scholarly journals Impact of Membrane Phosphoric Acid Doping Level on Transport Phenomena and Performance in High Temperature PEM Fuel Cells

Membranes ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 817
Author(s):  
Shian Li ◽  
Chengdong Peng ◽  
Qiuwan Shen ◽  
Chongyang Wang ◽  
Yuanzhe Cheng ◽  
...  
Keyword(s):  
Fuel Cells ◽  
High Temperature ◽  
Phosphoric Acid ◽  
Doping Level ◽  
Mass Fraction ◽  
Proton Exchange Membrane ◽  
Transport Phenomena ◽  
Pem Fuel Cells ◽  
Proton Exchange ◽  
And Performance

In this work, a three-dimensional mathematical model including the fluid flow, heat transfer, mass transfer, and charge transfer incorporating electrochemical reactions was developed and applied to investigate the transport phenomena and performance in high-temperature proton exchange membrane fuel cells (HT-PEMFCs) with a membrane phosphoric acid doping level of 5, 7, 9, 11. The cell performance is evaluated and compared in terms of the polarization curve. The distributions of temperature, oxygen mass fraction, water mass fraction, proton conductivity, and local current density of four cases are given and compared in detail. Results show that the overall performance and local transport characteristics are significantly affected by the membrane phosphoric acid doping level.

Phosphoric acid doped imidazolium polysulfone membranes for high temperature proton exchange membrane fuel cells

2012 ◽  
Vol 205 ◽  
pp. 114-121 ◽  
Author(s):  
Jingshuai Yang ◽  
Qingfeng Li ◽  
Jens Oluf Jensen ◽  
Chao Pan ◽  
Lars N. Cleemann ◽  
...  
Keyword(s):  
Fuel Cells ◽  
High Temperature ◽  
Phosphoric Acid ◽  
Proton Exchange Membrane ◽  
Proton Exchange ◽  
Exchange Membrane ◽  
Polysulfone Membranes

MODELING OF PEM FUEL CELLS WITH FINITE-THICKNESS CATALYSTS

2009 ◽  
Vol 23 (03) ◽  
pp. 537-540 ◽  
Author(s):  
JIANG HUI YIN ◽  
JUN CAO
Keyword(s):  
Fuel Cells ◽  
Fuel Cell ◽  
Performance Optimization ◽  
Proton Exchange Membrane ◽  
Cell Model ◽  
Finite Thickness ◽  
Pem Fuel Cells ◽  
Proton Exchange ◽  
And Performance ◽  
Exchange Membrane

A general proton exchange membrane fuel cell model including two finite-thickness catalysts is developed in this study, allowing for an in-depth understanding of the effects of the two key electrochemical reactions taking place in the two catalysts. The model is used to predict the performances of fuel cells employing two different flow channel designs, providing insights for fuel cell design and performance optimization.

scholarly journals 3D Network Structural Poly (Aryl Ether Ketone)-Polybenzimidazole Polymer for High-Temperature Proton Exchange Membrane Fuel Cells

2020 ◽  
Vol 2020 ◽  
pp. 1-13
Author(s):  
Junqiao Jiang ◽  
Erli Qu ◽  
Min Xiao ◽  
Dongmei Han ◽  
Shuanjin Wang ◽  
...  
Keyword(s):  
Fuel Cells ◽  
High Temperature ◽  
Phosphoric Acid ◽  
Proton Exchange Membrane ◽  
Proton Exchange ◽  
Aryl Ether ◽  
3D Network ◽  
Aryl Ether Ketone ◽  
Ether Ketone ◽  
Exchange Membrane

Poor mechanical property is a critical problem for phosphoric acid-doped high-temperature proton exchange membranes (HT-PEMs). In order to address this concern, in this work, a 3D network structural poly (aryl ether ketone)-polybenzimidazole (PAEK-cr-PBI) polymer electrolyte membrane was successfully synthesized through crosslinking reaction between poly (aryl ether ketone) with the pendant carboxyl group (PAEK-COOH) and amino-terminated polybenzimidazole (PBI-4NH2). PAEK-COOH with a poly (aryl ether ketone) backbone endows superior thermal, mechanical, and chemical stability, while PBI-4NH2 serves as both a proton conductor and a crosslinker with basic imidazole groups to absorb phosphoric acid. Moreover, the composite membrane of PAEK-cr-PBI blended with linear PBI (PAEK-cr-PBI@PBI) was also prepared. Both membranes with a proper phosphoric acid (PA) uptake exhibit an excellent proton conductivity of around 50 mS cm-1 at 170°C, which is comparable to that of the well-documented PA-doped PBI membrane. Furthermore, the PA-doped PAEK-cr-PBI membrane shows superior mechanical properties of 17 MPa compared with common PA-doped PBI. Based upon these encouraging results, the as-synthesized PAEK-cr-PBI gives a highly practical promise for its application in high-temperature proton exchange membrane fuel cells (HT-PEMFCs).

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