Paradox phenomena of proton exchange membrane fuel cells operating under dead-end anode mode

In situ analysis of voltage degradation in a polymer electrolyte membrane fuel cell with a dead-ended anode

“…This indicates that the anode and cathode may have experienced voltage degradations due to reactant starvation. These observations are in line with recent studies [4,12] where the performance degradation in the cathode was reported during DEA operation.…”

“…Siegel et al [4] and Lee et al [3] visualized the liquid water in anode channels using neutron imaging and a transparent fuel cell, respectively. More recently, it was reported that the overpotentials of both the anode and cathode concomitantly increased or decreased at the same time during DEA operation [12], and that the relative humidity of the cathode plays a significant role in fuel cell voltage degradation rates [3,4]. Therefore, understanding water transport in both anode and cathode is critical for determining the impact of DEA operation on the global water management of the fuel cell.…”

Performance improvement of the open-cathode proton exchange membrane fuel cell by optimizing membrane electrode assemblies

“…The change of R hf with cell temperature gives more information. There was a concomitant increase in R hf with the loss in cell voltage, which significantly suggests a relationship with the change in water content [46]. The R hf at 800 mA cm À2 was smaller than that at 400 mA cm À2 , which is a further proof to demonstrate that the changes at high temperatures are strongly affected by the humidity.…”

Investigation of Microstructure and Pt Distribution in Catalyst Layer after Accelerated Degradation Test in PEMFC

“…Ferreira-Aparicio and Chaparro (2) studied the effect of the thickness of CL on the performance of the MEA. We suggested that water may accumulate at the interface between the surface of the catalyst and the ultrathin ionomer film by the H 2 depletion tests for dead-end anode fuel cells (3). Ge (4) observed liquid water breakthrough event.…”