A Highly-Performed, Dual-Layered Cathode Supported Solid Oxide Electrolysis Cell for Efficient CO2 Electrolysis Fabricated by Phase Inversion Co-Tape Casting Method
A Highly-Performed, Dual-Layered Cathode Supported Solid Oxide Electrolysis Cell for Efficient CO2 Electrolysis Fabricated by Phase Inversion Co-Tape Casting Method
复制标题
采用相转化共流延铸造法制造的高性能双层阴极支持固体氧化物电解槽，用于高效 CO2 电解
DOI：
10.1149/2.0841712jes
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发表时间：
2017
影响因子：
3.9
通讯作者：
Wang Yao
中科院分区：
文献类型：
--
作者：
Liu Tong;Chen Xi;Wu Jiajia;Sheng Zhongyi;Liu Guangrong;Wang Yao
电解法将CO2高效转化为燃料是一种很有前途的能源储存和CO2利用方法。在这项研究中，Ni-YSZ阴极支撑与分层定向指状大孔制备相转化共流延法，以尽量减少浓差极化，提高电池性能。更重要的是，在支撑体和电解质之间引入活性阴极功能层，以降低活化极化，进一步提高电池性能。还采用双层YSZ/GDC电解质来实现高离子电导率和低电子电导率，从而提高电池效率并降低操作温度。因此，电解槽显示出一个相对较高的电解电流密度为− 1.107 A cm − 2和一个显着较低的电极极化电阻为0.32 Ω cm 2，在700 C和1.3 V时，阴极和阳极分别暴露于67%的CO2 - 33%的CO和环境空气中，由于显着降低浓度和活化极化。热力学计算表明，在富CO气氛下，电解槽可能会发生积炭，但SEM和拉曼光谱分析均未发现积炭现象，这表明对CO2电解过程中的积炭问题还需进一步研究。
Efficient conversion of CO 2 to fuels through electrolysis is a promising approach for energy storage and CO 2 utilization. In this study, Ni-YSZ cathode support with hierarchically oriented finger-like macro-pores is fabricated by phase inversion co-tape casting method to minimize the concentration polarization and enhance the cell performance. More important, an active cathode functional layer is introduced between support and electrolyte in order to decrease the activation polarization and further improve the cell performance. A bilayered YSZ/GDC electrolyte is also employed to achieve high ionic conductivity and low electronic conductivity, and thereby to improve the cell efficiency and lower the operation temperature. Consequently, the electrolyzer exhibits a relatively high electrolysis current density of− 1.107 A cm− 2 and a significantly low electrode polarization resistance of 0.32 Ωcm 2 at 700 C and 1.3 V when the cathode and anode are exposed to 67% CO 2-33% CO and ambient air, respectively, resulting from remarkably decreased concentration and activation polarization. Thermodynamics calculations imply that the cells may suffer from the carbon coke issue in the CO-rich atmospheres, but no evidence of coking has been observed by SEM and Raman Spectroscopy, indicating that further work should be done to deeper understand the coking issue during the CO 2 electrolysis process.