scholarly journals Impact of Microporous Layer on Heat and Mass Transfer in a Single Cell of Polymer Electrolyte Fuel Cell Using a Thin Polymer Electrolyte Membrane and a Thin Gas Diffusion Layer Operated at a High-Temperature Range

ACS Omega ◽  
2021 ◽  
Author(s):  
Akira Nishimura ◽  
Tatsuya Okado ◽  
Yuya Kojima ◽  
Eric Hu
Keyword(s):  
Mass Transfer ◽  
High Temperature ◽  
Fuel Cell ◽  
Polymer Electrolyte ◽  
Polymer Electrolyte Membrane ◽  
Gas Diffusion ◽  
Polymer Electrolyte Fuel Cell ◽  
Microporous Layer ◽  
Electrolyte Membrane ◽  
Thin Polymer

scholarly journals Impact of Microporous Layer Roughness on Gas-Diffusion-Electrode-Based Polymer Electrolyte Membrane Fuel Cell Performance

2019 ◽  
Vol 2 (11) ◽  
pp. 7757-7761 ◽  
Author(s):  
Min Wang ◽  
Samantha Medina ◽  
Jason R. Pfeilsticker ◽  
Svitlana Pylypenko ◽  
Michael Ulsh ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Polymer Electrolyte ◽  
Polymer Electrolyte Membrane ◽  
Gas Diffusion ◽  
Gas Diffusion Electrode ◽  
Cell Performance ◽  
Microporous Layer ◽  
Fuel Cell Performance ◽  
Electrolyte Membrane

scholarly journals New Carbon Nanofiber Composite Materials Containing Lanthanides and Transition Metals Based on Electrospun Polyacrylonitrile for High Temperature Polymer Electrolyte Membrane Fuel Cell Cathodes

Polymers ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 1340 ◽  
Author(s):  
Igor I. Ponomarev ◽  
Kirill M. Skupov ◽  
Olga M. Zhigalina ◽  
Alexander V. Naumkin ◽  
Alexander D. Modestov ◽  
...  
Keyword(s):  
High Temperature ◽  
Fuel Cell ◽  
Polymer Electrolyte ◽  
Photoelectron Spectroscopy ◽  
Carbon Nanofiber ◽  
Polymer Electrolyte Membrane ◽  
Composite Cathode ◽  
Gas Diffusion ◽  
Electrolyte Membrane ◽  
Nanofiber Mats

Electrospinning of polyacrylonitrile/DMF dopes containing salts of nickel, cobalt, zirconium, cerium, gadolinium, and samarium, makes it possible to obtain precursor nanofiber mats which can be subsequently converted into carbon nanofiber (CNF) composites by pyrolysis at 1000–1200 °C. Inorganic additives were found to be uniformly distributed in CNFs. Metal states were investigated by transmission electron microscopy and X-ray photoelectron spectroscopy (XPS). According to XPS in CNF/Zr/Ni/Gd composites pyrolyzed at 1000 °C, nickel exists as Ni0 and as Ni2+, gadolinium as Gd3+, and zirconium as Zr4+. If CNF/Zr/Ni/Gd is pyrolyzed at 1200 °C, nickel exists only as Ni0. For CNF/Sm/Co composite, samarium is in Sm3+ form when cobalt is not found on a surface. For CNF/Zr/Ni/Ce composite, cerium exists both as Ce4+ and as Ce3+. Composite CNF mats were platinized and tested as cathodes in high-temperature polymer electrolyte membrane fuel cell (HT-PEMFC). Such approach allows to introduce Pt–M and Pt–MOx into CNF, which are more durable compared to carbon black under HT-PEMFC operation. For CNF/Zr/Ni/Gd composite cathode, higher performance in the HT-PEMFC at I >1.2 A cm-2 is achieved due to elimination of mass transfer losses in gas-diffusion electrode compared to commercial Celtec®P1000.

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