期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 46, 期 22, 页码 12254-12262出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2020.02.193
关键词
Polymer composite; Proton exchange membrane; Polybenzimidazole; Graphene oxide; HT-PEMFC
资金
- National Research Foundation of Korea - Korean Government [NRF-2015M1A2A2056729, NRF-2019M3E6A1064797]
- National Research Foundation of Korea [2019M3E6A1064797, 2015M1A2A2056729, 4120200413705] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
By using ImGO as a filler, the PBI composite membrane shows improved mechanical properties and proton conductivity compared to traditional filler GO. The compatibility of ImGO with PBI matrix is better, resulting in better overall performance of the membrane.
Polymer composite membranes are fabricated using poly[2,2'-(m-phenylene)-5,5'-bibenzimidazole] (PBI) as a polymer matrix and imidazole functionalized graphene oxide (ImGO) as a filler material for high temperature proton exchange membrane fuel cell applications. ImGO is prepared by the reaction of o-phenylenediamine with graphene oxide (GO). The compatibility of ImGO with PBI matrix is found to be better than that of GO, and as a result PBI composite membrane having ImGO exhibits improved physicochemical properties and larger proton conductivity compared with pure PBI and PBI composite membrane having GO. For example, PBI composite membrane having 0.5 wt% of ImGO shows enhanced tensile strength (219.2 MPa) with minimal decrease of elongation at break value (28.8%) compared with PBI composite membrane having 0.5 wt% of GO (215.5 MPa, 15.4%) and pure PBI membrane without any filler (181.0 MPa, 34.8%). The proton conductivity of this membrane, at 150 degrees C under anhydrous condition, is 77.52 mS cm(-1). (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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