Positron annihilation spectroscopy studies of proton exchange membranes used in fuel cells

2015 ◽  
Vol 26 (12) ◽  
pp. 1528-1530 ◽  
Author(s):  
Florin Constantin ◽  
Catalina Barna ◽  
Paul Mereuta
Keyword(s):  
Fuel Cells ◽  
Positron Annihilation ◽  
Positron Annihilation Spectroscopy ◽  
Proton Exchange Membranes ◽  
Proton Exchange ◽  
Spectroscopy Studies

Crosslinked PVA/SSA proton exchange membranes: correlation between physiochemical properties and free volume determined by positron annihilation spectroscopy

2018 ◽  
Vol 20 (44) ◽  
pp. 28287-28299 ◽  
Author(s):  
Mahmoud M. Gomaa ◽  
Christoph Hugenschmidt ◽  
Marcel Dickmann ◽  
Esam E. Abdel-Hady ◽  
Hamdy F. M. Mohamed ◽  
...  
Keyword(s):  
Positron Annihilation ◽  
Free Volume ◽  
Positron Annihilation Spectroscopy ◽  
Proton Exchange Membranes ◽  
Proton Exchange ◽  
Water Molecules ◽  
High Humidity ◽  
Physiochemical Properties ◽  
Low Humidity ◽  
Volume Size

At low humidity (<30 RH%), water molecules begin to fill the intermolecular spaces in the membrane. At high humidity (80 RH%) the membrane swells; the free volume size increases.

scholarly journals High Performance Cross-Linked Poly(2-acrylamido-2-methylpropanesulfonic acid)-Based Proton Exchange Membranes for Fuel Cells

2010 ◽  
Vol 43 (15) ◽  
pp. 6398-6405 ◽  
Author(s):  
Hanbin Diao ◽  
Feng Yan ◽  
Lihua Qiu ◽  
Jianmei Lu ◽  
Xinhua Lu ◽  
...  
Keyword(s):  
Fuel Cells ◽  
High Performance ◽  
Proton Exchange Membranes ◽  
Proton Exchange

Obtaining Proton-Exchange Membranes of Fuel Cells from Natural Filling Agents to be Used for Vehicles

2018 ◽  
Vol 277 ◽  
pp. 241-250
Author(s):  
Olena Svietkina ◽  
Stanislav Bartashevskyi ◽  
Valeriy Nikolsky ◽  
Kostiantyn Bas ◽  
Peter Chlens ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Fuel Cells ◽  
Composite Materials ◽  
Proton Exchange Membrane ◽  
Membrane Conductance ◽  
Proton Exchange Membranes ◽  
Proton Exchange ◽  
Travel Distance ◽  
Electric Locomotive ◽  
Exchange Membrane

Methods to increase travel distance of mine electric locomotive from one charging at the expense of fuel cells with proton-exchange membrane and to improve efficiency of the process as a result of using selective composite materials have been considered. It has been demonstrated that the use of activated natural materials will make it possible to increase membrane conductance up to 3.6·10−2Cm·cm−1; that will allow increasing energy-efficiency of fuel cells for their operation in terms of mine electric locomotives.

scholarly journals Nafion phosphonic acid composite membranes for proton exchange membranes fuel cells

2019 ◽  
Vol 487 ◽  
pp. 889-897 ◽  
Author(s):  
Fátima C. Teixeira ◽  
Ana I. de Sá ◽  
António P.S. Teixeira ◽  
C.M. Rangel
Keyword(s):  
Fuel Cells ◽  
Phosphonic Acid ◽  
Composite Membranes ◽  
Proton Exchange Membranes ◽  
Proton Exchange
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