Perfluorinated sulfonic acid ion selective membranes,Thickness:254𝜇m,MC:4%

Catalog Number	ACMA00033603
Density	1.98g/cm3
Application	Vanadium flow battery
Electrical Conductivity	0.1 S/cm
Elongation At Break	183%
Feature	Graphene
Ionic Form	Na+
Linear Expansion Rate	10% ( 23℃, from 50% RH to water soakage )/15% ( 100℃, from 50% RH to water soaked )
Moisture Content	4% ( 23℃,relative humidity is 50% )
Notice For Use	·Soak in 5% NaCl solution for 24 hours for pretreatment ·Use under humid conditions to avoid dryness ·Avoid excessive bending, folding and close to sharp objects ·Store in 1-118% sodium chloride solution and avoid light ·Avoid use in solutions containing oils, oxidizing substances (concentrated nitric acid, perchloric acid, etc.) and ionic high molecular weight organic compounds (surfactants, etc.)
pH Range	1.0-14
Product Type	Cation
Selectivity	90%
Size	We can provide special customized size according to your requirement
Specification	Single Sheet
Tensile Strength	38 MPa ( 23℃, 50% RH, Isotropy)
Thermal Stability	5°C-120°C
Thickness	254𝜇m
Total Exchange Capacity	0.1 meq/g
Weight	500g/m2

Q&A

What are the different classifications of membrane materials used in fuel cells?

Perfluorinated ionomers, partially fluorinated polymers, non-fluorinated membranes with aromatic backbone, non-fluorinated hydrocarbons and acid-base blends.

What is the most commonly used material for membranes in fuel cells?

Perfluorosulfonic acid (PFSA) polymers.

What are the three regions of PFSA?

A polytetrafluoroethylene (PTFE) backbone, side chains of vinyl ethers that terminate in sulfonic acid groups in a cluster region.

Why do ionomer membranes function well as ion conducting materials?

The sulfonate group clusters are hydrophilic and attract water, allowing for the mobility of ions, such as protons, in the hydrophilic regions formed by the sulfonic acid clustering.

What is the dependency of membrane performance on?

Water content and transport of water through the clusters.

What are the main characteristics of PFSA membranes relevant to fuel cell operation?

Good chemical stability, mechanical strength, high conductivity when wet, and stability in operation.

What is the standard thickness for fuel cell membranes?

50 μm.

What is the effect of thinner membranes on fuel utilization and electrode polarization?

Thinner membranes have less mechanical strength and higher reactant crossover, leading to decreased fuel utilization and electrode polarization.

What is the advantage of thicker membranes in reducing reactant crossover?

Thicker membranes can reduce reactant crossover but at the expense of higher resistance, resulting in lower power density and efficiency.

What are the potential problems associated with thicker membranes?

Thicker membranes can potentially cause electrode and material corrosion through the formation of peroxy species.