Products Description
Two important roles of waterproof and breathable membranes
1、 Waterproof and leak-proof: prevent electrolyte from seeping out or blocking air passages.
2、 Breathable: It can smoothly allow air or oxygen to enter the catalytic layer, so as to ensure the continuous continuation of the reaction.
Technical Parameters
| Item | Specification value | unit | Remark |
| Material type | PTFE + Carbon | / | |
| Thickness | 0.3±0.05 | mm | |
| Breathability | 30~40 | ml/cm2/min | Under 7kPa conditions |
| Density | 0.75±0.05 | g/cm3 | |
| Porosity | 20~25 | % | |
| Bend radius | 1 | cm | |
| Strength | Transverse＞0.8；Longitudinal＞8 | MPa | |
| Elongation at break | Transverse＞100；Longitudinal＞20 | % |
When the waterproof and breathable membrane is pressed and adhered together with the cathode catalytic material and the current collecting layer, it can achieve better leak-proof effect.
The characteristics of a good waterproof membrane: water droplets drop on the membrane, the contact area between the bottom of the water droplet and the membrane is small, the angle is close to 90°, and the water droplets can roll freely on the membrane and are not sticky to the membrane. The membrane has relatively good toughness and air permeability.
