Electrochemical cell, electrochemical cell device, module, and module accommodation device

WO2025070717A1 Publication Date: 2025-04-03KYOCERA CORP
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Patent Information

Application Number
PCT/JP2024/034633
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2023-09-27
Filing Date
2024-09-27
Publication Date
2025-04-03

AI Technical Summary

Technical Problem

There is room for improvement in the durability of the existing fuel cell stack equipment, which leads to prone to cracks, peeling between electrodes and electrolyte layers during long-term use, affecting the reliability and life of the equipment.

Method used

ZrO2 is used as the material of the electrolyte layer, and a solid solution region rich in a first dopant (such as Gd) is formed at the portion where the electrolyte layer is in contact with the fuel electrode, ensuring that the concentration of the first dopant is higher than the average concentration in the electrode. This design reduces the risk of cracks due to volume changes in Ce oxides and increases the bonding force between the electrode and the electrolyte layer.

Benefits of technology

By increasing the solid solution zone in the electrolyte layer, the durability of the fuel cell is significantly improved, and the possibility of cracks and peeling is reduced, thereby extending the service life of the equipment and improving its overall performance.

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Abstract

This electrochemical cell comprises a solid electrolyte layer and a first electrode. The solid electrolyte layer contains ZrO2. The first electrode contains CeO2 and a first dopant. The solid electrolyte layer has a solid solution part which contacts the first electrode. The solid solution part contains Ce and the first dopant. In the solid solution part, the ratio of the concentration of the first dopant to the total concentration of Ce and the first dopant is greater than the average ratio of the concentration of the first dopant to the total concentration of Ce and the first dopant in the first electrode.
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