Reorientation of Magnetic Graphene Oxide Nanosheets in Crosslinked Quaternized Polyvinyl Alcohol as Effective Solid Electrolyte

Jia-Shuin Lin, Wei-Ting Ma, Chao-Ming Shih, Bor-Chern Yu, Li-Wei Teng, Yi-Chun Wang, Kong-Wei Cheng, Fang-Chyou Chiu and Shingjiang Jessie Lue
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Jia-Shuin Lin: Department of Chemical and Materials Engineering, and Green Technology Research Center, Chang Gung University, Kwei-shan, Taoyuan 333, Taiwan
Wei-Ting Ma: Department of Chemical and Materials Engineering, and Green Technology Research Center, Chang Gung University, Kwei-shan, Taoyuan 333, Taiwan
Chao-Ming Shih: Department of Chemical and Materials Engineering, and Green Technology Research Center, Chang Gung University, Kwei-shan, Taoyuan 333, Taiwan
Bor-Chern Yu: Department of Chemical and Materials Engineering, and Green Technology Research Center, Chang Gung University, Kwei-shan, Taoyuan 333, Taiwan
Li-Wei Teng: Department of Chemical and Materials Engineering, and Green Technology Research Center, Chang Gung University, Kwei-shan, Taoyuan 333, Taiwan
Yi-Chun Wang: Department of Chemical and Materials Engineering, and Green Technology Research Center, Chang Gung University, Kwei-shan, Taoyuan 333, Taiwan
Kong-Wei Cheng: Department of Chemical and Materials Engineering, and Green Technology Research Center, Chang Gung University, Kwei-shan, Taoyuan 333, Taiwan
Fang-Chyou Chiu: Department of Chemical and Materials Engineering, and Green Technology Research Center, Chang Gung University, Kwei-shan, Taoyuan 333, Taiwan
Shingjiang Jessie Lue: Department of Chemical and Materials Engineering, and Green Technology Research Center, Chang Gung University, Kwei-shan, Taoyuan 333, Taiwan

Energies, 2016, vol. 9, issue 12, 1-13

Abstract: This work aims to clarify the effect of magnetic graphene oxide (GO) reorientation in a polymer matrix on the ionic conduction and methanol barrier properties of nanocomposite membrane electrolytes. Magnetic iron oxide (Fe 3 O 4 ) nanoparticles were prepared and dispersed on GO nanosheets (GO-Fe 3 O 4 ). The magnetic GO-Fe 3 O 4 was imbedded into a quaternized polyvinyl alcohol (QPVA) matrix and crosslinked (CL-) with glutaraldehyde (GA) to obtain a polymeric nanocomposite. A magnetic field was applied in the through-plane direction during the drying and film formation steps. The CL-QPVA/GO-Fe 3 O 4 nanocomposite membranes were doped with an alkali to obtain hydroxide-conducting electrolytes for direct methanol alkaline fuel cell (DMAFC) applications. The magnetic field-reoriented CL-QPVA/GO-Fe 3 O 4 electrolyte demonstrated higher conductivity and lower methanol permeability than the unoriented CL-QPVA/GO-Fe 3 O 4 membrane or the CL-QPVA film. The reoriented CL-QPVA/GO-Fe 3 O 4 nanocomposite was used as the electrolyte in a DMAFC and resulted in a maximum power density of 55.4 mW·cm ?2 at 60 °C, which is 73.7% higher than that of the composite without the magnetic field treatment (31.9 mW·cm ?2 ). In contrast, the DMAFC using the CL-QPVA electrolyte generated only 22.4 mW·cm ?2 . This research proved the surprising benefits of magnetic-field-assisted orientation of GO-Fe 3 O 4 in facilitating the ion conduction of a polymeric electrolyte.

Keywords: graphene oxide-iron oxide (GO-Fe 3 O 4 ); crosslinked quaternized polyvinyl alcohol (CL-QPVA); magnetic field; reorientation; direct methanol alkaline fuel cell (DMAFC) (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2016
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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