scholarly journals Investigation Of Short-Side-Chain Ionomer And Membrane For Proton Exchange Membrane Fuel Cells

2018 ◽  
Author(s):  
Samaneh Shahgaldi ◽  
Adnan Ozden ◽  
Xianguo Li
Keyword(s):  
Fuel Cells ◽  
Proton Exchange Membrane ◽  
Proton Exchange ◽  
Side Chain ◽  
Short Side ◽  
Exchange Membrane

scholarly journals Cathode Design for Proton Exchange Membrane Fuel Cells in Automotive Applications

2021 ◽  
Author(s):  
Haojie Wang ◽  
Ruiqing Wang ◽  
Sheng Sui ◽  
Tai Sun ◽  
Yichang Yan ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Fuel Cell ◽  
Power Density ◽  
Proton Exchange Membrane ◽  
Knudsen Diffusion ◽  
Proton Exchange ◽  
Short Side ◽  
Cathode Design ◽  
Highly Active ◽  
Exchange Membrane

AbstractAn advanced cathode design can improve the power performance and durability of proton exchange membrane fuel cells (PEMFCs), thus reducing the stack cost of fuel cell vehicles (FCVs). Recent studies on highly active Pt alloy catalysts, short-side-chain polyfluorinated sulfonic acid (PFSA) ionomer and 3D-ordered electrodes have imparted PEMFCs with boosted power density. To achieve the compacted stack target of 6 kW/L or above for the wide commercialization of FCVs, developing available cathodes for high-power-density operation is critical for the PEMFC. However, current developments still remain extremely challenging with respect to highly active and stable catalysts in practical operation, controlled distribution of ionomer on the catalyst surface for reducing catalyst poisoning and oxygen penetration losses and 3D (three-dimensional)-ordered catalyst layers with low Knudsen diffusion losses of oxygen molecular. This review paper focuses on impacts of the cathode development on automotive fuel cell systems and concludes design directions to provide the greatest benefit.

scholarly journals Superior Proton Exchange Membrane Fuel Cell (PEMFC) Performance Using Short-Side-Chain Perfluorosulfonic Acid (PFSA) Membrane and Ionomer

Materials ◽  
2021 ◽  
Vol 15 (1) ◽  
pp. 78
Author(s):  
Nana Zhao ◽  
Zhiqing Shi ◽  
Francois Girard
Keyword(s):  
Fuel Cell ◽  
Proton Exchange Membrane ◽  
Proton Exchange ◽  
Cell Performance ◽  
Superior Performance ◽  
Side Chain ◽  
Perfluorosulfonic Acid ◽  
Short Side ◽  
Fuel Cell Performance ◽  
Exchange Membrane

Optimization of the ionomer materials in catalyst layers (CLs) which sometimes is overlooked has been equally crucial as selection of the membranes in membrane electrode assembly (MEA) for achieving a superior performance in proton exchange membrane fuel cells (PEMFCs). Four combinations of the MEAs composed of short-side-chain (SSC) and long-side-chain (LSC) perfluorosulfonic acid (PFSA) polymers as membrane and ionomer materials have been prepared and tested under various temperatures and humidity conditions, aiming to investigate the effects of different side chain polymer in membranes and CLs on fuel cell performance. It is discovered that SSC PFSA polymer used as membrane and ionomer in CL yields better fuel cell performance than LSC PFSA polymer, especially at high temperature and low RH conditions. The MEA with the SSC PFSA employed both as a membrane and as an ionomer in cathode CL demonstrates the best cell performance amongst the investigated MEAs. Furthermore, various electrochemical diagnoses have been applied to fundamentally understand the contributions of the different resistances to the overall cell performance. It is illustrated that the charge transfer resistance (Rct) made the greatest contribution to the overall cell resistance and then membrane resistance (Rm), implying that the use of the advanced ionomer in CL could lead to more noticeable improvement in cell performance than only the substitution as the membrane.

Proton exchange membrane water electrolysis with short-side-chain Aquivion® membrane and IrO2 anode catalyst

2014 ◽  
Vol 39 (12) ◽  
pp. 6307-6316 ◽  
Author(s):  
Anita Skulimowska ◽  
Marc Dupont ◽  
Marta Zaton ◽  
Svein Sunde ◽  
Luca Merlo ◽  
...  
Keyword(s):  
Proton Exchange Membrane ◽  
Water Electrolysis ◽  
Proton Exchange ◽  
Side Chain ◽  
Anode Catalyst ◽  
Short Side ◽  
Exchange Membrane

scholarly journals Effect of Annealing on Proton Conductivity of Aquivion-Like Proton-Exchange Membrane

2020 ◽  
Vol 869 ◽  
pp. 367-374
Author(s):  
Kamila R. Mugtasimova ◽  
Alexey P. Melnikov ◽  
Elena A. Galitskaya ◽  
Ivan A. Ryzhkin ◽  
Dimitri A. Ivanov ◽  
...  
Keyword(s):  
Proton Conductivity ◽  
Proton Exchange Membrane ◽  
Temperature Treatment ◽  
Proton Exchange ◽  
Side Chain ◽  
Short Side ◽  
Transport Characteristic ◽  
Water Behavior ◽  
Solution Casting Method ◽  
Exchange Membrane

Proton-conducting membranes were fabricated from a new short-side chain ionomer Inion (Russian analogue of Aquivion) by solution casting method. A series of temperature treatment experiments was conducted to show that annealing of Inion membranes at the temperature range from 160 °C to 170 °C leads to a significant increase of specific proton conductivity to values even higher than those of commercial membrane Nafion NR212. An explanation of this fact can be given by considering the membranes’ proton transport mechanism and water behavior models in nanopores. Matching the proton conductivity mechanism of the membranes, which is realized in nanostructured channels with the diameter of about several nanometers according to the Grotthuss proton hopping mechanism, and the model of water and ice states in nanopores leads to the comprehensive understanding for the further optimization of the membranes to achieve high transport characteristic. For example, it can be improved by increasing the number of side-chain branches of the polymer.

New Multi Acid Side-Chain Ionomers for Proton Exchange Membrane Fuel Cells

2019 ◽  
Vol 33 (1) ◽  
pp. 627-633 ◽  
Author(s):  
Mark S. Schaberg ◽  
John E. Abulu ◽  
Gregory M. Haugen ◽  
Michael A. Emery ◽  
Sara J. O'Conner ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Proton Exchange Membrane ◽  
Proton Exchange ◽  
Side Chain ◽  
Exchange Membrane
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