Synthesis and characterization of para- and meta-polybenzimidazoles for high-temperature proton exchange membrane fuel cells

2014 ◽  
Vol 26 (4) ◽  
pp. 436-444 ◽  
Author(s):  
Marek Malinowski ◽  
Agnieszka Iwan ◽  
Grzegorz Paściak ◽  
Kacper Parafiniuk ◽  
Lech Gorecki
Keyword(s):  
Fuel Cells ◽  
High Temperature ◽  
Proton Exchange Membrane ◽  
Proton Exchange ◽  
Synthesis And Characterization ◽  
Exchange Membrane

Synthesis and characterization of novel functionalized perarylated polysiloxane for proton exchange membrane fuel cells

MRS Advances ◽  
2019 ◽  
Vol 4 (64) ◽  
pp. 3579-3585
Author(s):  
Guillermo M. González Guerra ◽  
Alejandro Alatorre-Ordaz ◽  
Gerardo González Garcia ◽  
Jesus S. Jaime-Ferrer
Keyword(s):  
Cyclic Voltammetry ◽  
Fuel Cells ◽  
Proton Exchange Membrane ◽  
Area Under The Curve ◽  
Chlorosulfonic Acid ◽  
Proton Exchange ◽  
Synthesis And Characterization ◽  
A Value ◽  
Exchange Membrane

ABSTRACTThis work presents the synthesis and characterization of a pearylated polysiloxane material (PAP) from a polycondensation reaction, followed by functionalization with HClSO3 by an electrophilic substitution reaction. According to the characterization techniques applied, a sulfonated pearylated polysiloxane was also obtained, (SPAP). The purpose of this sulfonated material is to obtain an ionomer able to be applied in hydrogen fuel cells of the proton exchange membrane kind (PEMFC). The reaction to produce the polysiloxane precursor was carried out with the commercial reagents: PhSiCl3, Ph2SiCl2 and Ph3SiCl in anhydrous THF at 75 °C and the SPAP material was obtained by sulfonation of the precursor with chlorosulfonic acid. PAP and SPAP were characterized by 1H, NMR for liquids, 29Si NMR for solids, IR-ATR, SEM, and cyclic voltammetry. The NMR 29Si spectra show that PAP and PAPS contain crosslinking regions due to PhSiCl3, growing chain zones due to Ph2SiCl2 and polymer termination zones due to Ph3SiCl, obtaining a mixture of siloxanes. The analysis by cyclic voltammetry indicates that by integrating the area under the curve of the adsorption peaks of H2, a value of 0.062 mC/cm2 is obtained, a value close to the commercial ionomer of Nafion®.

Preparation of Novel Polyaniline and Phosphoric Acid Doped Sulfonated Polybenzimidazole Composite Membranes for Fuel Cells

2014 ◽  
Vol 584-586 ◽  
pp. 1669-1672
Author(s):  
Yong Ming Zhang ◽  
Jing Zou ◽  
Lei Wang ◽  
Han Chen ◽  
Jie Si
Keyword(s):  
High Temperature ◽  
Phosphoric Acid ◽  
Composite Membrane ◽  
Proton Exchange Membrane ◽  
Composite Membranes ◽  
Proton Exchange ◽  
Synthesis And Characterization ◽  
Sulfonated Polybenzimidazole ◽  
Exchange Membrane

Polyaniline (PANI) and phosphoric acid (PA) doped sulfonated polybenzimidazole (SPBI) composite membrane was prepared for application in high-temperature proton exchange membrane (PEMFC) without the need of humidification. The synthesis and characterization of targed composite membrane were introduced in this paper.

Synthesis and characterization of novel imidazolium-functionalized polyimides for high temperature proton exchange membrane fuel cells

RSC Advances ◽  
2016 ◽  
Vol 6 (40) ◽  
pp. 33959-33970 ◽  
Author(s):  
Jyh-Chien Chen ◽  
Jin-An Wu ◽  
Kuei-Hsien Chen
Keyword(s):  
High Temperature ◽  
Power Density ◽  
Peak Power ◽  
Proton Exchange Membrane ◽  
Microphase Separation ◽  
Proton Exchange ◽  
Synthesis And Characterization ◽  
High Peak Power ◽  
Exchange Membrane

PEMFCs based on novel imidazolium-functionalized polyimides (ImPI-x)s demonstrate high OCVs and high peak power density with low PA uptakes. Microphase separation of ImPI-x can also be observed by AFM.

Design and Experimental Characterization of a High-Temperature Proton Exchange Membrane Fuel Cell Stack

2011 ◽  
Vol 8 (5) ◽  
Author(s):  
Robert Radu ◽  
Nicola Zuliani ◽  
Rodolfo Taccani
Keyword(s):  
Fuel Cells ◽  
High Temperature ◽  
Fuel Cell ◽  
Proton Exchange Membrane ◽  
Single Cells ◽  
Pem Fuel Cells ◽  
Proton Exchange ◽  
Pure Hydrogen ◽  
Exchange Membrane

Proton exchange membrane (PEM) fuel cells based on polybenzimidazole (PBI) polymers and phosphoric acid can be operated at temperature between 120 °C and 180 °C. Reactant humidification is not required and CO content up to 1% in the fuel can be tolerated, only marginally affecting performance. This is what makes high-temperature PEM (HTPEM) fuel cells very attractive, as low quality reformed hydrogen can be used and water management problems are avoided. From an experimental point of view, the major research effort up to now was dedicated to the development and study of high-temperature membranes, especially to development of acid-doped PBI type membranes. Some studies were dedicated to the experimental analysis of single cells and only very few to the development and characterization of high-temperature stacks. This work aims to provide more experimental data regarding high-temperature fuel cell stacks, operated with hydrogen but also with different types of reformates. The main design features and the performance curves obtained with a three-cell air-cooled stack are presented. The stack was tested on a broad temperature range, between 120 and 180 °C, with pure hydrogen and gas mixtures containing up to 2% of CO, simulating the output of a typical methanol reformer. With pure hydrogen, at 180 °C, the considered stack is able to deliver electrical power of 31 W at 1.8 V. With a mixture containing 2% of carbon monoxide, in the same conditions, the performance drops to 24 W. The tests demonstrated that the performance loss caused by operation with reformates, can be partially compensated by a higher stack temperature.

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