Scalable sacrificial templating to increase porosity and platinum utilisation in graphene-based polymer electrolyte fuel cell electrodes - Archive ouverte HAL Access content directly
Journal Articles Nanomaterials Year : 2021

Scalable sacrificial templating to increase porosity and platinum utilisation in graphene-based polymer electrolyte fuel cell electrodes

(1) , (1) , (2) , (3) , (4) , (1) , (2) , (4) , (1) , (2) , (1) , (1)
1
2
3
4

Abstract

Polymer electrolyte fuel cells hold great promise for a range of applications but require advances in durability for widespread commercial uptake. Corrosion of the catalyst carbon support is one of the main degradation pathways; hence, corrosion-resilient graphene has been widely suggested as an alternative to traditional carbon black. However, the performance of bulk graphene-based electrodes is typically lower than commercial carbon black due to stacking effects. This work reports a simple, scalable and non-destructive method by which the porosity and platinum utilisation of graphene-based membrane electrode assemblies can be significantly improved. Urea is incorporated into the catalyst ink before deposition, and is then simply removed from the catalyst layer after spraying by submerging the electrode in water. This additive hinders graphene restacking and increases porosity, resulting in a significant increase in Pt utilisation and current density. This technique does not require harsh template etching and it represents a pathway to significantly improve graphene-based electrodes by introducing hierarchical porosity using scalable liquid processes.
Fichier principal
Vignette du fichier
2021 nanomaterials-graphene.pdf (2.85 Mo) Télécharger le fichier
Origin : Files produced by the author(s)

Dates and versions

cea-03623329 , version 1 (29-03-2022)

Licence

Attribution - CC BY 4.0

Identifiers

Cite

Theo A.M. Suter, Adam J. Clancy, Noellia Rubio Carrero, Marie Heitzmann, Laure Guetaz, et al.. Scalable sacrificial templating to increase porosity and platinum utilisation in graphene-based polymer electrolyte fuel cell electrodes. Nanomaterials, 2021, 11, pp.2530. ⟨10.3390/nano11102530⟩. ⟨cea-03623329⟩
9 View
17 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More