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Pr2BaNiMnO7−δ double-layered Ruddlesden–Popper perovskite oxides as efficient cathode electrocatalysts for low temperature proton conducting solid oxide fuel cells
Journal of Materials Chemistry A ( IF 11.9 ) Pub Date : 2019-12-25 , DOI: 10.1039/c9ta11212j Qi Wang 1, 2, 3, 4, 5 , Jie Hou 1, 2, 3, 4 , Yun Fan 1, 2, 3, 4 , Xiu-an Xi 1, 2, 3, 4 , Jun Li 1, 2, 3, 4, 5 , Ying Lu 1, 2, 3, 4, 5 , Ge Huo 1, 2, 3, 4, 5 , Lin Shao 1, 2, 3, 4, 5 , Xian-Zhu Fu 1, 2, 3, 4 , Jing-Li Luo 1, 2, 3, 4, 6
Journal of Materials Chemistry A ( IF 11.9 ) Pub Date : 2019-12-25 , DOI: 10.1039/c9ta11212j Qi Wang 1, 2, 3, 4, 5 , Jie Hou 1, 2, 3, 4 , Yun Fan 1, 2, 3, 4 , Xiu-an Xi 1, 2, 3, 4 , Jun Li 1, 2, 3, 4, 5 , Ying Lu 1, 2, 3, 4, 5 , Ge Huo 1, 2, 3, 4, 5 , Lin Shao 1, 2, 3, 4, 5 , Xian-Zhu Fu 1, 2, 3, 4 , Jing-Li Luo 1, 2, 3, 4, 6
Affiliation
The performance of low-temperature solid-oxide fuel cells (LT-SOFCs) is heavily dependent on the electrocatalytic activity of the cathode toward the oxygen reduction reaction (ORR). To overcome the obstacles of the poor activity and stability of traditional cathode materials, a Pr2BaNiMnO7−δ double-layered Ruddlesden–Popper structural oxide was developed that exhibits high ORR activity, exceptional low-temperature cell performance, long-term stability, and excellent chemical compatability with a BaZr0.1Ce0.7Y0.1Yb0.1O3−δ (BZCYYb) proton-conducting electrolyte. When Pr2BaNiMnO7−δ is used as the cathode electrocatalyst for BZCYYb-based SOFCs, it demonstrates a peak power density of 1070 mW cm−2 at 700 °C with excellent stability under 0.7 V after 100 h of discharging. Even at 500 and 400 °C, the peak power densities still reach 259 and 135 mW cm−2, respectively. The area-specific polarization resistance of this cell is 0.084 Ω cm2 at 700 °C under open-circuit voltage (OCV) conditions. Interestingly, the activation energy (Ea) of the polarization resistance derived from the assembled single cell is lower than that in the reported literature, corresponding to a value of 0.96 eV. The excellent performance is higher than those of the state-of-the-art Ruddlesden–Popper structure materials used as cathode electrocatalysts for LT-SOFCs. Thus, these results suggest that the double-layered Ruddlesden–Popper perovskite oxide Pr2BaNiMnO7−δ is a preeminent highly active low-temperature cathode material.
中文翻译:
Pr2BaNiMnO7-δ双层Ruddlesden-Popper钙钛矿氧化物作为低温质子传导固体氧化物燃料电池的有效阴极电催化剂
低温固体氧化物燃料电池(LT-SOFC)的性能在很大程度上取决于阴极对氧还原反应(ORR)的电催化活性。为了克服传统阴极材料活性和稳定性差的障碍,开发了具有高ORR活性,优异的低温电池性能,长期稳定性的Pr 2 BaNiMnO 7 - δ双层Ruddlesden-Popper结构氧化物。并与BaZr 0.1 Ce 0.7 Y 0.1 Yb 0.1 O 3− δ(BZCYYb)质子传导电解质具有出色的化学相容性。当Pr 2 BaNiMnO 7− δ用作基于BZCYYb的SOFC的阴极电催化剂,它显示出700°C时的峰值功率密度为1070 mW cm -2,放电100 h后在0.7 V下具有出色的稳定性。即使在500和400°C,峰值功率密度仍分别达到259和135 mW cm -2。在开路电压(OCV)条件下,该电池在700°C时的比表面积极化电阻为0.084Ωcm 2。有趣的是,活化能(E a)从组装的单电池获得的极化电阻低于报道的文献中的极化电阻,对应值为0.96 eV。优异的性能高于用作LT-SOFC阴极电催化剂的最新Ruddlesden-Popper结构材料。因此,这些结果表明双层Ruddlesden-Popper钙钛矿氧化物Pr 2 BaNiMnO 7- δ是一种出色的高活性低温阴极材料。
更新日期:2019-12-25
中文翻译:
Pr2BaNiMnO7-δ双层Ruddlesden-Popper钙钛矿氧化物作为低温质子传导固体氧化物燃料电池的有效阴极电催化剂
低温固体氧化物燃料电池(LT-SOFC)的性能在很大程度上取决于阴极对氧还原反应(ORR)的电催化活性。为了克服传统阴极材料活性和稳定性差的障碍,开发了具有高ORR活性,优异的低温电池性能,长期稳定性的Pr 2 BaNiMnO 7 - δ双层Ruddlesden-Popper结构氧化物。并与BaZr 0.1 Ce 0.7 Y 0.1 Yb 0.1 O 3− δ(BZCYYb)质子传导电解质具有出色的化学相容性。当Pr 2 BaNiMnO 7− δ用作基于BZCYYb的SOFC的阴极电催化剂,它显示出700°C时的峰值功率密度为1070 mW cm -2,放电100 h后在0.7 V下具有出色的稳定性。即使在500和400°C,峰值功率密度仍分别达到259和135 mW cm -2。在开路电压(OCV)条件下,该电池在700°C时的比表面积极化电阻为0.084Ωcm 2。有趣的是,活化能(E a)从组装的单电池获得的极化电阻低于报道的文献中的极化电阻,对应值为0.96 eV。优异的性能高于用作LT-SOFC阴极电催化剂的最新Ruddlesden-Popper结构材料。因此,这些结果表明双层Ruddlesden-Popper钙钛矿氧化物Pr 2 BaNiMnO 7- δ是一种出色的高活性低温阴极材料。