Abo Bibliothek: Guest

ISSN Online: 2377-424X

ISBN Print: 978-1-56700-474-8

ISBN Online: 978-1-56700-473-1

International Heat Transfer Conference 16
August, 10-15, 2018, Beijing, China

PARTICLE TRANSFER AND STRUCTURE FORMATION IN CATALYST INK DURING DRYING PROCESS

Get access (open in a dialog) DOI: 10.1615/IHTC16.mtr.024076
pages 5887-5892

Abstrakt

Numerical simulation of the drying process of colloidal dispersions was conducted. Catalyst layers of polymer electrolyte fuel cells are formed from a slurry called catalyst ink via applying and drying. Catalyst layers consist of platinum-loaded carbon and ionomer and they form a porous structure. Through-plane component distribution is an important factor for mass transfer and the resultant cell performance. Therefore, a model considering two solid components and variation of evaporation rate according to particle concentration on the drying surface was suggested to analyze dynamics and resultant through-plane distribution. The model showed that non-uniform distribution in the through-plane of the catalyst layers was formed during the catalyst ink drying at high Peclet number and low sedimentation number.