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Porous Organic Polymers as Ionomers for High-Performance Alkaline Membrane Water Electrolysis
Sandra Rico-Martínez1,2, Hyeon Keun Cho2, Chuan Hu2,3
1IU CINQUIMA, Department of Inorganic Chemistry, Faculty of Science, University of Valladolid, 47011, Valladolid, Spain.
Chemsuschem
|September 5, 2024
Summary
Researchers developed new porous organic polymers (POPs) for anion exchange membrane water electrolyzers (AEMWEs). These POPs offer high performance and durability for sustainable hydrogen production.
Area of Science:
- Materials Science
- Electrochemistry
- Sustainable Energy
Background:
- Anion exchange membrane water electrolyzers (AEMWEs) are crucial for sustainable hydrogen production.
- Current AEMWEs require enhanced performance and durability for widespread adoption.
Purpose of the Study:
- To develop novel porous organic polymers (POPs) as solid-ionomers for AEMWEs.
- To evaluate the electrochemical properties and alkaline stability of these new POPs.
Main Methods:
- Synthesized POPs by reacting 4-methylpiperidone with aromatic monomers via electrophilic aromatic substitution.
- Fabricated and tested AEMWEs utilizing the synthesized POP ionomers.
- Characterized electrochemical performance and durability under alkaline conditions.
Main Results:
- Achieved a record current density of 13.4 A/cm² at 2.0 V and 80°C in 1M KOH.
- Demonstrated long-term durability with a voltage decay rate of 120 μV/h at 0.5 A/cm² for over 500 hours.
- Exhibited exceptional electrochemical properties and remarkable alkaline stability.
Conclusions:
- The novel POPs represent a significant advancement in solid-state ionomers for AEMWEs.
- This research provides a pathway for designing robust, high-performance ionomers for energy conversion devices.
- The low-cost synthesis method offers potential for scalable and economical hydrogen production.
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