Insights into properties of non-precious metal catalyst (NPMC)-based catalyst layer for proton exchange membrane fuel cells

2021 ◽  
Vol 496 ◽  
pp. 229817
Author(s):  
Shuiyun Shen ◽  
Junren Chen ◽  
Xiaohui Yan ◽  
Xiaojing Cheng ◽  
Lutian Zhao ◽  
...  
2017 ◽  
Vol 344 ◽  
pp. 39-45 ◽  
Author(s):  
Dustin Banham ◽  
Takeaki Kishimoto ◽  
Tetsutaro Sato ◽  
Yoshikazu Kobayashi ◽  
Kumi Narizuka ◽  
...  

Energies ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2975
Author(s):  
Zikhona Nondudule ◽  
Jessica Chamier ◽  
Mahabubur Chowdhury

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.


2021 ◽  
Vol 490 ◽  
pp. 229531
Author(s):  
Yurii V. Yakovlev ◽  
Yevheniia V. Lobko ◽  
Maryna Vorokhta ◽  
Jaroslava Nováková ◽  
Michal Mazur ◽  
...  

2019 ◽  
Vol 166 (7) ◽  
pp. F3089-F3092 ◽  
Author(s):  
Jonathan B. Grunewald ◽  
Aashutosh N. Mistry ◽  
Ankit Verma ◽  
Navneet Goswami ◽  
Partha P. Mukherjee ◽  
...  

2020 ◽  
Vol 4 (11) ◽  
pp. 5739-5746
Author(s):  
Panagiotis Trogadas ◽  
Jason I. S. Cho ◽  
Nidhi Kapil ◽  
Lara Rasha ◽  
Albert Corredera ◽  
...  

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


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