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首页> 外文期刊>Journal of power sources >Cross-linked amphoteric membrane: Sulphonated poly (ether ether ketone) grafted with 2,4,6-tris(dimethylaminomethyl)phenol using functionalized side chain spacers for vanadium redox flow battery
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Cross-linked amphoteric membrane: Sulphonated poly (ether ether ketone) grafted with 2,4,6-tris(dimethylaminomethyl)phenol using functionalized side chain spacers for vanadium redox flow battery

机译：交联的两性膜：使用功能化侧链间隔基接枝2,4,6-三（二甲基氨基甲基）苯酚的磺化聚醚醚酮，用于钒氧化还原液流电池

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Herein, we report a novel synthesis of sulphonated poly(ether ether ketone) (SPK) grafted with 2,4,6-tris(dimethylaminomethyl)phenol (TAP) for preparation of amphoteric ion-exchange membrane (AIEM). Cross-linking has been achieved by using di-bromo alkane with different number of carbon chains (C6 & C10), and different AIEMs are assessed for vanadium redox flow battery (VRFB). These AIEMs are architected to contain -SO3H groups maintained conductivity, while -NH3+ groups for reduction in vanadium permeability with improve chargedischarge time via acid-base interactions, Structural and surface morphology of AIEMs have been elucidated by different spectral techniques (FTIR, H-1 NMR, SEM, and AFM). Cross-linking and acid-base interactions effectively reduced water uptake, swelling ratio, VO+2 permeability and improved ion-exchange capacity, conductivity, along with membrane stabilities. Due to good synergy between conductivity and VO+2 permeability, cross-linked AIEM with six number of carbon chains (CQSPK-6) exhibited higher Coulombic (CE: 98.4% vs 91.2%) and energy efficiency (81.4% vs similar to 76%) than Nafion 117 membrane at 60 mA cm(-2) in single cell VRFB. Further, CQSPK-6 AIEM maintained stable performance during in-sine cycle test (100 cycles) at 60 mA cm(-2). Hence, AIEM based on cross-linked SPK grafted with high molality of functional groups via side chain spacer is a promising candidate for an efficient VRFB system.
机译：在这里，我们报告了一种新型合成的磺化聚醚醚酮（SPK），接枝了2,4,6-三（二甲基氨基甲基）苯酚（TAP），用于制备两性离子交换膜（AIEM）。通过使用具有不同碳链数的二溴代烷烃（C6和C10）实现了交联，并且对钒氧化还原液流电池（VRFB）评估了不同的AIEM。这些AIEM被设计为包含-SO3H基团，保持电导率，而-NH3 +基团通过酸碱相互作用降低钒的渗透性，并通过改善的荷电放电时间来改善其结构和表面形态。已通过不同的光谱技术（FTIR，H-1 NMR，SEM和AFM）。交联和酸碱相互作用有效降低了水分吸收，溶胀率，VO + 2渗透性，并改善了离子交换能力，电导率以及膜的稳定性。由于电导率和VO + 2渗透性之间具有良好的协同作用，具有六个碳链数（CQSPK-6）的交联AIEM表现出更高的库仑（CE：98.4％vs 91.2％）和能源效率（81.4％vs相似至76％） ）比Nafion 117膜在60 mA cm（-2）的单电池VRFB中。此外，CQSPK-6 AIEM在60 mA cm（-2）的正弦循环测试（100个循环）中保持稳定的性能。因此，基于通过侧链间隔基与高摩尔官能团接枝的交联SPK的AIEM是有效VRFB系统的有希望的候选者。

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