Composite Polymer Electrolyte Membrane Decorated with Porous Titanium Oxide Nanotubes for Fuel Cell Operating Under Low Relative Humidity

2021 ◽  
pp. 138407
Author(s):  
Sangaraju Shanmugam ◽  
Kriangsak Ketpang ◽  
Md. Abdul Aziz ◽  
Kwangjin Oh ◽  
Kibong Lee ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Relative Humidity ◽  
Titanium Oxide ◽  
Polymer Electrolyte Membrane ◽  
Porous Titanium ◽  
Composite Polymer Electrolyte ◽  
Composite Polymer ◽  
Electrolyte Membrane ◽  
Titanium Oxide Nanotubes ◽  
Porous Titanium Oxide

An Experimental Investigation of the Effects of the Environmental Conditions and the Channel Depth for an Air-Breathing Polymer Electrolyte Membrane Fuel Cell

2008 ◽  
Vol 5 (4) ◽  
Author(s):  
Yong Hun Park ◽  
Jerald A. Caton
Keyword(s):  
Fuel Cell ◽  
Relative Humidity ◽  
Flow Field ◽  
Current Density ◽  
Environmental Conditions ◽  
Polymer Electrolyte Membrane ◽  
Channel Depth ◽  
Air Breathing ◽  
Fuel Cell Performance ◽  
Electrolyte Membrane

The effects of the environmental conditions and the channel depth for an air-breathing polymer electrolyte membrane fuel cell were investigated experimentally. The fuel cell used in this work included a membrane and electrode assembly, which possessed an active area of 25 cm2 with Nafion® 117 membrane. Triple serpentine designs for the flow fields with two different flow depths were used in this research. The experimental results indicated that the relative humidity and temperature play an important role with respect to fuel cell performance. The fuel cell needs to be operated at least 20 min to obtain stable performance. When the shallow flow field was used, the performance increased dramatically for low humidity and slightly for high humidity. The current density was obtained around only 120 mA/cm2 at 30°C with an 80% relative humidity, which was nearly double the performance for the deep flow field. The minimum operating temperature for an air-breathing fuel cell would be 20°C. When it was 10°C at 60% relative humidity, the open circuit voltage dropped to around 0.65 V. The fuel cell performance improved with increasing relative humidity from 80% to 100% at high current density.

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