Flow Field Design Matters for High Current Density Zero-Gap CO2 Electrolyzers

被引:6
作者
Yuan, Shu [1 ]
Wang, Rongyi [1 ]
Xue, Rui [1 ]
Wu, Lizhen [3 ]
Zhang, Guiru [1 ]
Li, Huiyuan [1 ]
Wang, Qing [3 ]
Yin, Jiewei [1 ]
Luo, Liuxuan [1 ]
Shen, Shuiyun [1 ]
An, Liang [3 ]
Yan, Xiaohui [1 ]
Zhang, Junliang [1 ,2 ]
机构
[1] Shanghai Jiao Tong Univ, Inst Fuel Cells, Sch Mech Engn, Shanghai 200240, Peoples R China
[2] Shanghai Jiao Tong Univ, Key Lab Power Machinery & Engn, MOE, Shanghai 200240, Peoples R China
[3] Hong Kong Polytech Univ, Dept Mech Engn, Kowloon, Hong Kong 999077, Peoples R China
基金
中国国家自然科学基金;
关键词
REDUCTION;
D O I
10.1021/acsenergylett.4c02534
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The commercialization of CO2 electrolyzers requires higher current densities. This work demonstrates the necessity of flow field optimization for developing high-current-density CO2 electrolyzers. Using three typical flow fields (serpentine, parallel, and interdigitated) as tools and combining multiple characterization techniques, we investigated the principles for further flow field optimization. We recognized that optimizing the flow field involves more than enhancing CO2 distribution uniformity and ensuring no CO2 starvation. It is also necessary to provide CO2 flow-through transport while ensuring suppressed drainage behavior. Optimizing based on this principle, we fabricated a multiserpentine flow field, and it realized a high CO selectivity of about 95% at 0-350 mA cm-2 with 0.1 M KHCO3 and 50 degrees C cell temperature. Meanwhile, it achieves a high maximum CO partial current density of 409 mA cm-2, which is 43.5% higher than that of the conventional parallel flow field.
引用
收藏
页码:5945 / 5954
页数:10
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