scholarly journals Ladder-type sulfonated poly(arylene perfluoroalkylene)s for high performance proton exchange membrane fuel cells

RSC Advances ◽  
2020 ◽  
Vol 10 (67) ◽  
pp. 41058-41064
Author(s):  
Zhi Long ◽  
Junpei Miyake ◽  
Kenji Miyatake
Keyword(s):  
Fuel Cell ◽  
High Performance ◽  
Proton Exchange Membrane ◽  
Mechanical Stability ◽  
Proton Exchange ◽  
Easy Method ◽  
Fuel Cell Performance ◽  
Exchange Membrane ◽  
Sulfonated Poly

Sulfone-bonded ladder-type sulfonated poly(arylene perfluoroalkylene)s (SPAF-P-Lad) were synthesized by an easy method to achieve high thermo-mechanical stability, proton conductivity, fuel cell performance and remarkable in situ durability.

In situ metal ion contamination and the effects on proton exchange membrane fuel cell performance

2011 ◽  
Vol 196 (21) ◽  
pp. 8967-8972 ◽  
Author(s):  
Mark Sulek ◽  
Jim Adams ◽  
Steve Kaberline ◽  
Mark Ricketts ◽  
James R. Waldecker
Keyword(s):  
Fuel Cell ◽  
Metal Ion ◽  
Proton Exchange Membrane ◽  
Proton Exchange ◽  
Cell Performance ◽  
Fuel Cell Performance ◽  
Exchange Membrane

Investigation of Pyrocarbon Based Carbon Paper for Proton Exchange Membrane Fuel Cells

2010 ◽  
Vol 156-157 ◽  
pp. 447-450
Author(s):  
Ming Yu Zhang ◽  
Li Ping Wang ◽  
Zhe An Su ◽  
Qi Zhong Huang
Keyword(s):  
Electron Microscope ◽  
Fuel Cell ◽  
Surface Morphology ◽  
Proton Exchange Membrane ◽  
Polarized Light ◽  
Proton Exchange ◽  
Carbon Paper ◽  
Fuel Cell Performance ◽  
Exchange Membrane

A proprietary in situ chemical vapor deposition (CVD) process was developed to grow a layer of pyrocarbon on carbon paper preform for proton exchange membrane fuel cells (PEMFC). The carbon paper preform is continuously manufactured by dry method. The characteristics of the carbon paper such as surface morphology, polarized light characteristics, and cross-section morphology were characterized using electron microscope, polarized light microscope, respectively. Fuel cell performance of the carbon paper was evaluated using single cell with hydrogen/air at various relative humidity (RH) conditions. The carbon paper with in situ growth of pyrocarbon showed significant improvement in lowering in-plane electrical resistance as well as fuel cell performance at dry condition. The carbon paper as seen under scanning electron microscope showed excellent surface morphology with pyrocarbon connecting carbon fibers tightly by CVD process.

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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