Chemical Stability via Radical Decomposition Using Silicotungstic Acid Moieties for Polymer Electrolyte Fuel Cells

2018 ◽  
Vol 165 (14) ◽  
pp. F1264-F1269
Author(s):  
Andrew R. Motz ◽  
Mei-Chen Kuo ◽  
Guido Bender ◽  
Bryan S. Pivovar ◽  
Andrew M. Herring
Keyword(s):  
Fuel Cells ◽  
Polymer Electrolyte ◽  
Chemical Stability ◽  
Polymer Electrolyte Fuel Cells ◽  
Silicotungstic Acid ◽  
Radical Decomposition

scholarly journals Effects of cesium-substituted silicotungstic acid doped with polybenzimidazole membrane for the application of medium temperature polymer electrolyte fuel cells

2019 ◽  
Vol 83 ◽  
pp. 01008 ◽  
Author(s):  
Kyaw Zay Ya ◽  
Pascal Nbelayim ◽  
Wai Kian Tan ◽  
Go Kawamura ◽  
Hiroyuki Muto ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Phosphoric Acid ◽  
Polymer Electrolyte ◽  
Mechanical Milling ◽  
Composite Membranes ◽  
Polymer Electrolyte Fuel Cells ◽  
Constant Current ◽  
Silicotungstic Acid ◽  
Wet Milling ◽  
Medium Temperature

Inorganic-organic composite membranes were prepared by using partly cesium-substituted silicotungstic acid (CHS-WSiA) and polybenzimidazole (PBI, MRS0810H) for medium temperature polymer electrolyte fuel cells (MT-PEFCs). Cesium hydrogen sulfate (CsHSO4, CHS) and silicotungstic acid (H4SiW12O40, WSiA) were milled to obtain 0.5CHS-0.5WSiA composites by dry and wet mechanical millings. N,Ndimethylacetamide (DMAc) was used as a disperse medium in the preparation of the inorganic solid acids by wet mechanical milling and also a casting agent for fabrication of membrane. Finally, flexible and homogeneous composite membranes with several phosphoric acid doping levels (PADLs) were obtained. The wet mechanical milling using DMAc was found to effectively promote good substitution of H+ ion in WSiA by Cs+ ion of CHS and promoted the formation of smaller grain sizes of composites, compared with dry milling. A high maximum power density of 378 mWcm-2 and a good constant current stability test were obtained from a single cell test using the PBI composite membrane containing 20 wt% of 0.5CHS-0.5WSiA from wet milling and phosphoric acid doping level (PADL) of 8 mol, at 150 °C under an anhydrous condition. Wet milling CHS-WSiA crystallites were highly dispersed in PBI to give homogenized membranes and played a significant role in the enhancemance of acidity by increasing the number of proton sites in the electrolyte membrane. After the addition of CHS-WSiA into PBI membrane, the acid and water retention properties were improved and incorporated as new proton conduction path by adsorbing phosphoric acid in these composite electrolyte membranes. These observations suggest that composite membranes with 8 mol of PADL are good promising PA dopedmembranes with effective electrochemical properties for the medium temperature fuel cells.

scholarly journals Synthesis of catalysts with fine platinum particles supported by high-surface-area activated carbons and optimization of their catalytic activities for polymer electrolyte fuel cells

RSC Advances ◽  
2021 ◽  
Vol 11 (33) ◽  
pp. 20601-20611
Author(s):  
Md. Mijanur Rahman ◽  
Kenta Inaba ◽  
Garavdorj Batnyagt ◽  
Masato Saikawa ◽  
Yoshiki Kato ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Polymer Electrolyte ◽  
High Performance ◽  
Activated Carbons ◽  
Low Cost ◽  
High Surface ◽  
High Surface Area ◽  
Polymer Electrolyte Fuel Cells ◽  
Supported Platinum ◽  
Platinum Particles

Herein, we demonstrated that carbon-supported platinum (Pt/C) is a low-cost and high-performance electrocatalyst for polymer electrolyte fuel cells (PEFCs).

Iron-Based Catalysts with Improved Oxygen Reduction Activity in Polymer Electrolyte Fuel Cells

Science ◽  
2009 ◽  
Vol 324 (5923) ◽  
pp. 71-74 ◽  
Author(s):  
Michel Lefèvre ◽  
Eric Proietti ◽  
Frédéric Jaouen ◽  
Jean-Pol Dodelet
Keyword(s):  
Fuel Cells ◽  
Oxygen Reduction ◽  
Polymer Electrolyte ◽  
Polymer Electrolyte Fuel Cells ◽  
Reduction Activity ◽  
Iron Based ◽  
Iron Based Catalysts

Polybenzimidazole and ionic liquid composite membranes for high temperature polymer electrolyte fuel cells

2021 ◽  
Vol 361 ◽  
pp. 115569
Author(s):  
Bingbing Niu ◽  
Shijing Luo ◽  
Chunling Lu ◽  
Wendi Yi ◽  
Jiantao Liang ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Fuel Cells ◽  
High Temperature ◽  
Polymer Electrolyte ◽  
Composite Membranes ◽  
Polymer Electrolyte Fuel Cells
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