Journal
MATERIALS & DESIGN
Volume 154, Issue -, Pages 63-72Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.matdes.2018.05.024
Keywords
Functionalised titanate nanotubes; Anion exchange filler; Anion exchange membrane; Composite anion exchange membrane; Alkaline fuel cell performance
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Funding
- Council of Scientific and Industrial Research (CSIR), New Delhi, India [01(2452)/11/EMR-11, EMR/2016/ 005615]
- Science and Engineering Research Board (SERB), New Delhi, India [EMR/2016/ 005615]
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In the present study, Titanate Nano Tubes (TNT) were synthesised by hydrothermal method and functionalised with quaternary ammonium group via chloromethylation followed by amination. Quaternary ammonium functionalised TNT (QTNT) were characterized by FTIR, solid state CP/MAS C-13 and CP/MAS Si-29 for their successful chemical modification and their nano tube morphology was confirmed by XRD, SEM and TEM analyses. The synthesised QTNT was then incorporated into Quaternary ammonium functionalised Polysulfone (QPSU) at various wt% (1, 3, 5 and 7) to form high density ion exchange (OH-) composite membranes. The morphology of the synthesised membranes were also characterized by SEM and XRD. Additionally, the membranes were tested for water uptake, Ion Exchange Capacity (IEC) and hydroxyl conductivity with respect to alkaline fuel cell application. The Membrane Electrode Assembly (MEA) consisting of Pt anode, Ag cathode and various QTNT composite membranes were fabricated and tested in an in-house built fuel cell setup. From the performance study, it was inferred that the membrane with 5% QTNT showed the maximum power density of 285 mW/cm(2) at 60 degrees C. The experimental results corroborate that addition of QTNT has the propensity to increase the performance of the anion exchange membrane significantly. (c) 2018 Elsevier Ltd. All rights reserved.
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