The development of high-performance electrolyte-supported reversible solid oxide cells(RSOCs)is significantly hindered by the limitations of existing electrolyte materials,particularly in achieving high ionic conducti...The development of high-performance electrolyte-supported reversible solid oxide cells(RSOCs)is significantly hindered by the limitations of existing electrolyte materials,particularly in achieving high ionic conductivity and long-term stability under targeted operating conditions.While scandia stabilized zirconia(ScSZ)exhibits the highest ionic conductivity among zirconia-based electrolytes,ScSZ rapid conductivity degradation during prolonged operation remains a significant obstacle to commercialization.To address this pressing challenge,both binary and ternary co-doping were explored,incorporating Mg^(2+),In^(3+),Yb^(3+),and Sm^(3+)into the base composition of(Sc_(2)O_(3))_(0.11)(ZrO_(2))_(0.89)(11ScSZ).Among these,the optimized ternary co-doped composition,(In_(2)O_(3))_(0.0025)(Yb_(2)O_(3))_(0.0025)(Sc_(2)O_(3))_(0.11)(ZrO_(2))_(0.885)(0.25In0.25Yb11ScSZ),demonstrates significant enhancements in both ionic conductivity and stability.This ternary co-doped electrolyte exhibits superior conductivity and nearly double the stability of undoped 11ScSZ.In addition,it exhibits an enhanced flexural strength even higher than state-of-the-art electrolytes(161 MPa)and respectably wide electrolytic domain(10^(-16)-10^(-27)atm at 800℃).When implemented in 200μm-thick electrolyte-supported RSOC devices,the 0.25In0.25Yb11ScSZ electrolyte enables record-breaking performance,achieving a peak power density(PPD)of 1.02 W cm^(-2)in fuel cell(FC)mode and a current density of 1.05 A cm^(-2)at 1.3 V in electrolysis cell(EC)mode at 800℃both representing two-to three-fold improvement over state-of-the-art systems.These exceptional performance metrics,combined with excellent long-term durability,rank among the highest reported for electrolyte-supported cells,highlighting the potential of this novel ternary co-doped electrolyte for high-performance RSOC technologies capable of meeting the demanding requirements of next-generation energy systems.展开更多
基金Korea Evaluation Institute of Industrial Technology(KEIT)and the Ministry of Trade,Industry&Energy(MOTIE)of the Republic of Korea(No.20020284)Materials&Components Technology Development(R&D)Program(No.00432124)funded by the Ministry of Trade,Industry&Energy(MOTIE,Korea)。
文摘The development of high-performance electrolyte-supported reversible solid oxide cells(RSOCs)is significantly hindered by the limitations of existing electrolyte materials,particularly in achieving high ionic conductivity and long-term stability under targeted operating conditions.While scandia stabilized zirconia(ScSZ)exhibits the highest ionic conductivity among zirconia-based electrolytes,ScSZ rapid conductivity degradation during prolonged operation remains a significant obstacle to commercialization.To address this pressing challenge,both binary and ternary co-doping were explored,incorporating Mg^(2+),In^(3+),Yb^(3+),and Sm^(3+)into the base composition of(Sc_(2)O_(3))_(0.11)(ZrO_(2))_(0.89)(11ScSZ).Among these,the optimized ternary co-doped composition,(In_(2)O_(3))_(0.0025)(Yb_(2)O_(3))_(0.0025)(Sc_(2)O_(3))_(0.11)(ZrO_(2))_(0.885)(0.25In0.25Yb11ScSZ),demonstrates significant enhancements in both ionic conductivity and stability.This ternary co-doped electrolyte exhibits superior conductivity and nearly double the stability of undoped 11ScSZ.In addition,it exhibits an enhanced flexural strength even higher than state-of-the-art electrolytes(161 MPa)and respectably wide electrolytic domain(10^(-16)-10^(-27)atm at 800℃).When implemented in 200μm-thick electrolyte-supported RSOC devices,the 0.25In0.25Yb11ScSZ electrolyte enables record-breaking performance,achieving a peak power density(PPD)of 1.02 W cm^(-2)in fuel cell(FC)mode and a current density of 1.05 A cm^(-2)at 1.3 V in electrolysis cell(EC)mode at 800℃both representing two-to three-fold improvement over state-of-the-art systems.These exceptional performance metrics,combined with excellent long-term durability,rank among the highest reported for electrolyte-supported cells,highlighting the potential of this novel ternary co-doped electrolyte for high-performance RSOC technologies capable of meeting the demanding requirements of next-generation energy systems.
