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In situ implantation of cross-linked functional POSS blocks in Nafion® for high performance direct methanol fuel cells
Journal of Membrane Science ( IF 8.4 ) Pub Date : 2021-09-03 , DOI: 10.1016/j.memsci.2021.119798
Zhen Li 1 , Xiaofeng Hao 1 , Geng Cheng 1 , Sheng Huang 1 , Dongmei Han 1, 2 , Min Xiao 1 , Shuanjin Wang 1 , Yuezhong Meng 1
Affiliation  

Polyhedral oligomeric silsesquioxane (POSS) has attracted increasing attention because of its organic/inorganic, nanosize, easily functional nature, especially in the applications of direct methanol fuel cells (DMFCs). In this work, we have successfully synthesized a novel bifunctional POSS (Vi-POSS-SO3Na) with vinyl and sulfonic acid groups by thiol-ene click reaction. Vi-POSS-SO3Na was introduced into Nafion® matrix and cross-linked by in-situ simply thermal treatment. The implantation of the bifunctional POSS filler gives significant improvements in the performance of such proton exchange membranes (PEMs). The cross-linked hybrid membrane with 12 wt% of Vi-POSS-SO3Na (X-Nafion@POSS-12) has a high proton conductivity (121 mS cm−1) at 80 °C, excellent dimensional stability and the lowest methanol permeability (5.4 × 10−8 cm2 s−1). The highest power density of the DMFCs was obtained by using the X-Nafion@POSS-12 as PEM in DMFC at 80 °C, and its value (34.93 mW cm−2) is twice higher than that of Nafion 212 membrane (14.90 mW cm−2). The novel in-situ fabrication method gives a simple and potential approach for the preparation of PEMs used in DMFCs.



中文翻译:

在 Nafion® 中原位植入交联的功能性 POSS 块,用于高性能直接甲醇燃料电池

多面体低聚倍半硅氧烷 (POSS) 因其有机/无机、纳米尺寸、易于功能的性质而受到越来越多的关注,特别是在直接甲醇燃料电池 (DMFC) 的应用中。在这项工作中,我们通过硫醇-烯点击反应成功地合成了一种具有乙烯基和磺酸基团的新型双功能 POSS ( Vi -POSS-SO 3 Na)。Vi -POSS-SO 3 Na 被引入到 Nafion® 基质中,并通过原位简单的热处理进行交联。双功能 POSS 填料的植入显着改善了这种质子交换膜 (PEM) 的性能。12 wt% Vi -POSS-SO 3的交联杂化膜Na ( X -Nafion@POSS-12)在 80 °C 下具有高质子传导率 (121 mS cm -1 )、优异的尺寸稳定性和最低的甲醇渗透率 (5.4 × 10 -8 cm 2 s -1 )。DMFCs的最高功率密度是在 80°C下使用X -Nafion@POSS-12 作为 DMFC 中的 PEM 获得的,其值 (34.93 mW cm -2 ) 是 Nafion 212 膜 (14.90 mW) 的两倍厘米-2 )。新的原位制造方法为制备用于 DMFC 的 PEM 提供了一种简单且具有潜力的方法。

更新日期:2021-09-09
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