A novel self-sealing structure for metal-supported solid oxide fuel cells (MS-SOFCs) is designed by applying brazing technology between the metal support and interconnector to solve the sealing problem on the anode side of planar SOFCs. A high-reliability self-sealing effect is thus realized at the anode side of the MS-SOFC. Plasma spraying technology is used to prepare cell functional layers including the anode, cathode, and electrolyte. A single cell is assembled with a 50–60-μm plasma-sprayed Sc2O3-stabilized ZrO2 (ScSZ) electrolyte layer. The gas permeability of the self-sealed MS-SOFC without a cathode layer is 0.42 × 10−17 m2. The open-circuit voltage of the cell is ~ 1.1 V in the operating temperature range from 550 to 750 °C. The power density of the cell reaches 1109 mW cm−2 at 750 °C under standard atmosphere. In addition, the use of a fuel gas pressure that is 20 kPa higher than the cathodic gas pressure results in a significant increase in the power density to 1782 mW cm−2 at 750 °C. The novel cell structure and gas tightness of the ScSZ electrolyte prepared by plasma spraying indicates that it can meet the requirements of SOFC applications.

中文翻译：

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等离子喷涂自密封金属支撑SOFC及其在不平衡气压下的性能

通过在金属支撑体和互连器之间应用钎焊技术，设计了一种新型的金属支撑固体氧化物燃料电池（MS-SOFCs）自密封结构，以解决平面SOFCs阳极侧的密封问题。因此在 MS-SOFC 的阳极侧实现了高可靠性的自密封效果。等离子喷涂技术用于制备包括阳极、阴极和电解质在内的电池功能层。单个电池由 50-60-μm 等离子喷涂 Sc2O3 稳定的 ZrO2 (ScSZ) 电解质层组装而成。没有阴极层的自密封 MS-SOFC 的气体渗透率为 0.42 × 10-17 m2。在 550 至 750 °C 的工作温度范围内，电池的开路电压为 ~ 1.1 V。电池在标准大气下 750°C 时的功率密度达到 1109 mW cm-2。此外，使用比阴极气体压力高 20 kPa 的燃料气体压力会导致功率密度在 750 °C 时显着增加至 1782 mW cm-2。等离子喷涂制备的 ScSZ 电解液的新型电池结构和气密性表明它可以满足 SOFC 应用的要求。