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Ion-Exchange Membranes for the Fabrication of Reverse Electrodialysis Device
Published on: July 20, 2021
Solid-state water electrolysis with an alkaline membrane.
Yongjun Leng1, Guang Chen, Alfonso J Mendoza
1Electrochemical Engine Center, The Pennsylvania State University, University Park, Pennsylvania 16802, United States.
Journal of the American Chemical Society
|May 17, 2012
Summary
This study demonstrates durable, solid-state alkaline membrane water electrolysis using an anion exchange membrane (AEM) and ionomer. This advancement offers a promising pathway for low-cost, scalable hydrogen production.
Area of Science:
- Electrochemistry
- Materials Science
- Sustainable Energy
Background:
- Alkaline membrane water electrolysis (AEMWE) is a promising technology for hydrogen production.
- Traditional AEMWE often relies on liquid electrolytes, posing challenges for system design and scalability.
- Developing solid-state AEMWE systems is crucial for simplified and robust hydrogen generation.
Purpose of the Study:
- To report high-performance and durable alkaline membrane water electrolysis in a solid-state cell.
- To investigate the use of anion exchange membranes (AEMs) and catalyst layer ionomers without liquid electrolyte.
- To optimize AEM-based electrolysis for enhanced longevity and efficiency.
Main Methods:
- Fabrication of a solid-state electrolysis cell utilizing an anion exchange membrane (AEM).
- Incorporation of a catalyst layer ionomer facilitating hydroxide ion conduction.
- Testing the cell performance at 50 °C with iridium oxide anode and Pt black cathode catalysts.
- Evaluating cell durability through optimized ionomer composition and water feed configuration.
Main Results:
- Achieved a current density of 399 mA/cm² at 1.80 V at 50 °C.
- Demonstrated improved durability by incorporating a robust ionomer and optimizing water delivery.
- Successfully operated the AEM-based electrolysis cell for over 535 hours.
- Confirmed the viability of solid-state operation without external liquid electrolyte addition.
Conclusions:
- Solid-state alkaline membrane water electrolysis is feasible and offers high performance.
- Durable ionomers and optimized configurations are key to long-lasting AEM electrolysis.
- This technology presents a significant step towards cost-effective and scalable hydrogen production.
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