Binaphthyl-based molecular barrier materials for phosphoric acid poisoning in high-temperature proton exchange membrane fuel cells

RSC Advances ◽  
2016 ◽  
Vol 6 (65) ◽  
pp. 60749-60755 ◽  
Author(s):  
Dong-Cheol Jeong ◽  
Bohyun Mun ◽  
Hyekyung Lee ◽  
Seung Jun Hwang ◽  
Sung Jong Yoo ◽  
...  
Keyword(s):  
Fuel Cells ◽  
High Temperature ◽  
Phosphoric Acid ◽  
Oxygen Reduction ◽  
Proton Exchange Membrane ◽  
Proton Exchange ◽  
Pt Catalysts ◽  
Oxygen Reduction Reactions ◽  
Barrier Materials ◽  
Exchange Membrane

In this study, thiol-functionalized binaphthyl barrier molecules were designed and synthesized for eliminating phosphoric acid (PA)-poisoning on Pt catalysts in oxygen reduction reactions (ORRs).

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

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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