Effect of Dispersion Solvents and Ionomers on the Rheology of Catalyst Inks and Catalyst Layer Structure for Proton Exchange Membrane Fuel Cells

2021 ◽  
Author(s):  
Yuqing Guo ◽  
Daozeng Yang ◽  
Bing Li ◽  
Daijun Yang ◽  
Pingwen Ming ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Proton Exchange Membrane ◽  
Layer Structure ◽  
Catalyst Layer ◽  
Proton Exchange ◽  
Exchange Membrane

scholarly journals Effect of Stratification of Cathode Catalyst Layers on Durability of Proton Exchange Membrane Fuel Cells

Energies ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2975
Author(s):  
Zikhona Nondudule ◽  
Jessica Chamier ◽  
Mahabubur Chowdhury
Keyword(s):  
Fuel Cells ◽  
Proton Exchange Membrane ◽  
Electrochemical Impedance ◽  
Catalyst Layer ◽  
Cost Effective ◽  
Proton Exchange ◽  
Membrane Electrode ◽  
Potential Cycling ◽  
Catalyst Layers ◽  
Exchange Membrane

To decrease the cost of fuel cell manufacturing, the amount of platinum (Pt) in the catalyst layer needs to be reduced. In this study, ionomer gradient membrane electrode assemblies (MEAs) were designed to reduce Pt loading without sacrificing performance and lifetime. A two-layer stratification of the cathode was achieved with varying ratios of 28 wt. % ionomer in the inner layer, on the membrane, and 24 wt. % on the outer layer, coated onto the inner layer. To study the MEA performance, the electrochemical surface area (ECSA), polarization curves, and electrochemical impedance spectroscopy (EIS) responses were evaluated under 20, 60, and 100% relative humidity (RH). The stratified MEA Pt loading was reduced by 12% while maintaining commercial equivalent performance. The optimal two-layer design was achieved when the Pt loading ratio between the layers was 1:6 (inner:outer layer). This MEA showed the highest ECSA and performance at 0.65 V with reduced mass transport losses. The integrity of stratified MEAs with lower Pt loading was evaluated with potential cycling and proved more durable than the monolayer MEA equivalent. The higher ionomer loading adjacent to the membrane and the bi-layer interface of the stratified catalyst layer (CL) increased moisture in the cathode CL, decreasing the degradation rate. Using ionomer stratification to decrease the Pt loading in an MEA yielded a better performance compared to the monolayer MEA design. This study, therefore, contributes to the development of more durable, cost-effective MEAs for low-temperature proton exchange membrane fuel cells.

Ionomer content effect on charge and gas transport in the cathode catalyst layer of proton-exchange membrane fuel cells

2021 ◽  
Vol 490 ◽  
pp. 229531
Author(s):  
Yurii V. Yakovlev ◽  
Yevheniia V. Lobko ◽  
Maryna Vorokhta ◽  
Jaroslava Nováková ◽  
Michal Mazur ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Proton Exchange Membrane ◽  
Gas Transport ◽  
Catalyst Layer ◽  
Proton Exchange ◽  
Cathode Catalyst ◽  
Cathode Catalyst Layer ◽  
Exchange Membrane

Perspective—Mesoscale Physics in the Catalyst Layer of Proton Exchange Membrane Fuel Cells

2019 ◽  
Vol 166 (7) ◽  
pp. F3089-F3092 ◽  
Author(s):  
Jonathan B. Grunewald ◽  
Aashutosh N. Mistry ◽  
Ankit Verma ◽  
Navneet Goswami ◽  
Partha P. Mukherjee ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Proton Exchange Membrane ◽  
Catalyst Layer ◽  
Proton Exchange ◽  
Exchange Membrane

scholarly journals Effect of extended short-circuiting in proton exchange membrane fuel cells

2020 ◽  
Vol 4 (11) ◽  
pp. 5739-5746
Author(s):  
Panagiotis Trogadas ◽  
Jason I. S. Cho ◽  
Nidhi Kapil ◽  
Lara Rasha ◽  
Albert Corredera ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Proton Exchange Membrane ◽  
Detrimental Effect ◽  
Catalyst Layer ◽  
Proton Exchange ◽  
And Performance ◽  
Exchange Membrane

The detrimental effect of extended short-circuiting in the degradation of catalyst layer and performance of proton exchange membrane fuel cells.

A novel catalyst layer with carbon matrix for Pt nanowire growth in proton exchange membrane fuel cells (PEMFCs)

2013 ◽  
Vol 38 (28) ◽  
pp. 12374-12378 ◽  
Author(s):  
Xianyong Yao ◽  
Kaihua Su ◽  
Sheng Sui ◽  
Liwei Mao ◽  
An He ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Proton Exchange Membrane ◽  
Catalyst Layer ◽  
Carbon Matrix ◽  
Proton Exchange ◽  
Nanowire Growth ◽  
Novel Catalyst ◽  
Exchange Membrane

Degradation analyses of Ru85Se15 catalyst layer in proton exchange membrane fuel cells

2012 ◽  
Vol 218 ◽  
pp. 79-87 ◽  
Author(s):  
Qiaoming Zheng ◽  
Xuan Cheng ◽  
Ting-Chu Jao ◽  
Fang-Bor Weng ◽  
Ay Su ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Proton Exchange Membrane ◽  
Catalyst Layer ◽  
Proton Exchange ◽  
Exchange Membrane
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