Porimionr High-Current-Density Flow Battery Membrane
Developed from an innovative non-fluorinated polybenzimidazole (PBI) resin system, this ion-exchange membrane is specifically engineered for high-current-density flow battery stacks. It offers enhanced mechanical strength and puncture resistance, delivering energy efficiency surpassing that of perfluorinated proton exchange membranes. The membrane is well suited for vanadium, titanium–bromine and acidic flow battery chemistries. Its excellent vanadium-ion blocking capability significantly reduces self-discharge and improves coulombic efficiency during vanadium battery operation, effectively addressing the high self-discharge issue in fast-response frequency-regulation applications. This advancement is expected to accelerate the deployment of vanadium flow batteries in regulation services.
• High Strength & Ultra-Thin • High Selectivity • Low Self-Discharge • High Reliability • Environmentally Friendly
TEST PERFORMANCE
Performance comparison between the Porimion® flow battery membrane and PFSA membranes in a 1 kW vanadium flow battery stack.
| Power Density (mW/cm²) | PBI Membrane | PFSA Membrane 1 | PFSA Membrane 2 | ||||||
|---|---|---|---|---|---|---|---|---|---|
| CE(%) | VE(%) | EE(%) | CE(%) | VE(%) | EE(%) | CE(%) | VE(%) | EE(%) | |
| 120 | 99.6 | 88.9 | 88.5 | 96.2 | 87.8 | 84.4 | 95.6 | 88.4 | 84.6 |
| 150 | 99.7 | 86.6 | 86.1 | 96.0 | 85.1 | 81.7 | 95.8 | 85.6 | 82.0 |
| 180 | 99.6 | 83.9 | 83.5 | 96.2 | 82.4 | 79.2 | 96.0 | 82.8 | 79.5 |
| 210 | 99.6 | 82.3 | 82.0 | 96.2 | 80.7 | 77.6 | 96.0 | 82.7 | 77.5 |
| 240 | 99.6 | 81.3 | 81.0 | 96.2 | 79.0 | 76.0 | 96.1 | 78.7 | 75.7 |
SPEEK Flow Battery Membrane
Graphelt® graphite felt electrodes for flow batteries are produced from PAN-based pre-oxidized fiber mats. By loading catalysts onto the surface of the graphite fibers, the electrodes deliver enhanced battery performance. They are widely used across various types of flow batteries, and customized catalyst-loaded electrode products can be provided to meet specific customer requirements.
• High catalytic activity for improved energy efficiency;
• Excellent stability with no significant performance degradation after thousands of cycles;
• Customized development with multiple catalyst options to suit different flow battery chemistries.
TEST PERFORMANCE
Performance comparison between the Porimion® flow battery membrane and PFSA membranes in a 1 kW vanadium flow battery stack.
| Power Density (mW/cm²) | PBI Membrane | PFSA Membrane 1 | PFSA Membrane 2 | ||||||
|---|---|---|---|---|---|---|---|---|---|
| CE(%) | VE(%) | EE(%) | CE(%) | VE(%) | EE(%) | CE(%) | VE(%) | EE(%) | |
| 120 | 99.6 | 88.9 | 88.5 | 96.2 | 87.8 | 84.4 | 95.6 | 88.4 | 84.6 |
| 150 | 99.7 | 86.6 | 86.1 | 96.0 | 85.1 | 81.7 | 95.8 | 85.6 | 82.0 |
| 180 | 99.6 | 83.9 | 83.5 | 96.2 | 82.4 | 79.2 | 96.0 | 82.8 | 79.5 |
| 210 | 99.6 | 82.3 | 82.0 | 96.2 | 80.7 | 77.6 | 96.0 | 82.7 | 77.5 |
| 240 | 99.6 | 81.3 | 81.0 | 96.2 | 79.0 | 76.0 | 96.1 | 78.7 | 75.7 |