Crack formation at the interface between sealing glass and other cell components is one of the key issues in constraining the development of solid oxide fuel cells (SOFCs). Herein, we report our finding on tuning the mechanical and thermal properties of borosilicate glass by doping Nb₂O₅. We observe the formation of Ba₃Nb₁₀O₂₈ crystalline phase in the Nb₂O₅-doped glass, leading to significantly enhanced crack-resistant and self-healing abilities of the glass. In addition, we demonstrate long-term thermal and chemical stability at the sealing interface between the Nb₂O₅-doped glass-ceramics and Y₂O₃-ZrO₂ electrolyte after heat-treatment at 700 °C for 1000 h. The possible mechanism for the improved crack-resistant and self-healing properties is discussed.

密封玻璃与其他电池组件之间的界面处的裂纹形成是限制固体氧化物燃料电池（SOFC）发展的关键问题之一。在此，我们报告了通过掺杂Nb ₂ O ₅来调整硼硅玻璃的机械和热性能的发现。我们观察到在掺Nb ₂ O _5的玻璃中形成了Ba ₃ Nb ₁₀ O ₂₈晶相，从而显着增强了玻璃的抗裂性和自愈能力。此外，我们证明了掺Nb ₂ O _5的玻璃陶瓷与Y之间的密封界面具有长期的热稳定性和化学稳定性。在700°C下热处理1000 h后的₂ O ₃ -ZrO ₂电解质。讨论了提高抗裂性和自愈性能的可能机理。