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Journal of Polymer Research
Published in: Journal of Polymer Research 5/2019

01-05-2019 | ORIGINAL PAPER

Nafion®/ sulfated zirconia oxide-nanocomposite membrane: the effects of ammonia sulfate on fuel permeability

Authors: Rudzani Sigwadi, Touhami Mokrani, Mokhotjwa S. Dhlamini, Patrick Nonjola, Phumlani F. Msomi

Published in: Journal of Polymer Research | Issue 5/2019

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Abstract

Nafion®/sulfated zirconium nanocomposite membranes were prepared by incorporating sulfonated zirconia with ammonia sulfate and sulphuric acid, which enhances proton conductivity and reduces fuel crossover on Nafion® membrane as they sustain water affinity and strong acidity. XRD, AFM, SEM, FTIR and TGA were used to investigate the morphology and high temperature degradation of nanocomposite membranes compared with commercial Nafion® 117 membrane. The results show that nanocomposite membranes have low water content angle, improved thermal degradation and higher conductivity than commercial Nafion® 117 membrane, which holds great promise for fuel cell application. The Nafion®/ sulfated zirconia nanocomposite membrane obtained a higher IEC and water uptake due to the presence of SO42− providing extra acid sites for water diffusion. The proton conductivity calculated from impedance spectroscopy measurements were 7.891 S/cm and 0.146 S/cm, respectively, when compared with 0.113 S/cm of commercial Nafion® 117 membrane. The Nafion®/sulfated zirconium nanocomposite membranes showed a highest power density of 183 m. cm−2 when evaluated using a direct single cell methanol fuel cell.
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Metadata
Title
Nafion®/ sulfated zirconia oxide-nanocomposite membrane: the effects of ammonia sulfate on fuel permeability
Authors
Rudzani Sigwadi
Touhami Mokrani
Mokhotjwa S. Dhlamini
Patrick Nonjola
Phumlani F. Msomi
Publication date
01-05-2019
Publisher
Springer Netherlands
Published in
Journal of Polymer Research / Issue 5/2019
Print ISSN: 1022-9760
Electronic ISSN: 1572-8935
DOI
https://doi.org/10.1007/s10965-019-1760-2

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