Characteristics of Oxygen Electrode Supported Reversible Solid Oxide Cells
Characteristics of Oxygen Electrode Supported Reversible Solid Oxide Cells
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DOI：
10.1149/1945-7111/abfa58
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发表时间：
2021-04
影响因子：
3.9
通讯作者：
Shan-Lin Zhang;Hongqian Wang;Tianrang Yang;Matthew Y. Lu;S. Barnett
中科院分区：
文献类型：
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作者：
Shan-Lin Zhang;Hongqian Wang;Tianrang Yang;Matthew Y. Lu;S. Barnett
氧电极支撑的固体氧化物电池（OESC）具有优于燃料电极支撑的电池的潜在优势，包括减少的燃料电极浓差极化、更好的氧电极电流收集以及燃料电极选择的灵活性。然而，存在严重的缺点，包括难以共烧氧电极和电解质，以及氧电极浓差极化。本文探讨了具有SrTi 0.3 Fe 0.6 Co 0.1 O 3 − δ（STFC）渗透增强的La 0.8 Sr 0.2 MnO 3− δ-Zr 0.92 Y 0.16 O 2− δ（LSM-YSZ）电极载体、薄YSZ电解质和SrTi 0.3 Fe 0.7 O 3− δ（STF）燃料电极的OESC的特性。STFC渗透使燃料电池最大功率密度增加> 1.5倍，电解电流密度（在1.3V下）增加> 2倍。电池在纯氧中的性能相比，在空气中，探索一种可能的可逆固体氧化物电池系统的配置，电解过程中产生的氧气被存储，并随后在燃料电池操作过程中使用。燃料电池的最大功率密度从空气中的0.88 W cm-2增加到氧气中的1.37 W cm-2，极限电流从1.7 A cm-2增加到> 5.6 A cm-2;电解性能基本上没有变化，可能是因为电极空气在电解期间变得富含氧气。
Oxygen-electrode-supported solid oxide cells (OESCs) have potential advantages over fuel-electrode-supported cells, including reduced fuel-electrode concentration polarization, better oxygen electrode current collection, and flexibility in the fuel electrode choice. However, there are serious drawbacks including the difficulty of co-firing the oxygen electrode and electrolyte, and oxygen electrode concentration polarization. This paper explores the characteristics of OESCs with La 0.8 Sr 0.2 MnO 3− δ-Zr 0.92 Y 0.16 O 2− δ (LSM-YSZ) electrode-support enhanced by SrTi 0.3 Fe 0.6 Co 0.1 O 3− δ (STFC) infiltration, thin YSZ electrolyte, and SrTi 0.3 Fe 0.7 O 3− δ (STF) fuel electrodes. The STFC infiltration increases fuel cell maximum power density by> 1.5 times and electrolysis current density (at 1.3 V) by> 2 times. Cell performance in pure oxygen is compared to that in air, exploring a possible reversible solid oxide cell system configuration where oxygen produced during electrolysis is stored and subsequently used during fuel cell operation. The fuel cell maximum power density is increased from 0.88 W cm− 2 in air to 1.37 W cm− 2 in oxygen, with limiting current increased from 1.7 to> 5.6 A cm− 2; the electrolysis performance is essentially unchanged, probably because the electrode air becomes enriched with oxygen during electrolysis.