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Micro‐/Nanohoneycomb Solid Oxide Electrolysis Cell Anodes with Ultralarge Current Tolerance
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2018-10-14 , DOI: 10.1002/aenm.201802203 Tong Wu 1 , Wenqiang Zhang 1 , Yifeng Li 1 , Yun Zheng 1 , Bo Yu 1 , Jing Chen 1 , Xiaoming Sun 2
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2018-10-14 , DOI: 10.1002/aenm.201802203 Tong Wu 1 , Wenqiang Zhang 1 , Yifeng Li 1 , Yun Zheng 1 , Bo Yu 1 , Jing Chen 1 , Xiaoming Sun 2
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As a clean, efficient, and promising energy conversion device, solid oxide electrolysis cell (SOEC), which can achieve transformation from electricity to chemical fuels, has captured worldwide attention. A novel biomimetic honeycomb SOEC anode with super low tortuosity factor (≈1), ground‐breaking porosity (≈75%), and high structural strength, has been successfully fabricated by freeze casting and infiltrating. This honeycomb anode demonstrates ultralow polarization resistance (0.0094 Ω cm2, lower than any existing anodes reported so far) and high durability for hours at a large current density of 2.0 A cm−2 at 800 °C. These unique advantages are derived from the effective release of oxygen through the yttria‐stabilized zirconia honeycomb skeletons, and the exposure of active areas along the inner pore of the honeycomb structure after infiltrating La0.6Sr0.4CoO3±δ. Such a honeycomb electrode combines high electrical, chemical, and thermal stability under high temperatures and large current densities, demonstrating the feasibility of biomimetic structures for use in large‐scale and highly efficient energy conversion systems.
中文翻译：
具有超大电流耐受性的微/纳米蜂窝固体氧化物电解槽阳极
作为一种清洁，高效和有前途的能源转换设备，可以实现从电到化学燃料的转化的固体氧化物电解槽（SOEC）引起了全世界的关注。一种新型的仿生蜂窝状SOEC阳极，具有极低的曲折因子（≈1），突破性的孔隙率（≈75％）和高结构强度，已经通过冷冻铸造和渗透成功制备。这种蜂窝状阳极在2.0 A cm -2的大电流密度下表现出超低的极化电阻（0.0094Ωcm 2，比迄今为止报道的任何现有阳极都要低）和数小时的高耐久性在800°C下。这些独特的优势来自于通过氧化钇稳定的氧化锆蜂窝状骨架有效释放氧气，以及渗透La 0.6 Sr 0.4 CoO 3± δ后沿蜂窝状结构内孔暴露的活性区域。这种蜂窝状电极在高温和大电流密度下具有很高的电，化学和热稳定性，证明了仿生结构用于大规模和高效能量转换系统的可行性。
更新日期：2018-10-14
中文翻译：
具有超大电流耐受性的微/纳米蜂窝固体氧化物电解槽阳极
作为一种清洁，高效和有前途的能源转换设备，可以实现从电到化学燃料的转化的固体氧化物电解槽（SOEC）引起了全世界的关注。一种新型的仿生蜂窝状SOEC阳极，具有极低的曲折因子（≈1），突破性的孔隙率（≈75％）和高结构强度，已经通过冷冻铸造和渗透成功制备。这种蜂窝状阳极在2.0 A cm -2的大电流密度下表现出超低的极化电阻（0.0094Ωcm 2，比迄今为止报道的任何现有阳极都要低）和数小时的高耐久性在800°C下。这些独特的优势来自于通过氧化钇稳定的氧化锆蜂窝状骨架有效释放氧气，以及渗透La 0.6 Sr 0.4 CoO 3± δ后沿蜂窝状结构内孔暴露的活性区域。这种蜂窝状电极在高温和大电流密度下具有很高的电，化学和热稳定性，证明了仿生结构用于大规模和高效能量转换系统的可行性。
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