Studying Performance and Kinetic Differences between Various Anode Electrodes in Proton Exchange Membrane Water...

Area of Science:

• Electrochemistry
• Materials Science
• Chemical Engineering

Background:

• Proton exchange membrane water electrolysis (PEMWE) is crucial for green hydrogen production.
• The electrode is a critical component influencing PEMWE cell performance.
• Variations in electrode fabrication can affect cell kinetics and resistance.

Purpose of the Study:

• To comprehensively investigate the effects of different electrode fabrication techniques on PEMWE performance.
• To analyze the impact of coating methods, hot pressing, and decal transfer on electrode properties.
• To study the influence of catalyst ink composition on electrode performance.

Main Methods:

• Fabrication of electrodes using ultrasonic spray, blade coating, and rod coating methods.
• Optimization of hot press and decal transfer processes.
• Systematic variation of catalyst ink composition (ionomer to catalyst ratio, water to alcohol ratio, catalyst weight percentage).

Main Results:

• Electrode coating methods, hot press, and decal transfer processes showed minimal performance variations (max 26 mV at 2.0 A cm^-2).
• Catalyst ink composition adjustments resulted in even smaller performance changes (less than 10 mV at 2.0 A cm^-2).
• The fabricated PEMWE electrodes demonstrated superior compatibility and redundancy.

Conclusions:

• Electrode fabrication methods have a limited impact on PEMWE performance, indicating high flexibility.
• The findings suggest significant potential for large-scale manufacturing of PEMWE electrodes.
• The study confirms the robustness of PEMWE electrode fabrication processes.