Polymeric ionic liquids and piperidinium synergistically improve proton conductivity and acid retention of polybenzimidazole-based proton exchange membranes

被引：0
|
作者：
Guan, Xianfeng [1 ]
Yu, Di [1 ]
Luo, Yu [1 ]
Zhang, Shuyu [1 ]
Wu, Wanzhen [1 ]
Feng, Xu [3 ]
Gao, Tongtong [1 ]
Bai, Wenyu [1 ]
Wang, Shuang [1 ,2 ]
机构：
[1] Changchun Univ Technol, Sch Chem Engn, Changchun 130012, Peoples R China
[2] Changchun Univ Technol, Adv Inst Mat Sci, Changchun 130012, Peoples R China
[3] ChangChun 52ND Habile Expt Middle Sch, Changchun 130012, Peoples R China
来源：
RENEWABLE ENERGY | 2024年 / 237卷
关键词：
Ion pairs; Polymeric ionic liquid; Piperidinium; Acid stability; Proton conductivity; TEMPERATURE; STABILITY;
D O I：
10.1016/j.renene.2024.121872
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Amino-type polybenzimidazole is prepared, then ionic liquid with three nitrogen positive sites ([CTDTr]Br3) is polymerized into polymeric ionic liquids (PILs) by in-situ radical polymerization, and AmPBI-CTDTr-Px membranes were prepared by piperidinium (PPd) and [CTDTr]Br3 combination to cross-linked with AmPBI. Following treatment with KOH and phosphoric acid (PA), the ion pairs (N+- H2PO4- ) generated in the composite membrane system can enhance proton conductivity and facilitate proton transport. The AmPBI-CTDTr-Px membranes shown exceptional PA retention as a result of the alkaline properties of both [CTDTr]Br3 and PPd, which can engage in acid-base interactions with phosphoric acid. Specifically, the proton conductivity of AmPBICTDTr-P5 at 180 degrees C is 129.7 mS cm- 1 , which is 2.52 times that of pure membranes. Acid retention of AmPBICTDTr-P5 at 80 degrees C/40 % RH and 160 degrees C are 64.4 % and 84 %.
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页数：10
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