Mechanically robust and highly conductive semi-interpenetrating network anion exchange membranes for fuel cell applications

被引:31
作者
Han, Juanjuan [1 ]
Liu, Chifeng [1 ]
Deng, Cuiwen [1 ]
Zhang, Yangyang [1 ]
Song, Wenfeng [1 ]
Zheng, Xiumeng [1 ]
Liu, Xia [1 ]
Zhang, Yanmin [1 ]
Yang, Xiaohong [1 ]
Ren, Zhandong [1 ]
Hu, Meixue [2 ]
Xiao, Li [2 ]
Zhuang, Lin [2 ]
机构
[1] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Peoples R China
[2] Wuhan Univ, Coll Chem & Mol Sci, Hubei Key Lab Electrochem Power Sources, Wuhan 430072, Peoples R China
基金
中国国家自然科学基金;
关键词
Semi -interpenetrating network; Anion exchange membrane; Hydroxide conductivity; Mechanical property; Fuel cell; TRIBLOCK COPOLYMER; LONG-CHAIN; W CM(-2); PERFORMANCE; STABILITY; BACKBONES; HYDROGEN;
D O I
10.1016/j.jpowsour.2022.232097
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
A series of highly transparent semi-interpenetrating polymer network anion exchange membranes (SIPN AEMs) composed of a flexible and cation cross-linked polystyrene-b-poly(ethylene-co-butylene)-b-polystyrene (cQSEBS) component, and a rigid, highly-charged quaternized poly(2,6-dimethyl phenylene oxide) (QPPO) component are prepared. Flexible and rigid polymer backbones endow SIPN AEMs with excellent flexibility and mechanical strength. High charge content and well defined hydrophilic/hydrophobic phase separation patterns ensure SIPN AEMs with improved ionic conductivity. Alkali-resistant SEBS, enhanced dimensional stability and ordered microphase separation morphology contribute to the good chemical stability of SIPN-AEMs. Among these AEMs, SIPN-cQSEBS/QPPO-10 with an IEC of 1.93 mmol g-1 achieves a better trade-off between tensile strength (19.36 MPa at 25 degrees C in wet state), flexibility (58.43% at 25 degrees C in wet state) and OH- conductivity (103.1 mS cm -1 at 80 degrees C). Besides, SIPN-cQSEBS/QPPO-10 shows low swelling degree (15.4% at 80 degrees C) and high chemical stability (95.9%, 88.7%, 82.7% and 88.5% retention in weight, OH- conductivity, tensile strength and elongation at break, respectively, after immersing in 1 M NaOH at 80 degrees C for 30 days). Importantly, a fuel cell peak power density of 1.174 W cm-2 is obtained at 80 degrees C by using SIPN-cQSEBS/QPPO-10 as the separator.
引用
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页数:11
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