Unveiling the role of gas permeability in air cathodes and performance enhancement by waterproof membrane fabricating method

doi:10.1016/j.jpowsour.2019.227570

CORC > 重庆绿色智能技术研究院 > 中国科学院重庆绿色智能技术研究院 > 水污染过程与治理研究中心

	Unveiling the role of gas permeability in air cathodes and performance enhancement by waterproof membrane fabricating method
	Yin, Fengjun 1,2; Hu, Pin 1; Song, Cheng 1; Wang, Sha 1; Liu, Hong 1
刊名	JOURNAL OF POWER SOURCES
	2020-02-15
卷号	449 页码:9
关键词	Air cathode Gas permeability Oxygen reduction reaction Rate limiting process Waterproof membrane
ISSN号	0378-7753
DOI	10.1016/j.jpowsour.2019.227570
通讯作者	Liu, Hong(liuhong@cigit.ac.cn)
英文摘要	Air cathode is the most popular oxygen reduction reaction (ORR) cathode with various applications in energy conversion and environmental purification. Understanding the role of gas permeability in air cathodes is crucial for its fabrication and operation optimizations. Herein, the correlations between gas permeability and performance are investigated by two experimental setups. One measures the gas permeability and the other evaluates the pressure-dependent performance. The results show two distinct ORR performances with respect to the gas permeability. The performance in low gas permeability is shown to depend on the gas permeability, oxygen partial pressure and solution convection, with obvious limiting current observed. Once the gas permeability surpasses a threshold value, suggested as 2 x 10(-12) m, the performance becomes less dependent on those factors, without limiting current observed. These observations are further mathematically demonstrated by the rate limiting process based on an oxygen transport model of air cathodes. An appropriately high gas permeability can eliminate the oxygen gas transport limitation and is vital for the performance enhancement. Following this principle, a novel waterproof membrane-based air cathode with high gas permeability is proposed, enabling cost savings in operation and production, and thus has great potential in practice.
资助项目	National Natural Science Foundation of China[51525805] ; National Natural Science Foundation of China[51727812] ; National Natural Science Foundation of China[51808526]
WOS研究方向	Chemistry ; Electrochemistry ; Energy & Fuels ; Materials Science
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000510947000048
内容类型	期刊论文
源URL	[http://119.78.100.138/handle/2HOD01W0/9861]
专题	水污染过程与治理研究中心
通讯作者	Liu, Hong
作者单位	1.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Key Lab Reservoir Aquat Environm, Chongqing 400714, Peoples R China 2.China Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Yin, Fengjun,Hu, Pin,Song, Cheng,et al. Unveiling the role of gas permeability in air cathodes and performance enhancement by waterproof membrane fabricating method[J]. JOURNAL OF POWER SOURCES,2020,449:9.
APA	Yin, Fengjun,Hu, Pin,Song, Cheng,Wang, Sha,&Liu, Hong.(2020).Unveiling the role of gas permeability in air cathodes and performance enhancement by waterproof membrane fabricating method.JOURNAL OF POWER SOURCES,449,9.
MLA	Yin, Fengjun,et al."Unveiling the role of gas permeability in air cathodes and performance enhancement by waterproof membrane fabricating method".JOURNAL OF POWER SOURCES 449(2020):9.