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Ion-Exchange Membranes for the Fabrication of Reverse Electrodialysis Device
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Microporous Electrode Binders for Anion Exchange Membrane Water Electrolyzers
Hamza Khalid1,2, Michaela Plevová3, Trung Tuyen Bui1
1Hydrogen·Fuel Cell Research Center, Korea Institute of Science and Technology, Seoul, 02792, Republic of Korea.
Small (Weinheim an Der Bergstrasse, Germany)
|May 28, 2024
Summary
Researchers improved anion exchange membrane (AEM) water electrolyzers by blending SEBS-DABCO binder with PIM-1. A 50% PIM-1 blend enhanced gas and water transport, boosting electrolyzer performance.
Area of Science:
- Materials Science
- Electrochemistry
- Chemical Engineering
Background:
- Anion exchange membrane (AEM) water electrolyzers require efficient hydroxide ion transport.
- Polymeric binders in electrodes must facilitate reactant transport and gas removal.
- Gas pocket formation can impede reactant access to catalysts, reducing efficiency.
Purpose of the Study:
- To enhance the performance of AEM water electrolyzers.
- To investigate the effect of blending PIM-1 with SEBS-DABCO binder.
- To optimize binder properties for improved ion and gas transport.
Main Methods:
- Blending SEBS-DABCO with varying amounts of PIM-1 (a polymer of intrinsic microporosity).
- Evaluating water permeability, swelling, and conductivity of the polymer blends.
- Conducting ex situ and in situ electrochemical tests in an AEM water electrolyzer.
Main Results:
- Increasing PIM-1 content enhanced water permeability but decreased swelling and conductivity.
- Blends with 50% PIM-1 exhibited superior properties compared to 25% and 75% blends.
- Electrolyzer tests confirmed improved performance with the 50% PIM-1 blend.
Conclusions:
- The 50% PIM-1 blend offers an optimal balance of properties for AEM water electrolyzer binders.
- PIM-1 incorporation can mitigate gas pocket formation and improve overall electrolyzer efficiency.
- This strategy presents a promising approach for advancing AEM water electrolysis technology.
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