Constructing proton-conductive highways within an ionomer membrane by embedding sulfonated polymer brush modified graphene oxide
© 2015 Elsevier B.V. All rights reserved. Abstract Sulfonated polymer brush modified graphene oxide (SP-GO) fillers with controllable brush length are synthesized via the facile distillation-precipitation polymerization, and then incorporated into sulfonated poly(ether ether ketone) (SPEEK) matrix t...
| Main Authors: | , , , , , |
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| Format: | Journal Article |
| Published: |
Elsevier SA
2015
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| Online Access: | http://hdl.handle.net/20.500.11937/73437 |
| _version_ | 1848763013247533056 |
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| author | Zhao, L. Li, Y. Zhang, H. Wu, W. Liu, Jian Wang, J. |
| author_facet | Zhao, L. Li, Y. Zhang, H. Wu, W. Liu, Jian Wang, J. |
| author_sort | Zhao, L. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | © 2015 Elsevier B.V. All rights reserved. Abstract Sulfonated polymer brush modified graphene oxide (SP-GO) fillers with controllable brush length are synthesized via the facile distillation-precipitation polymerization, and then incorporated into sulfonated poly(ether ether ketone) (SPEEK) matrix to fabricate composite membranes. The influences of SP-GO upon the microstructures, including thermal and mechanical properties, water uptake/swelling, proton conduction, H<inf>2</inf> permeability and single PEMFC performances of composite membranes are intensively investigated. It is found that the SP-GO fillers are uniformly dispersed and tend to lie perpendicularly to the cross-section surface of the whole membrane, which allow SP-GO fillers creating inter-connected and broad ionic pathways through the sulfonic acid groups in polymer brushes. Meanwhile, the SP-GO fillers connect the ionic clusters in SPEEK matrix via interfacial interactions. In such a way, proton-transfer highways are constructed along the SPEEK/SP-GO interface, which lower the proton transfer activation energy and enhance the proton conductivities of the composite membranes under both hydrated and anhydrous conditions. Furthermore, elevating the brush length on SP-GO could further enhance the proton conductivity. Compared to SPEEK control membrane, a 95.5% increase in hydrated conductivity, an 178% increase in anhydrous conductivity and a 37% increase in maximum power density are obtained for the optimal composite membrane. |
| first_indexed | 2025-11-14T10:56:42Z |
| format | Journal Article |
| id | curtin-20.500.11937-73437 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:56:42Z |
| publishDate | 2015 |
| publisher | Elsevier SA |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-734372018-12-14T01:02:56Z Constructing proton-conductive highways within an ionomer membrane by embedding sulfonated polymer brush modified graphene oxide Zhao, L. Li, Y. Zhang, H. Wu, W. Liu, Jian Wang, J. © 2015 Elsevier B.V. All rights reserved. Abstract Sulfonated polymer brush modified graphene oxide (SP-GO) fillers with controllable brush length are synthesized via the facile distillation-precipitation polymerization, and then incorporated into sulfonated poly(ether ether ketone) (SPEEK) matrix to fabricate composite membranes. The influences of SP-GO upon the microstructures, including thermal and mechanical properties, water uptake/swelling, proton conduction, H<inf>2</inf> permeability and single PEMFC performances of composite membranes are intensively investigated. It is found that the SP-GO fillers are uniformly dispersed and tend to lie perpendicularly to the cross-section surface of the whole membrane, which allow SP-GO fillers creating inter-connected and broad ionic pathways through the sulfonic acid groups in polymer brushes. Meanwhile, the SP-GO fillers connect the ionic clusters in SPEEK matrix via interfacial interactions. In such a way, proton-transfer highways are constructed along the SPEEK/SP-GO interface, which lower the proton transfer activation energy and enhance the proton conductivities of the composite membranes under both hydrated and anhydrous conditions. Furthermore, elevating the brush length on SP-GO could further enhance the proton conductivity. Compared to SPEEK control membrane, a 95.5% increase in hydrated conductivity, an 178% increase in anhydrous conductivity and a 37% increase in maximum power density are obtained for the optimal composite membrane. 2015 Journal Article http://hdl.handle.net/20.500.11937/73437 10.1016/j.jpowsour.2015.04.005 Elsevier SA restricted |
| spellingShingle | Zhao, L. Li, Y. Zhang, H. Wu, W. Liu, Jian Wang, J. Constructing proton-conductive highways within an ionomer membrane by embedding sulfonated polymer brush modified graphene oxide |
| title | Constructing proton-conductive highways within an ionomer membrane by embedding sulfonated polymer brush modified graphene oxide |
| title_full | Constructing proton-conductive highways within an ionomer membrane by embedding sulfonated polymer brush modified graphene oxide |
| title_fullStr | Constructing proton-conductive highways within an ionomer membrane by embedding sulfonated polymer brush modified graphene oxide |
| title_full_unstemmed | Constructing proton-conductive highways within an ionomer membrane by embedding sulfonated polymer brush modified graphene oxide |
| title_short | Constructing proton-conductive highways within an ionomer membrane by embedding sulfonated polymer brush modified graphene oxide |
| title_sort | constructing proton-conductive highways within an ionomer membrane by embedding sulfonated polymer brush modified graphene oxide |
| url | http://hdl.handle.net/20.500.11937/73437 |