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Enhancing surface activity and durability in triple conducting electrode for protonic ceramic electrochemical cells
Shuanglin Zheng1, Wei Wu2, Yuchen Zhang2
1School of Aerospace and Mechanical Engineering, University of Oklahoma, Norman, OK, 73019, USA.
Nature Communications
|May 3, 2025
Summary
Protonic ceramic electrochemical cells (PCECs) show promise for energy applications. A novel nano-architectured oxygen electrode enhances performance and durability, overcoming key technical challenges for efficient power generation and hydrogen production.
Area of Science:
- Materials Science
- Electrochemistry
- Chemical Engineering
Background:
- Protonic ceramic electrochemical cells (PCECs) offer high efficiency for reversible energy cycling.
- PCECs face challenges in electrode activity and durability at high current densities.
Purpose of the Study:
- To develop a scalable, nano-architectured oxygen electrode for PCECs.
- To enhance catalytic activity, interfacial stability, and overall performance of PCECs.
Main Methods:
- Fabrication of a highly porous, triple-conductive oxygen electrode using a self-assembly approach.
- Electrochemical characterization of PCECs with the novel electrode in fuel cell and electrolysis modes.
Main Results:
- Achieved peak power density of 1.50 W cm⁻² at 600 °C (fuel cell mode).
- Reached current density of 5.04 A cm⁻² at 1.60 V (electrolysis mode).
- Demonstrated enhanced stability during transient operations and thermal cycling.
Conclusions:
- The nano-architectured oxygen electrode significantly improves PCEC performance and durability.
- Optimized electrode microstructure is crucial for balancing surface activity and long-term stability.
- This advancement supports the viability of PCECs for efficient energy conversion and storage.
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