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Energies 2017, 10(5), 615; doi:10.3390/en10050615

Surfactant-Assisted Perovskite Nanofillers Incorporated in Quaternized Poly (Vinyl Alcohol) Composite Membrane as an Effective Hydroxide-Conducting Electrolyte

1
Department of Chemical and Materials Engineering, and Green Technology Research Center, Chang Gung University, Guishan District, Tao-yuan 333, Taiwan
2
Department of Chemical Engineering and Battery Research Center of Green Energy, Ming Chi University of Technology, New Taipei City 24301, Taiwan
3
Department of Radiation Oncology, Chang Gung Memorial Hospital, Kwei-shan, Tao-yuan 333, Taiwan
4
Department of Safety, Health and Environmental Engineering, Ming Chi University of Technology, New Taipei City 24301, Taiwan
*
Author to whom correspondence should be addressed.
Academic Editor: Vijay Kumar Thakur
Received: 2 March 2017 / Revised: 24 April 2017 / Accepted: 28 April 2017 / Published: 2 May 2017
(This article belongs to the Section Energy Sources)
View Full-Text   |   Download PDF [4038 KB, uploaded 19 May 2017]   |  

Abstract

Perovskite LaFeO3 nanofillers (0.1%) are incorporated into a quaternized poly(vinyl alcohol) (QPVA) matrix for use as hydroxide-conducting membranes in direct alkaline methanol fuel cells (DAMFCs). The as-synthesized LaFeO3 nanofillers are amorphous and functionalized with cetyltrimethylammonium bromide (CTAB) surfactant. The annealed LaFeO3 nanofillers are crystalline without CTAB. The QPVA/CTAB-coated LaFeO3 composite membrane shows a defect-free structure while the QPVA/annealed LaFeO3 film has voids at the interfaces between the soft polymer and rigid nanofillers. The QPVA/CTAB-coated LaFeO3 composite has lower methanol permeability and higher ionic conductivity than the pure QPVA and QPVA/annealed LaFeO3 films. We suggest that the CTAB-coated LaFeO3 provides three functions to the polymeric composite: increasing polymer free volume, ammonium group contributor, and plasticizer to enhance the interfacial compatibility. The composite containing CTAB-coated LaFeO3 results in superior cell performance. A maximum power density of 272 mW cm−2 is achieved, which is among the highest power outputs reported for DAMFCs in the literature. View Full-Text
Keywords: LaFeO3 nanoparticles; surfactant functionalization; quaternized poly (vinyl alcohol); hydroxide-conduction; alkaline methanol fuel cell LaFeO3 nanoparticles; surfactant functionalization; quaternized poly (vinyl alcohol); hydroxide-conduction; alkaline methanol fuel cell
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Rajesh Kumar, S.; Ma, W.-T.; Lu, H.-C.; Teng, L.-W.; Hsu, H.-C.; Shih, C.-M.; Yang, C.-C.; Lue, S.J. Surfactant-Assisted Perovskite Nanofillers Incorporated in Quaternized Poly (Vinyl Alcohol) Composite Membrane as an Effective Hydroxide-Conducting Electrolyte. Energies 2017, 10, 615.

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