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Three-phase interface ultra-thin lead implantation process
Microstructure of interface after implanting ultra-thin measuring lead
As environmental concerns continue to grow, solid oxide fuel cells (SOFCs) are gaining more attention for their potential in clean energy applications. The basic structure of an SOFC consists of a supporting anode, an active anode, an electrolyte, and an active cathode. Achieving stable and high-performance operation is crucial for the commercialization of this technology. However, traditional methods like electrochemical impedance spectroscopy (EIS) struggle to isolate the key factors affecting cell performance due to the layered structure of the components. This limitation makes it difficult to understand how each part contributes to the overall efficiency of the system.
Researchers at the Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, have made significant progress by developing a novel approach. They implanted ultra-thin electrodes at the three-phase interface between the two sides of the electrolyte. This breakthrough enabled the creation of a full cell with integrated measurement leads, allowing for in-situ analysis of the cell's performance. Their findings revealed that the performance of the SOFC is primarily governed by the interface between the electrode and the electrolyte (TPB). An increase in polarization resistance at the anode side was identified as a major contributor to rising internal resistance, while the output voltage showed higher sensitivity to ohmic resistance. These results were published in *Advanced Energy Materials* (Adv. Energy Mater. doi: 10.1002/aenm.201400120).
This study represents a major step forward in understanding and improving SOFC performance. By enabling real-time observation of voltage composition and quantifying the contribution of the three-phase interface, the research opens new avenues for optimizing SOFC design. It not only addresses critical challenges in interface characterization but also provides a practical foundation for enhancing the efficiency and reliability of these fuel cells in future energy systems.
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