Non-fluorine ion-exchange membranes are membrane materials that do not contain fluorine and conduct ions through functional groups such as sulfonic acid or physical pores. Their core value lies in low cost, high ion selectivity, and environmental friendliness. They are mainly used to replace expensive perfluorosulfonic acid membranes (such as Nafion membranes) that produce fluorine-containing pollutants (PFAS).
We developed and produce polybenzimidazole (PBI) resin, we use PBI resin to produce the non-fluorinated ion-exchange membrane, it can be used in flow battery systems, it has good ion selectivity, high ionic conductivity, and superior vanadium resistance
advantages:
1. Our PBI membranes has better ion selectivity, high ionic conductivity, and superior vanadium resistance
2. Our PBI membranes high-temperature resistance, oxidation resistance, and chemical stability
Technical Specifications(Reference Standard):
| Specification | 技术指标Value |
| 厚度 Thickness(μm) | 20±1 |
| 拉伸强度 Tensile strength(MPa) | ≥70 |
| 断裂伸长率Elongation at break(%) | ≥100 |
| 全钒液流电池用非氟离子交换膜参数 Application parameters of VRFB | |
| 溶胀率Swelling ratio(%) | ≤3 |
| 质子电导率Proton conductivity(mS/cm) | ≥40 |
| 库伦效率Coulombic efficiency (%) | ≥99 |
| 能量效率Energy efficiency(160mA/cm2) (%) | ≥86 |
Applications:
Our non-fluorinated ion-exchange membrane is widely uses in vanadium liquid flow battery
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