Less-Nafion electrodes based on PSSA-Pt/Vulcan catalyst for PEM fuel cells

Xia, Yuzhen; Bonnet, Caroline; Fontana, Sébastien; Desforges, Alexandre; Maranzana, Gaël; Lapicque, François

doi:10.1016/j.jelechem.2016.01.024

Cited by 2 publications

(1 citation statement)

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“…Platinum utilization plays an important role in commercialization of fuel cells; as despite of the accomplished efforts to replace platinum, this rare and precious metal still is the main choice to catalyze the PEMFC electrode reactions, especially oxygen reduction reaction. To increase the void volume of catalyst layer, some researchers have tried to use functionalized carbon supports with proton conductive groups, such as sulfonated polymers and reduce the required Nafion ionomer ; but this approach is not a mature method and use of Nafion ionomer leads to higher performance at this time. Catalyst layer void volume, regardless of the short‐term effect on the performance of the fuel cell, can also be effective on the long term performance sustainability.…”

Section: Introductionmentioning

confidence: 99%

Influence of the Cathode Catalyst Layer Void Volume on the Short‐term and Long‐term Performance of PEM Fuel Cell

2018

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The cathode catalyst layer void volume of the proton exchange membrane fuel cell (PEMFC) determines the available three‐phase regions and routes of mass transfer in the membrane electrode assembly (MEA). In this paper, four MEAs with different void volume of cathode catalyst layer have been made and their performance was evaluated and analyzed. The results show that for the MEA with cathode catalyst layer porosity of 20.8%, an optimal structure and a proper balance between catalyst layer void volume and Nafion content is obtained. The optimal void volume caused that electrochemical surface area for the MEA with the optimal structure be 1.45 times higher than MEA having a porosity of 29.5% at the end of the long‐term cycles. On the other hand, the mass transfer resistance (Rmt) at the end of long‐term cycles for MEA with the optimal structure is 4.8 times less than the same MEA having a porosity of 15.9%. This fact makes that MEA with the cathode catalyst layer porosity of 20.8%, both in short and in the long‐term, has higher and more stable performance than other MEAs; so that its maximum output power density has changed only 0.8% during 200 cycles.

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Section: Introductionmentioning

confidence: 99%