Nano-scale control of the ionomer distribution by molecular masking of the Pt surface in PEMFCs

2020 ◽  
Vol 8 (26) ◽  
pp. 13004-13013 ◽  
Author(s):  
Gisu Doo ◽  
Seongmin Yuk ◽  
Ji Hye Lee ◽  
Sungyu Choi ◽  
Dong-Hyun Lee ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Polymer Electrolyte ◽  
Polymer Electrolyte Membrane ◽  
Catalyst Layer ◽  
Pt Catalyst ◽  
Phase Boundaries ◽  
Electrolyte Membrane ◽  
Three Phase ◽  
New Strategy ◽  
Scale Control

A new strategy for controlling the ionomer distribution in the catalyst layer of a polymer electrolyte membrane fuel cell, the molecular masking of Pt catalyst particles, is presented to achieve efficient three phase boundaries for the ORR.

scholarly journals Nonisothermal two‐phase modeling of the effect of linear nonuniform catalyst layer on polymer electrolyte membrane fuel cell performance

2020 ◽  
Vol 8 (10) ◽  
pp. 3575-3587
Author(s):  
Seyedali Sabzpoushan ◽  
Hassan Jafari Mosleh ◽  
Soheil Kavian ◽  
Mohsen Saffari Pour ◽  
Omid Mohammadi ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Polymer Electrolyte ◽  
Polymer Electrolyte Membrane ◽  
Catalyst Layer ◽  
Cell Performance ◽  
Two Phase ◽  
Fuel Cell Performance ◽  
Electrolyte Membrane

The Effect of Ionomer Thin Films in Ionomer- and Water-Filled Agglomerate Models

2011 ◽  
Author(s):  
Peter Dobson ◽  
Marc Secanell
Keyword(s):  
Thin Film ◽  
Fuel Cell ◽  
Polymer Electrolyte ◽  
Numerical Models ◽  
Polymer Electrolyte Membrane ◽  
Catalyst Support ◽  
Catalyst Layer ◽  
Polymer Electrolyte Fuel Cell ◽  
Electrolyte Membrane ◽  
Perfluorosulfonated Ionomer

The catalyst layer of a polymer electrolyte fuel cell is commonly represented in mathematical models as an agglomerate structure of carbon catalyst-support particles. There are two prevailing assumptions for the structure of the agglomerates. The first is that the pores are filled with perfluorosulfonated-ionomer (PFSI). The second is that the pores are hydrophilic and are flooded only with liquid water during operation. The objective of this work is to develop numerical models for single water-filled and ionomer-filled agglomerates in a cathode catalyst layer of a polymer electrolyte membrane fuel cell (PEMFC), and investigate the properties of oxygen transport, proton transport, and reaction kinetics. The two models provide different solutions for the distribution of oxygen and protons, and produce a different reaction profile within the agglomerate. Previous numerical water-filled ionomer models in the literature have neglected the effect of the ionomer thin film. Therefore, the results obtained for both ionomer and water-filled models could not be easily compared. In this article, the equations developed relate the assumed structure of the agglomerates to the structure of the catalyst layer (CL). Results compare the effect of the thin film thickness in the two different types of agglomerates and relate the phenomena occurring within the agglomerates to overall catalyst layer performance.

Partially Perfluorinated Hydrocarbon Ionomer for Cathode Catalyst Layer of Polymer Electrolyte Membrane Fuel Cell

2014 ◽  
Vol 125 ◽  
pp. 314-319 ◽  
Author(s):  
Keun-Hwan Oh ◽  
Wan-Keun Kim ◽  
Min-Ju Choo ◽  
Jae-Suk Lee ◽  
Jung-Ki Park ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Polymer Electrolyte ◽  
Polymer Electrolyte Membrane ◽  
Catalyst Layer ◽  
Cathode Catalyst ◽  
Electrolyte Membrane ◽  
Cathode Catalyst Layer
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