scholarly journals Degradation identification and prognostics of proton exchange membrane fuel cell under dynamic load

2022 ◽  
Vol 118 ◽  
pp. 104959
Author(s):  
Meiling Yue ◽  
Zhongliang Li ◽  
Robin Roche ◽  
Samir Jemei ◽  
Noureddine Zerhouni
Keyword(s):  
Fuel Cell ◽  
Dynamic Load ◽  
Proton Exchange Membrane ◽  
Proton Exchange ◽  
Exchange Membrane

Effect of dynamic load on the temperature profiles and cooling response time of a proton exchange membrane fuel cell

2018 ◽  
Vol 91 (3) ◽  
pp. 349-357 ◽  
Author(s):  
Wan Ahmad Najmi Wan Mohamed ◽  
Siti Fatimah Abu Talib ◽  
Irnie Azlin Zakaria ◽  
Aman Mohd Ihsan Mamat ◽  
Wan Ramli Wan Daud
Keyword(s):  
Fuel Cell ◽  
Response Time ◽  
Dynamic Load ◽  
Proton Exchange Membrane ◽  
Proton Exchange ◽  
Temperature Profiles ◽  
Exchange Membrane

Highly proton conductive membranes based on carboxylated cellulose nanofibres and their performance in proton exchange membrane fuel cells

2019 ◽  
Author(s):  
Valentina Guccini ◽  
Annika Carlson ◽  
Shun Yu ◽  
Göran Lindbergh ◽  
Rakel Wreland Lindström ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Fuel Cell ◽  
Surface Charge ◽  
Proton Exchange Membrane ◽  
Membrane Surface ◽  
Proton Exchange ◽  
Membrane Thickness ◽  
Fuel Cell Performance ◽  
Cellulose Nanofibres ◽  
Exchange Membrane

The performance of thin carboxylated cellulose nanofiber-based (CNF) membranes as proton exchange membranes in fuel cells has been measured in-situ as a function of CNF surface charge density (600 and 1550 µmol g<sup>-1</sup>), counterion (H<sup>+</sup>or Na<sup>+</sup>), membrane thickness and fuel cell relative humidity (RH 55 to 95 %). The structural evolution of the membranes as a function of RH as measured by Small Angle X-ray scattering shows that water channels are formed only above 75 % RH. The amount of absorbed water was shown to depend on the membrane surface charge and counter ions (Na<sup>+</sup>or H<sup>+</sup>). The high affinity of CNF for water and the high aspect ratio of the nanofibers, together with a well-defined and homogenous membrane structure, ensures a proton conductivity exceeding 1 mS cm<sup>-1</sup>at 30 °C between 65 and 95 % RH. This is two orders of magnitude larger than previously reported values for cellulose materials and only one order of magnitude lower than Nafion 212. Moreover, the CNF membranes are characterized by a lower hydrogen crossover than Nafion, despite being ≈ 30 % thinner. Thanks to their environmental compatibility and promising fuel cell performance the CNF membranes should be considered for new generation proton exchange membrane fuel cells.<br>

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