umu.sePublications
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Evaluation of Fluorine and Sulfonic Acid Co-functionalized Graphene Oxide Membranes in Hydrogen Proton Exchange Membrane Fuel Cell Conditions
Umeå University, Faculty of Science and Technology, Department of Physics.ORCID iD: 0000-0002-6830-2174
Umeå University, Faculty of Science and Technology, Department of Physics.ORCID iD: 0000-0002-5210-2645
Umeå University, Faculty of Science and Technology, Department of Physics.
Umeå University, Faculty of Science and Technology, Department of Physics.
Show others and affiliations
2019 (English)In: Sustainable Energy & Fuels, ISSN 2398-4902, Vol. 3, no 7, p. 1790-1798Article in journal (Refereed) Published
Abstract [en]

The use of graphene oxide (GO) based membranes consisting of self-assembled flakes with a lamellar structure represents an intriguing strategy to spatially separate reactants while facilitating proton transport in proton exchange membranes (PEM). Here we chemically modify GO to evaluate the role of fluorine and sulfonic acid groups on the performance of H2/O2 based PEM fuel cells. Mild fluorination is achieved by the presence of hydrogen fluoride during oxidation and subsequent sulfonation resulted in fluorine and SO3- co-functionalized GO. Membrane electrode assembly performance in low temperature and moderate humidity conditions suggested that both functional groups contribute to reduced H2 crossover compared to appropriate reference membranes. Moreover, fluorine groups promoted an enhanced hydrolytic stability while contributing to prevent structural degradation after constant potential experiments whereas sulfonic acid demonstrated a stabilizing effect by preserving proton conductivity.

Place, publisher, year, edition, pages
Royal Society of Medicine Press, 2019. Vol. 3, no 7, p. 1790-1798
Keywords [en]
Proton exchange membrane, Fuel Cell, Graphene oxide, Hydrogen, Fluorine, Sulfonic acid
National Category
Nano Technology Other Chemical Engineering Other Materials Engineering Energy Systems
Research subject
nanomaterials
Identifiers
URN: urn:nbn:se:umu:diva-158496DOI: 10.1039/C9SE00126CISI: 000472980200014OAI: oai:DiVA.org:umu-158496DiVA, id: diva2:1307784
Funder
Swedish Research Council, 2017-04862Swedish Energy Agency, 45419-1ÅForsk (Ångpanneföreningen's Foundation for Research and Development), 15-483Interreg Nord
Note

Originally included in thesis in manuscript form

Available from: 2019-04-29 Created: 2019-04-29 Last updated: 2019-08-05Bibliographically approved
In thesis
1. Innovations in nanomaterials for proton exchange membrane fuel cells
Open this publication in new window or tab >>Innovations in nanomaterials for proton exchange membrane fuel cells
2019 (English)Doctoral thesis, comprehensive summary (Other academic)
Alternative title[sv]
Utveckling av nanomaterial för polymerelektrolytbränsleceller
Abstract [en]

Hydrogen technologies are rapidly receiving increased attention as it offers a renewable energy alternative to the current petroleum-based fuel infrastructure, considering that continued large-scale use of such fossil fuels will lead to disastrous impacts on our environment. The proton exchange membrane fuel cell should play a significant role in a hydrogen economy since it enables convenient and direct conversion of hydrogen into electricity, thus allowing the use of hydrogen in applications particularly suited for the transportation industry. To fully realize this, multiple engineering challenges as well as development of advanced nanomaterials must however be addressed.

In this thesis, we present discoveries of new innovative nanomaterials for proton exchange membrane fuel cells by targeting the entire membrane electrode assembly. Conceptually, we first propose new fabrication techniques of gas diffusion electrodes based on helical carbon nanofibers, where an enhanced three-phase boundary was noted in particular for hierarchical structures. The cathode catalyst, responsible for facilitating the sluggish oxygen reduction reaction, was further improved by the synthesis of platinum-based nanoparticles with an incorporated secondary metal (iron, yttrium and cobalt). Here, both solvothermal and high-temperature microwave syntheses were employed. Catalytic activities were improved compared to pure platinum and could be attributed to favorably shifted oxygen adsorption energies as a result of successful incorporation of the non-precious metal. As best exemplified by platinum-iron nanoparticles, the oxygen reduction reaction was highly sensitive to both metal composition and the type of crystal structure. Finally, a proton exchange membrane based on fluorine and sulfonic acid functionalized graphene oxide was prepared and tested in hydrogen fuel cell conditions, showing improvements such as lowered hydrogen permeation and better structural stability. Consequently, we have demonstrated that there is room for improvement of multiple components, suggesting that more powerful fuel cells can likely be anticipated in the future.

Place, publisher, year, edition, pages
Umeå: Umeå University, 2019. p. 88
Keywords
Fuel Cells, Membrane Electrode Assembly, Oxygen Reduction Reaction, Platinum alloy catalyst, Nanoparticles, Gas Diffusion Electrode, Proton Exchange Membrane
National Category
Energy Systems Nano Technology Other Materials Engineering Other Chemical Engineering Condensed Matter Physics
Research subject
Materials Science; Solid State Physics
Identifiers
urn:nbn:se:umu:diva-158501 (URN)978-91-7855-044-9 (ISBN)
Public defence
2019-05-28, N460, Naturvetarhuset, Umeå, 10:15 (English)
Opponent
Supervisors
Available from: 2019-05-07 Created: 2019-04-29 Last updated: 2019-05-06Bibliographically approved

Open Access in DiVA

fulltext(2788 kB)51 downloads
File information
File name FULLTEXT01.pdfFile size 2788 kBChecksum SHA-512
8800b5ff9df348139c3799dc61fd0ea0c6b44d4928f6d3800b67e9ecaf5458cec4be51b1fc9c472d30cfe448199d8f2c6f730d5b90299b8260cb0340e88c0089
Type fulltextMimetype application/pdf

Other links

Publisher's full text

Authority records BETA

Sandström, RobinAnnamalai, AlagappanBoulanger, NicolasEkspong, JoakimTalyzin, AlexandrWågberg, Thomas

Search in DiVA

By author/editor
Sandström, RobinAnnamalai, AlagappanBoulanger, NicolasEkspong, JoakimTalyzin, AlexandrWågberg, Thomas
By organisation
Department of Physics
Nano TechnologyOther Chemical EngineeringOther Materials EngineeringEnergy Systems

Search outside of DiVA

GoogleGoogle Scholar
Total: 51 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 285 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf