ 15</td>
<td>≤ 15</td>
<td>µm</td>
</tr>
<tr>
<td>Electrical Resistance</td>
<td>≤ 15</td>
<td>≤ 10</td>
<td>≤ 10</td>
<td>mΩ·cm²</td>
</tr>
<tr>
<td>TP Air Permeability (Fresh)</td>
<td>2.0 ± 2.0</td>
<td>—</td>
<td>—</td>
<td>cm²/cm²·s</td>
</tr>
</tbody>
</table>

<h3>Applications</h3>
<ul>
<li>PEM fuel cells</li>
<li>Water electrolyzers</li>
<li>Hydrogen energy systems</li>
<li>Gas diffusion layer and stack component integration</li>
<li>Research, pilot testing and industrial evaluation</li>
</ul>

<h3>Commercial Note</h3>
<p>
Prices shown on this page are indicative reference prices and may vary depending on quantity, packaging format and market conditions. Listed prices exclude VAT, shipping and any custom cutting or packaging services. Bulk orders, customized dimensions and distributor cooperation are available upon request. Please contact us for detailed quotations and technical support.
</p>