Efficiency Analysis of Fuel Cell Components with Ionic Poly-Arylether Composite Membrane

Area of Science:

• Polymer Science
• Materials Science
• Electrochemistry

Background:

• Sulfonated polyetheretherketone (SPEEK) is a promising material for membranes but suffers from swelling.
• Polyethylene glycol (PEG) is explored as an additive to modify polymer properties.

Purpose of the Study:

• To investigate the effect of polyethylene glycol (PEG) on the properties of SA8 blended sulfonated polyetheretherketone (SPEEK) composite films.
• To understand how PEG's hydrogen bonding influences film characteristics and proton conductivity.
• To address swelling issues in high-sulfonation SPEEK films.

Main Methods:

• Preparation of composite films by blending SA8 and SPEEK solutions with PEG.
• Varying the mixing ratios of SA8, SPEEK, and PEG to create different film formulations.
• Characterization of the resulting composite films for thermal stability, dimensional stability, and proton conductivity.

Main Results:

• The addition of PEG to SA8/SPEEK composite films resulted in physical cross-linking.
• Increased SPEEK content led to a decrease in proton conductivity.
• PEG's hydrogen bonding improved the dimensional stability of the composite films.
• The composite membranes exhibited good thermal stability.

Conclusions:

• Polyethylene glycol (PEG) addition effectively improves the dimensional stability of SPEEK composite films and mitigates swelling.
• While SPEEK can decrease proton conductivity, PEG's physical cross-linking enhances it.
• The developed composite films offer a balance of properties, including excellent dimensional stability and thermal resistance, making them suitable for various applications.