Achieving 360 NL h−1 Hydrogen Production Rate Through 30‐Cell Solid Oxide Electrolysis Stack with LSCF–GDC Composite Oxygen Electrode
Achieving 360 NL h−1 Hydrogen Production Rate Through 30‐Cell Solid Oxide Electrolysis Stack with LSCF–GDC Composite Oxygen Electrode
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DOI：
10.1002/fuce.201400051
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发表时间：
2014-12
期刊：
影响因子：
2.8
通讯作者：
Y. Zheng;T. Chen;Q. Li;W. Wu;H. Miao;C. Xu;W. Wang
中科院分区：
文献类型：
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作者：
Y. Zheng;T. Chen;Q. Li;W. Wu;H. Miao;C. Xu;W. Wang
在750 °C下，在蒸汽电解模式下测试了由30个电池的平面Ni-YSZ氢电极支撑的单电池与La0.6Sr0.4Co0.2Fe0.8O3-δ-Ce0.9Gd0.1O1.95（LSCF-GDC）复合氧电极、互连件和密封材料组成的30个电池的固体氧化物电解（SOE）堆用于制氢。气体在电池堆中的流动方向是交叉流动配置，并且电池堆配置被设计为在空气出口处打开气体流动通道。在小于0.5A cm-2的电流密度下，在90/10 H2O/H2比下，电池堆的电解效率高于100%。在制氢过程中，电池堆在750 °C、0.5 A cm−2恒定电流密度下运行超过500 h，降解率为4.06% k h−1。蒸汽转化率高达73%，电流效率高达91.6%，净产氢率高达361.4 NL h−1。我们的研究结果表明，采用LSCF-GDC复合氧电极设计的SOE电堆可用于进行大规模制氢。
A 30‐cell solid oxide electrolysis (SOE) stack consisting of 30‐cell planar Ni–YSZ hydrogen electrode‐supported single cell with La0.6Sr0.4Co0.2Fe0.8O3–δ–Ce0.9Gd0.1O1.95 (LSCF–GDC) composite oxygen electrodes, interconnects, and sealing materials was tested at 750 °C in steam electrolysis mode for hydrogen production. The direction of gas flow in the stack was a cross‐flow configuration, and the stack configuration was designed to open gas flow channels at the air outlet. The electrolysis efficiency of the stack was higher than 100% at 90/10H2O/H2 ratio under <0.5 A cm−2 current density. During hydrogen production, the stack was operated at 750 °C under 0.5 A cm−2 constant current density for more than 500 h with 4.06% k h−1 degradation rate. Up to 73% steam conversion rate and 91.6% current efficiency were obtained; the net hydrogen production rate reached as high as 361.4 NL h−1. Our results suggested that the SOE stack that was designed with LSCF–GDC composite oxygen electrode could be used to conduct large‐scale hydrogen production.