Product Overview
DiffuCarb™ E201c and DiffuCarb™ E221c are platinum-based gas diffusion electrodes for PEMFC research testing, membrane electrode assembly preparation, laboratory single-cell testing, and small-stack validation.
E201c uses a Pt/C catalyst system in which platinum nanoparticles are dispersed on a high-surface-area carbon support, offering good catalyst dispersion, electrical conductivity, and platinum utilization. E221c uses a Pt Black catalyst system, relying on the nanoscale structure of platinum black to provide abundant active sites for compact electrode structures or high-activity applications.
DiffuCarb® E201c
Pt/C catalyst electrode. Suitable for PEMFC systems requiring a balanced combination of performance, durability, platinum utilization, and cost control.
DiffuCarb® E221c
Pt Black catalyst electrode. Suitable for fuel cell applications requiring abundant active sites, higher platinum loading, or compact catalyst-layer structures.
Product Performance Parameter Comparison
| Item | DiffuCarb® E201c | DiffuCarb® E221c |
|---|---|---|
| Catalyst Type | Pt supported on high-surface-area carbon | Pt Black, high surface area |
| Catalyst Morphology | Platinum nanoparticles dispersed on carbon support | Pt Black aggregates, not supported on carbon |
| Specific Surface Area | High Depends on the carbon support structure and properties | Very High Provided by the nanoscale structure of Pt Black |
| Loading Range | 0.1–1.0 mg Pt/cm², customizable | 1–6 mg Pt/cm², customizable |
| Active-Layer Structure | Porous structure with well-dispersed Pt particles | Dense structure with stacked Pt Black particles |
| Gas Diffusion Layer GDL | SGL 22BB with MPL microporous layer | SGL 22BB with MPL microporous layer |
| Binder System | Nafion® ion-conductive polymer system | Nafion® ion-conductive polymer system |
| Main Advantages | Good dispersion, high conductivity, and high platinum utilization | More active sites and high catalytic activity even at lower loading |
| Application Scenarios | High-efficiency and medium-power fuel cells requiring good durability | Compact designs or applications sensitive to unit platinum performance |
| Structural Stability | Better Carbon support provides structural reinforcement | Slightly Lower May be more prone to aggregation or sintering |
| Customization Capability | High; adjustable Pt/C ratio, binder ratio, coating area, and loading | High; adjustable particle size, platinum loading, coating area, and electrode structure |
Common Features
Carbon Paper Substrate
Both electrodes use hydrophobic SGL 22BB carbon paper with an MPL microporous layer. The typical thickness is about 230 μm, providing good electrical conductivity, gas transport capability, and electrode support.
Nafion® Binder System
Nafion® dispersion is used as the ion-conductive polymer system, helping enhance ion transport in the catalyst layer and improve adhesion at the membrane electrode interface.
Designed for PEMFC Testing
Suitable for PEMFC single-cell testing, membrane electrode assembly preparation, small-stack screening, and research-grade fuel cell performance evaluation.
Supported Customization Options
Application Recommendation and Selection Guide
| Application Direction | Recommended Model | Reason |
|---|---|---|
| Automotive PEMFC | E201c | The catalyst layer structure is more stable and better suited for fuel cell systems requiring high durability. |
| Portable Fuel Cells | E221c | Rich active sites make it suitable for compact designs and applications requiring high specific power. |
| High-Power Experimental Stacks | E201c | Under optimized testing conditions, it can support higher current density and more stable power output. |
| Cost-Sensitive Projects | E201c | High platinum utilization and platinum loading as low as 0.1 mg/cm² help control material cost. |
Ordering Notice
Warm Reminder: If no special requirements are specified, SCI Materials Hub will provide the optimized standard gas diffusion electrode formulation by default to balance performance, structural stability, and cost-effectiveness.
Batch customization, active-area matching, MEA support, stack testing support, and fuel cell system development services are available.
Product Summary
DiffuCarb™ E201c and E221c are platinum-based gas diffusion electrodes for PEMFC applications. Both use hydrophobic SGL 22BB carbon paper, an MPL microporous layer, and a Nafion® ionomer binder system. E201c uses a Pt/C catalyst and is better suited for applications pursuing balanced performance, durability, and platinum utilization. E221c uses a Pt Black catalyst and is better suited for applications requiring abundant active sites, compact catalyst layers, or higher platinum loading.
