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Ultrahigh Ion-Selective and Durable Nafion-NdZr Composite Layer Membranes for All-Vanadium Redox Flow Batteries
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2020-01-21 , DOI: 10.1021/acssuschemeng.9b06541 Syed Imdadul Hossain 1 , Md. Abdul Aziz 1 , Sangaraju Shanmugam 1
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2020-01-21 , DOI: 10.1021/acssuschemeng.9b06541 Syed Imdadul Hossain 1 , Md. Abdul Aziz 1 , Sangaraju Shanmugam 1
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A thin Nafion-neodymium zirconium oxide nanotube (NdZr) composite (Nafion-NdZr) membrane has been fabricated and further modified by the polycation, poly(diallyldimethylammonium chloride) (PDDA), and polyanion, poly(sodium styrene sulfonate) (PSS). The ion selectivity of the Nafion-NdZr (1%)/[P-S]2 composite layer membrane was found to be 6.9, 3.5, and 2.3 times higher than those of recast Nafion, Nafion/[P-S]2 layer, and Nafion-NdZr (1%) composite membranes, respectively. As a result, the vanadium redox flow batteries (VFBs) assembled with Nafion-NdZr (1%) composite and Nafion-NdZr (1%)/[P-S]2 composite layer membranes have surpassed the VFB performance operated with recast Nafion and Nafion/[P-S]2 layer membranes. Noticeably, VFB operated with the Nafion-NdZr (1%)/[P-S]2 composite layer membrane (513.7 h) exhibited a longer self-discharge time than those with Nafion-NdZr (1%) (293.2 h), Nafion/[P-S]2 (124.1 h), and recast Nafion (32.7 h) membranes. Finally, the single VFB cell constructed with Nafion-NdZr (1%)/[P-S]2 and Nafion-NdZr (1%) membranes remarkably showed 80.1 and 73.4% capacity retention, respectively, over 200 charge–discharge cycles, whereas recast Nafion exhibited a 41.5% capacity retention over 100 cycles at a 40 mA cm–2 current density. The structure and morphology of the Nd2Zr2O7 nanotube, Nafion-NdZr composite, and Nafion-NdZr (1%)/[P-S]2 composite layer membranes were investigated by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, Fourier transform infrared, and atomic force microscopy analyses. Longer cyclic performance and excellent oxidative, chemical, and thermal stability further prove the durability of proposed membranes.
中文翻译：
适用于全钒氧化还原液流电池的超高离子选择性和耐用性Nafion-NdZr复合层膜
已经制造了Nafion-钕氧化锆纳米管（Nafion-NdZr）复合薄膜，并通过聚阳离子聚二烯丙基二甲基氯化铵（PDDA）和聚阴离子聚苯乙烯磺酸钠（PSS）对其进行了进一步改性。发现Nafion-NdZr（1％）/ [PS] 2复合层膜的离子选择性分别比重铸的Nafion，Nafion / [PS] 2层和Nafion-NdZr高6.9、3.5和2.3倍（1％）复合膜。结果，由Nafion-NdZr（1％）复合材料和Nafion-NdZr（1％）/ [PS] 2复合层膜组装而成的钒氧化还原液流电池（VFB）超过了重铸Nafion和Nafion / [PS] 2层膜。值得注意的是，与Nafion-NdZr（1％）/ [PS] 2复合层膜（513.7 h）相比，VFB的自放电时间比Nafion-NdZr（1％）（293.2 h），Nafion / [ PS] 2（124.1 h）和重铸Nafion（32.7 h）膜。最后，用Nafion-NdZr（1％）/ [PS] 2和Nafion-NdZr（1％）膜构建的单个VFB电池在200个充放电循环中分别显示出80.1和73.4％的容量保持率，而重铸Nafion在40 mA cm –2的电流密度下，在100个循环中显示出41.5％的容量保持率。Nd 2 Zr 2 O 7的结构和形态通过扫描电子显微镜，透射电子显微镜，X射线衍射，傅立叶变换红外和原子力显微镜分析研究了纳米管，Nafion-NdZr复合材料和Nafion-NdZr（1％）/ [PS] 2复合层膜。更长的循环性能以及出色的氧化，化学和热稳定性进一步证明了所提出膜的耐久性。
更新日期：2020-01-22
中文翻译：
适用于全钒氧化还原液流电池的超高离子选择性和耐用性Nafion-NdZr复合层膜
已经制造了Nafion-钕氧化锆纳米管（Nafion-NdZr）复合薄膜，并通过聚阳离子聚二烯丙基二甲基氯化铵（PDDA）和聚阴离子聚苯乙烯磺酸钠（PSS）对其进行了进一步改性。发现Nafion-NdZr（1％）/ [PS] 2复合层膜的离子选择性分别比重铸的Nafion，Nafion / [PS] 2层和Nafion-NdZr高6.9、3.5和2.3倍（1％）复合膜。结果，由Nafion-NdZr（1％）复合材料和Nafion-NdZr（1％）/ [PS] 2复合层膜组装而成的钒氧化还原液流电池（VFB）超过了重铸Nafion和Nafion / [PS] 2层膜。值得注意的是，与Nafion-NdZr（1％）/ [PS] 2复合层膜（513.7 h）相比，VFB的自放电时间比Nafion-NdZr（1％）（293.2 h），Nafion / [ PS] 2（124.1 h）和重铸Nafion（32.7 h）膜。最后，用Nafion-NdZr（1％）/ [PS] 2和Nafion-NdZr（1％）膜构建的单个VFB电池在200个充放电循环中分别显示出80.1和73.4％的容量保持率，而重铸Nafion在40 mA cm –2的电流密度下，在100个循环中显示出41.5％的容量保持率。Nd 2 Zr 2 O 7的结构和形态通过扫描电子显微镜，透射电子显微镜，X射线衍射，傅立叶变换红外和原子力显微镜分析研究了纳米管，Nafion-NdZr复合材料和Nafion-NdZr（1％）/ [PS] 2复合层膜。更长的循环性能以及出色的氧化，化学和热稳定性进一步证明了所提出膜的耐久性。
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