Work

Influence of the active area shape on the performance of an open-cathode proton exchange membrane fuel cell stack

Year: 2025

Type: article

Abstract: Two open-cathode proton exchange membrane fuel cell stacks with similar active area but different shape are developed to evaluate the influence of this parameter on their temperature and performance. A higher height (perpendicular to the air flow) and shorter length (parallel to the air flow) of the active area results in a more efficient heat removal leading to lower temperatures. This leads to an increase in the maximum current density and power output of the stack. With a 5.0 × 5.0 cm 2 stack, stable operation is achieved until 0.5 A cm −2 . An 8.5 × 3.0 cm 2 stack is stable until 0.8 A cm −2 . This effect is more noticeable for longer operation times. High frequency resistance tests reveal reduced ohmic resistances at lower temperatures, suggesting a better humidification of the stack membranes. The effect of the active area shape is also evaluated in the dynamic performance of the stacks.

Source: International Journal of Hydrogen Energy

DOI: 10.1016/j.ijhydene.2025.04.360

Authors: Diogo F.M. Santos, D.S. Falcão, A.M.F.R. Pinto, Rui B. Ferreira

Institutions: Universidade do Porto, Centro de Estudos de Fenómenos de Transporte

Language: English

Topic: Fuel Cells and Related Materials

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: hybrid

Estimated APC paid: $3,730