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首页> 外文期刊>RSC Advances >A sulfonated poly(ether ether ketone)/amine-functionalized graphene oxide hybrid membrane for vanadium redox flow batteries
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A sulfonated poly(ether ether ketone)/amine-functionalized graphene oxide hybrid membrane for vanadium redox flow batteries

机译：钒氧化还原液流电池用磺化聚醚醚酮/胺官能化氧化石墨烯杂化膜

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摘要

A series of hybrid membranes (SPEEK/PPD-GO) based on sulfonated poly(ether ether ketone) (SPEEK) and p-phenylene diamine-functionalized graphene oxide (PPD-GO) are prepared by a solution-casting method for vanadium redox flow batteries (VRB). The physicochemical properties such as water uptake, swelling ratio, ion exchange capacity, proton conductivity and vanadium ion permeability of SPEEK hybrid membranes are well controlled by the incorporated PPD-GO nanofillers. SPEEK/PPD-GO hybrid membranes show higher coulombic efficiency (CE, 96.9%) and energy efficiency (EE, 82.8%) at 30 mA cm(-2) than Nafion 117 membrane (CE, 89% and EE, 72.5%). The self-discharge time of the SPEEK/PPD-GO-1 hybrid membrane (56 h) is longer than that of the Nafion 117 membrane (26 h), demonstrating its excellent vanadium ion selectivity. Moreover, the SPEEK/PPD-GO membrane exhibits a stable operation performance for up to 100 cycles, accompanied with no significant decay in CE and EE. The present experimental results demonstrate that it is a feasible method by controlling the interfacial interaction to realize a high performance hybrid membrane for VRB systems.
机译：通过溶液浇铸法制备钒氧化还原流的一系列基于磺化聚醚醚酮（SPEEK）和对苯二胺功能化氧化石墨烯（PPD-GO）的杂化膜（SPEEK / PPD-GO）。电池（VRB）。掺入的PPD-GO纳米填料可以很好地控制SPEEK杂化膜的理化性质，例如吸水率，溶胀率，离子交换容量，质子传导性和钒离子渗透性。 SPEEK / PPD-GO混合膜在30 mA cm（-2）时显示出比Nafion 117膜更高的库仑效率（CE，96.9％）和能量效率（EE，82.8％）（CE，89％和EE，72.5％）。 SPEEK / PPD-GO-1杂化膜的自放电时间（56小时）比Nafion 117膜的自放电时间（26小时）长，这表明它具有极好的钒离子选择性。此外，SPEEK / PPD-GO膜在长达100个循环中表现出稳定的运行性能，并且CE和EE均无明显衰减。目前的实验结果表明，通过控制界面相互作用来实现用于VRB系统的高性能混合膜是一种可行的方法。

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