Enhanced water transport in AEMs based on poly(styrene-ethylene-butylene-styrene) triblock copolymer for high fuel cell performance

doi:10.1039/c8py01618f

	Enhanced water transport in AEMs based on poly(styrene-ethylene-butylene-styrene) triblock copolymer for high fuel cell performance
	Xie, Feng 1,2; Shao, Zhigang 2; Gao, Xueqiang 1,2; Yu, Hongmei 2; Qin, Bowen 1,2; Jia, Jia 1,2; Hao, Jinkai 1,2
刊名	POLYMER CHEMISTRY
	2019-04-21
卷号	10 期号:15 页码:1894-1903
ISSN号	1759-9954
DOI	10.1039/c8py01618f
通讯作者	Yu, Hongmei(hmyu@dicp.ac.cn) ; Shao, Zhigang(zhgshao@dicp.ac.cn)
英文摘要	Anion exchange membrane fuel cells (AEMFCs) have received a considerable amount of attention in the past decades as a lower cost alternative to proton exchange membrane fuel cells (PEMFCs). However, limitations in performance and stability have hindered the AEMFC development, and poor water management was a major reason. In the AEMFCs, water is both electrochemically generated at the anode and consumed at the cathode during cell operation, so water transport is particularly important because of its severe intrinsic imbalance. In this work, a high conductivity and stability anion exchange membrane and a soluble, conductive ionomer based on triblock copolymer poly(styrene-ethylene-butylene-styrene) (SEBS) were synthesized successfully. The OH-conductivity of the AEM was over 0.1 S cm(-1) at 80 degrees C. Remarkably, the AEM could be stable in 1 M KOH at 60 degrees C for over 1700 h, and the conductivity decreased only 26% (from 60.77 to 44.91 mS cm(-1) at 30 degrees C). Moreover, the QASEBS AEM exhibited a good water transport property in ex situ characterization, which contributed to improving water management in AEMFCs. Besides, H-2/O-2 fuel cells with the AEMs and ionomer were operated at 60 degrees C, and the results showed that the cathode dew points and the thickness of the AEMs played a key role in the AEMFC performance, and the cathode unsaturated humidification was conducive to improving the performance, which was ascribed to the fact that the increase of the concentration gradient of water between the anode and the cathode contributed to the water back diffusion from the anode to the cathode. Moreover, the back diffusion not only relieved the flooding at the anode, but replenished water consumed at the cathode. After optimization, the AEMFC performance reached 721.7 mW cm(-2) at the cell temperature of 60 degrees C and the anode/cathode dew point of 60 degrees C/50 degrees C.
资助项目	National Natural Science Foundations of China[U1664259] ; CAS-DOE Cooperation Project[121421KYSB20160009] ; National Key Research and Development Program of China[2016YFB0101205] ; National Key Research and Development Program of China[2018YFB1502303]
WOS关键词	ANION-EXCHANGE MEMBRANE ; ELECTRODE PARAMETERS ; CATALYSTS ; STABILITY ; IONOMERS
WOS研究方向	Polymer Science
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000464406700002
资助机构	National Natural Science Foundations of China ; National Natural Science Foundations of China ; CAS-DOE Cooperation Project ; CAS-DOE Cooperation Project ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundations of China ; National Natural Science Foundations of China ; CAS-DOE Cooperation Project ; CAS-DOE Cooperation Project ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundations of China ; National Natural Science Foundations of China ; CAS-DOE Cooperation Project ; CAS-DOE Cooperation Project ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundations of China ; National Natural Science Foundations of China ; CAS-DOE Cooperation Project ; CAS-DOE Cooperation Project ; National Key Research and Development Program of China ; National Key Research and Development Program of China
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/165576]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
通讯作者	Shao, Zhigang; Yu, Hongmei
作者单位	1.Univ Chinese Acad Sci, Beijing 100039, Peoples R China 2.Chinese Acad Sci, Dalian Inst Chem Phys, Fuel Cell Syst & Engn Lab, Dalian 116023, Peoples R China
推荐引用方式 GB/T 7714	Xie, Feng,Shao, Zhigang,Gao, Xueqiang,et al. Enhanced water transport in AEMs based on poly(styrene-ethylene-butylene-styrene) triblock copolymer for high fuel cell performance[J]. POLYMER CHEMISTRY,2019,10(15):1894-1903.
APA	Xie, Feng.,Shao, Zhigang.,Gao, Xueqiang.,Yu, Hongmei.,Qin, Bowen.,...&Hao, Jinkai.(2019).Enhanced water transport in AEMs based on poly(styrene-ethylene-butylene-styrene) triblock copolymer for high fuel cell performance.POLYMER CHEMISTRY,10(15),1894-1903.
MLA	Xie, Feng,et al."Enhanced water transport in AEMs based on poly(styrene-ethylene-butylene-styrene) triblock copolymer for high fuel cell performance".POLYMER CHEMISTRY 10.15(2019):1894-1903.