Designing an ultrathin silica layer for highly durable carbon nanofibers as the carbon support in polymer electrolyte fuel cells

Nanoscale ◽  
2014 ◽  
Vol 6 (20) ◽  
pp. 12111-12119 ◽  
Author(s):  
Sun-Mi Hwang ◽  
Jae-Hyun Park ◽  
Seongyop Lim ◽  
Doo-Hwan Jung ◽  
Hwanuk Guim ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Fuel Cells ◽  
Polymer Electrolyte ◽  
Carbon Nanofibers ◽  
Carbon Support ◽  
Polymer Electrolyte Fuel Cells ◽  
Silica Layer ◽  
Hydrophobic Silica

The partially coated, ultrathin, hydrophobic silica layer around CNF helps improve the durability without decreasing the electrical conductivity of virgin CNF.

Expanded Graphite/Epoxy/Aliphatic Amine Composites for Bipolar Plates Applications in Polymer Electrolyte Fuel Cells

2019 ◽  
Vol 821 ◽  
pp. 426-432 ◽  
Author(s):  
Andres F. Rigail-Cedeño ◽  
Mayken Espinoza-Andaluz ◽  
Jorge Medina-Andrade ◽  
Karol Leal-Zavala
Keyword(s):  
Electrical Conductivity ◽  
Fuel Cells ◽  
Polymer Electrolyte ◽  
Aliphatic Amine ◽  
Synergistic Effects ◽  
Expanded Graphite ◽  
Diglycidyl Ether ◽  
Polymer Electrolyte Fuel Cells ◽  
Graphite Nanoplatelets ◽  
Bipolar Plates

Suitable conductive fillers for resins and processing conditions are critical factors for the final properties of composite bipolar plates. This research is focused on the development of expanded graphite/epoxy/aliphatic amine composite as a potential replacement for conventional bipolar plates to meet global standards of Polymer Electrolyte Fuel Cells (PEFCs). The synergistic effects on the electrical conductivity of secondary fillers Carbon Black (CB) and Graphite nanoplatelets (GNP) with Expanded Graphite (EG) were studied in a diglycidyl ether of bisphenol A (DGEBA) epoxy/polyether triamine system. Compositions of secondary filler were varied in proportions of 5, 10, 15 and 20 wt % in a fixed 40 wt % EG / Epoxy resin (w/w) to find the right secondary fillers under direct mixing without solvent. A 10 wt % CB displayed the highest electrical conductivity around 3.05 QUOTE x10-2 S/cm. For a 60 wt % EG/10 wt % CB composite, the electrical conductivity (in plane) and flexural strength were at about 19 S/cm and 22 MPa, respectively.

scholarly journals Effects of Microstructure of Carbon Support in the Catalyst Layer on the Performance of Polymer‐Electrolyte Fuel Cells

1996 ◽  
Vol 143 (7) ◽  
pp. 2245-2252 ◽  
Author(s):  
Makoto Uchida ◽  
Yuko Fukuoka ◽  
Yasushi Sugawara ◽  
Nobuo Eda ◽  
Akira Ohta
Keyword(s):  
Fuel Cells ◽  
Polymer Electrolyte ◽  
Catalyst Layer ◽  
Carbon Support ◽  
Polymer Electrolyte Fuel Cells

TiO2-nanowire/MWCNT composite with enhanced performance and durability for polymer electrolyte fuel cells

2017 ◽  
Vol 3 (1) ◽  
Author(s):  
S. Vinod Selvaganesh ◽  
P. Dhanasekaran ◽  
Santoshkumar D. Bhat
Keyword(s):  
Fuel Cells ◽  
Polymer Electrolyte ◽  
Hybrid Composite ◽  
Carbon Support ◽  
Polymer Electrolyte Fuel Cells ◽  
Cell Performance ◽  
Pt Catalyst ◽  
Composite Support ◽  
Tio2 Nanowire ◽  
Key Parameter

AbstractDurability is a major issue and has been the growing focus of research for the commercialization of polymer electrolyte fuel cells (PEFCs). Corrosion of carbon support is a key parameter as it triggers the Pt catalyst degradation and affects cell performance, which in turn affects the longevity of the cells. Herein, we describe a hybrid composite support of TiO

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