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Issue 102, 2016, Issue in Progress
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A sulfonated poly(ether ether ketone)/amine-functionalized graphene oxide hybrid membrane for vanadium redox flow batteries

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Abstract

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.

Graphical abstract: A sulfonated poly(ether ether ketone)/amine-functionalized graphene oxide hybrid membrane for vanadium redox flow batteries

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Publication details

The article was received on 11 Sep 2016, accepted on 15 Oct 2016 and first published on 17 Oct 2016


Article type: Paper
DOI: 10.1039/C6RA22665E
Citation: RSC Adv., 2016,6, 100262-100270
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    A sulfonated poly(ether ether ketone)/amine-functionalized graphene oxide hybrid membrane for vanadium redox flow batteries

    L. Kong, L. Zheng, R. Niu, H. Wang and H. Shi, RSC Adv., 2016, 6, 100262
    DOI: 10.1039/C6RA22665E

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