dc.contributor.author | Peach, Retha | |
dc.contributor.author | Krieg, Henning M. | |
dc.contributor.author | Krüger, Andries J. | |
dc.contributor.author | Bessarabov, Dmitri | |
dc.contributor.author | Kerres, Jochen | |
dc.date.accessioned | 2018-10-17T11:16:09Z | |
dc.date.available | 2018-10-17T11:16:09Z | |
dc.date.issued | 2018 | |
dc.identifier.citation | Peach, R. et al. 2018. Novel cross-linked PBI-blended membranes evaluated for high temperature fuel cell application and SO2 electrolysis. 1st Africa Energy Materials Conference, 28-31 March 2017. Materials today: proceedings, 5(4, Pt 2):105224-10532. [https://doi.org/10.1016/j.matpr.2017.12.384] | en_US |
dc.identifier.issn | 2214-7853 | |
dc.identifier.uri | http://hdl.handle.net/10394/31447 | |
dc.identifier.uri | https://doi.org/10.1016/j.matpr.2017.12.384 | |
dc.identifier.uri | https://www.sciencedirect.com/science/article/pii/S2214785317333904 | |
dc.description.abstract | Within this study various partially fluorinated polyaromatic and PBI blend components were covalent-ionically cross-linked to obtain acid and base-excess proton exchange membranes that can be applied in high temperature fuel cells and SO2 electrolysis. A stability assessment of the blend membranes included an extraction experiment in the organic solvent N,N-dimethylacetamide (DMAc), Fenton’s Test (FT) and an 80 wt% H2SO4 treatment for 120 hours at 100 °C. Furthermore the thermal stability of the materials were evaluated by TGA-FTIR coupling, and the H+-conductivity determined for the phosphoric acid-doped (PA) membranes in temperature ranges 60-140 °C. It was found that all blend membranes showed good chemical stability during the H2SO4 treatment; though the base-excess blend membranes reported better chemical stabilities in the FT and DMAc extraction experiments in comparison to the acid-excess blends. The earliest thermal degradation for a blend membrane was found to start at 277 °C, only after the H2SO4 treatment, supporting the thermal stability. For the PA-doped blend membranes conductivities of 39,6 mS/cm reported at 140 °C was comparable to earlier work on similar membrane blends, but now achieved at a lower PA-doping level. Furthermore the base-excess membrane selected for fuel cell (FC) testing reported comparable in the polarization curves recorded at 140 ⁰C, however a maximum power density of 88.2 mW/cm2 was reached in comparison to the 72.8 mW/cm2 of Celtec®-P under the same operation conditions for similarly prepared MEAs. This all proves promising for further testing and optimization of the blend membranes for HTFC and SO2 electrolysis applications | en_US |
dc.language.iso | en | en_US |
dc.publisher | Elsevier | en_US |
dc.subject | Covalent-ionically cross-linked | en_US |
dc.subject | PBI-blend membranes | en_US |
dc.subject | High temperature suitability | en_US |
dc.subject | Acid-excess | en_US |
dc.subject | Base-excess | en_US |
dc.subject | FC application | en_US |
dc.title | Novel cross-linked PBI-blended membranes evaluated for high temperature fuel cell application and SO2 electrolysis | en_US |
dc.type | Presentation | en_US |
dc.contributor.researchID | 21640904 - Peach, Retha | |
dc.contributor.researchID | 11087137 - Krieg, Henning Manfred | |
dc.contributor.researchID | 13061631 - Krüger, Andries Johannes | |
dc.contributor.researchID | 22730389 - Bessarabov, Dmitri Georgievich | |