scholarly journals Novel, low-cost separator plates and flow-field elements for use in PEM fuel cells

1996 ◽  
Author(s):  
D J Edlund
Keyword(s):  
Fuel Cells ◽  
Flow Field ◽  
Low Cost ◽  
Pem Fuel Cells

Analytical and numerical study on cooling flow field designs performance of PEM fuel cell with variable heat flux

2016 ◽  
Vol 30 (16) ◽  
pp. 1650155 ◽  
Author(s):  
Ebrahim Afshari ◽  
Masoud Ziaei-Rad ◽  
Nabi Jahantigh
Keyword(s):  
Heat Flux ◽  
Fuel Cells ◽  
Fuel Cell ◽  
Pressure Drop ◽  
Flow Field ◽  
Pem Fuel Cells ◽  
Coolant Flow ◽  
Temperature Uniformity ◽  
Variable Heat ◽  
Variable Heat Flux

In PEM fuel cells, during electrochemical generation of electricity more than half of the chemical energy of hydrogen is converted to heat. This heat of reactions, if not exhausted properly, would impair the performance and durability of the cell. In general, large scale PEM fuel cells are cooled by liquid water that circulates through coolant flow channels formed in bipolar plates or in dedicated cooling plates. In this paper, a numerical method has been presented to study cooling and temperature distribution of a polymer membrane fuel cell stack. The heat flux on the cooling plate is variable. A three-dimensional model of fluid flow and heat transfer in cooling plates with 15 cm × 15 cm square area is considered and the performances of four different coolant flow field designs, parallel field and serpentine fields are compared in terms of maximum surface temperature, temperature uniformity and pressure drop characteristics. By comparing the results in two cases, the constant and variable heat flux, it is observed that applying constant heat flux instead of variable heat flux which is actually occurring in the fuel cells is not an accurate assumption. The numerical results indicated that the straight flow field model has temperature uniformity index and almost the same temperature difference with the serpentine models, while its pressure drop is less than all of the serpentine models. Another important advantage of this model is the much easier design and building than the spiral models.

Flow-Field Designs of Bipolar Plates in PEM Fuel Cells: Theory and Applications

Fuel Cells ◽  
2012 ◽  
Vol 12 (6) ◽  
pp. 989-1003 ◽  
Author(s):  
J. Wang ◽  
H. Wang
Keyword(s):  
Fuel Cells ◽  
Flow Field ◽  
Pem Fuel Cells ◽  
Bipolar Plates

The effects of flow-field orientation on water management in PEM fuel cells with serpentine channels

2017 ◽  
Vol 208 ◽  
pp. 1083-1096 ◽  
Author(s):  
Moosa Ashrafi ◽  
Mehrzad Shams
Keyword(s):  
Water Management ◽  
Fuel Cells ◽  
Flow Field ◽  
Pem Fuel Cells ◽  
Field Orientation

Performance of unit PEM fuel cells with a leaf-vein-simulating flow field-patterned bipolar plate

2019 ◽  
Vol 44 (43) ◽  
pp. 24036-24042 ◽  
Author(s):  
Hie Chan Kang ◽  
Kyung Min Jum ◽  
Young Jun Sohn
Keyword(s):  
Fuel Cells ◽  
Flow Field ◽  
Bipolar Plate ◽  
Pem Fuel Cells ◽  
Leaf Vein

Performance of Parallel, Interdigitated, and Serpentine Flow Field PEM Fuel Cells with Straight or Wavelike Channels

2020 ◽  
Vol 146 (5) ◽  
pp. 04020054 ◽  
Author(s):  
Quan Ding ◽  
Hong-Liang Zhao ◽  
Zhong-Min Wan ◽  
Yan-Ru Yang ◽  
Chen Yang ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Flow Field ◽  
Pem Fuel Cells ◽  
Serpentine Flow Field

A Low-Cost PTFE-Reinforced Integral Multilayered Self-Humidifying Membrane for PEM Fuel Cells

2006 ◽  
Vol 9 (7) ◽  
pp. A332 ◽  
Author(s):  
Yu Zhang ◽  
Hua-Min Zhang ◽  
Xiao-Bing Zhu ◽  
Yong-Min Liang
Keyword(s):  
Fuel Cells ◽  
Low Cost ◽  
Pem Fuel Cells

scholarly journals N-doped carbon nanomaterials are durable catalysts for oxygen reduction reaction in acidic fuel cells

2015 ◽  
Vol 1 (1) ◽  
pp. e1400129 ◽  
Author(s):  
Jianglan Shui ◽  
Min Wang ◽  
Feng Du ◽  
Liming Dai
Keyword(s):  
Fuel Cells ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Carbon Nanomaterials ◽  
Low Cost ◽  
Clean Energy ◽  
Pem Fuel Cells ◽  
Reduction Reaction ◽  
Metal Free ◽  
Carbon Based

The availability of low-cost, efficient, and durable catalysts for oxygen reduction reaction (ORR) is a prerequisite for commercialization of the fuel cell technology. Along with intensive research efforts of more than half a century in developing nonprecious metal catalysts (NPMCs) to replace the expensive and scarce platinum-based catalysts, a new class of carbon-based, low-cost, metal-free ORR catalysts was demonstrated to show superior ORR performance to commercial platinum catalysts, particularly in alkaline electrolytes. However, their large-scale practical application in more popular acidic polymer electrolyte membrane (PEM) fuel cells remained elusive because they are often found to be less effective in acidic electrolytes, and no attempt has been made for a single PEM cell test. We demonstrated that rationally designed, metal-free, nitrogen-doped carbon nanotubes and their graphene composites exhibited significantly better long-term operational stabilities and comparable gravimetric power densities with respect to the best NPMC in acidic PEM cells. This work represents a major breakthrough in removing the bottlenecks to translate low-cost, metal-free, carbon-based ORR catalysts to commercial reality, and opens avenues for clean energy generation from affordable and durable fuel cells.

Development of flow field plates based on asymmetric leaf structure for PEM fuel cells

2017 ◽  
Vol 11 (4) ◽  
pp. 229 ◽  
Author(s):  
Tao Chen ◽  
ShiHua Liu ◽  
Li Yang
Keyword(s):  
Fuel Cells ◽  
Flow Field ◽  
Pem Fuel Cells ◽  
Leaf Structure

Toward optimization of a robust low‐cost sulfonated‐polyethersulfone containing layered double hydroxide for PEM fuel cells

2019 ◽  
Vol 136 (34) ◽  
pp. 47884 ◽  
Author(s):  
Cataldo Simari ◽  
Carmelo Lo Vecchio ◽  
Apostolos Enotiadis ◽  
Mariano Davoli ◽  
Vincenzo Baglio ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Layered Double Hydroxide ◽  
Low Cost ◽  
Pem Fuel Cells ◽  
Double Hydroxide ◽  
Sulfonated Polyethersulfone
Sign in / Sign up

Export Citation Format

Share Document