Composite Proton Exchange Membrane Based on Poly-1-Vinyl-1,2,4-Triazole with Sulfofullerene

Area of Science:

• Materials Science
• Electrochemistry
• Nanotechnology

Background:

• Proton exchange membrane fuel cells (PEMFCs) offer a clean energy alternative to traditional power sources.
• Developing efficient and stable proton exchange membranes (PEMs) is crucial for advancing PEMFC technology.

Purpose of the Study:

• To synthesize and characterize novel nanocomposite PEMs based on poly-1-vinyl-1,2,4-triazole modified with polyhydroxysulfonated fullerene.
• To investigate the impact of sulfofullerene incorporation on membrane properties, including proton conductivity and nanoparticle dispersion.

Main Methods:

• Synthesis of poly-1-vinyl-1,2,4-triazole polymer matrix.
• Modification of the polymer matrix with polyhydroxysulfonated fullerene to create nanocomposites.
• Characterization of membrane properties, including proton conductivity and nanoparticle distribution using techniques like microscopy and electrochemical measurements.

Main Results:

• The nanocomposite PEMs achieved a proton conductivity of up to 1.67 mS/cm.
• Uniform distribution of carbon nanoparticles (up to 10 nm) within the polymer matrix was observed.
• Acid-base interactions between sulfofullerene and the polymer matrix ensured high dispersion and stabilization of nanoparticles.

Conclusions:

• The incorporation of sulfofullerene significantly enhances the key properties of proton exchange membranes.
• The developed fullerene-containing PEMs exhibit high potential for practical applications in various fuel cells.
• Stabilization of functionalized fullerenes within a semi-interpenetrating polymer network matrix represents an innovative approach for proton-conducting systems.