scholarly journals Probing of complex carbon nanofiber paper as gas-diffusion electrode for high temperature polymer electrolyte membrane fuel cell

RSC Advances ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 257-267 ◽  
Author(s):  
Igor I. Ponomarev ◽  
Kirill M. Skupov ◽  
Alexander V. Naumkin ◽  
Victoria G. Basu ◽  
Olga M. Zhigalina ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Carbon Nanofiber ◽  
Polymer Electrolyte Membrane ◽  
Gas Diffusion ◽  
Electrolyte Membrane ◽  
Fuel Cell Electrode ◽  
Commercial Carbon ◽  
Complex Carbon ◽  
Cell Electrode ◽  
Composite Carbon

Complex composite carbon nanofiber fuel cell electrode shows advantages compared to non-composite and less durable commercial carbon black ones.

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.

Optimized Polymer Electrolyte Membrane Fuel Cell Electrode Using TiO2 Nanotube Arrays with Well-Defined Spacing

2020 ◽  
Vol 3 (5) ◽  
pp. 4157-4170
Author(s):  
Selda Ozkan ◽  
Francesco Valle ◽  
Anca Mazare ◽  
Imgon Hwang ◽  
Nicola Taccardi ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Polymer Electrolyte ◽  
Polymer Electrolyte Membrane ◽  
Tio2 Nanotube Arrays ◽  
Tio2 Nanotube ◽  
Nanotube Arrays ◽  
Electrolyte Membrane ◽  
Fuel Cell Electrode ◽  
Cell Electrode
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