Non-Fluorinated Polymer Composite Proton Exchange Membranes for Fuel Cell Applications - A Review

Area of Science:

• Materials Science
• Electrochemistry
• Chemical Engineering

Background:

• Proton exchange membrane fuel cells (PEMFCs) critically rely on proton exchange membranes (PEMs).
• Current industry-standard perfluorosulfonic acid membranes (e.g., Nafion) exhibit reduced performance at higher temperatures due to dehydration.
• Operating below 100°C in PEMFCs leads to issues like cathode flooding, catalyst poisoning, and increased system complexity and cost.

Purpose of the Study:

• To review recent advancements in composite PEMs utilizing non-fluorinated polymers for high-temperature applications.
• To evaluate the properties and impact of various inorganic fillers on PEM fuel cell performance.
• To identify promising polymer and filler combinations for high-temperature proton exchange membranes (HTPEMs).

Main Methods:

• Literature review focusing on composite PEMs based on non-fluorinated polymers.
• Analysis of inorganic filler properties and their influence on membrane characteristics.
• Assessment of the effect of composite membranes on overall PEMFC performance.

Main Results:

• Non-fluorinated polymers present a viable alternative to traditional membranes.
• Incorporating inorganic materials into a polymer matrix enhances membrane efficiency at higher temperatures.
• Composite membranes show potential for achieving target performance while reducing costs.

Conclusions:

• Composite membranes based on non-fluorinated polymers are a key area for developing effective HTPEMs.
• Strategic selection of inorganic fillers is crucial for optimizing proton conductivity and stability.
• These advanced composite membranes offer a pathway to overcome limitations of current PEMFC technology.