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

2019 ◽  
Vol 7 (43) ◽  
pp. 25032-25039 ◽  
Author(s):  
Valentina Guccini ◽  
Annika Carlson ◽  
Shun Yu ◽  
Göran Lindbergh ◽  
Rakel Wreland Lindström ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Low Temperature ◽  
Proton Exchange Membrane ◽  
Proton Exchange Membranes ◽  
Proton Exchange ◽  
Suitable Material ◽  
Conductive Membranes ◽  
Cellulose Nanofibres ◽  
Exchange Membrane

Thin carboxylated cellulose nanofibres are a suitable material to fabricate low temperature proton exchange membranes fuel cells.

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>

Electrospun Nanofibers for Low-Temperature Proton Exchange Membrane Fuel Cells

2015 ◽  
pp. 29-60 ◽  
Author(s):  
Surya Subianto ◽  
Stefano Giancola ◽  
Giorgio Ercolano ◽  
Yannick Nabil ◽  
Deborah Jones ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Low Temperature ◽  
Proton Exchange Membrane ◽  
Electrospun Nanofibers ◽  
Proton Exchange ◽  
Exchange Membrane

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.

Effect of diffusion layers fabricated with different fiber diameters on the performance of low temperature proton exchange membrane fuel cells

2013 ◽  
Vol 221 ◽  
pp. 134-140 ◽  
Author(s):  
Chih-Jung Hung ◽  
Ching-Han Liu ◽  
Tse-Hao Ko ◽  
Wei-Hung Chen ◽  
Shu-Hui Cheng ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Low Temperature ◽  
Proton Exchange Membrane ◽  
Proton Exchange ◽  
Diffusion Layers ◽  
Exchange Membrane

scholarly journals UV-crosslinked poly(arylene ether sulfone) – LAPONITE® nanocomposites for proton exchange membranes

RSC Advances ◽  
2017 ◽  
Vol 7 (45) ◽  
pp. 28358-28365 ◽  
Author(s):  
Sun Hwa Lee ◽  
Won Jun Lee ◽  
Tae Kyoung Kim ◽  
Mustafa K. Bayazit ◽  
Sang Ouk Kim ◽  
...  
Keyword(s):  
Fuel Cells ◽  
High Performance ◽  
Proton Exchange Membrane ◽  
Proton Exchange Membranes ◽  
Proton Exchange ◽  
Clay Nanocomposites ◽  
Arylene Ether ◽  
Exchange Membrane ◽  
Sulfonated Poly

UV-crosslinked sulfonated poly(arylene sulfone)/clay nanocomposites are fabricated by incorporating UV-crosslinkable monomers, bridge molecules, and clay nanofillers for high performance proton exchange membrane fuel cells.

Functionalized mesoporous structured inorganic materials as high temperature proton exchange membranes for fuel cells

2014 ◽  
Vol 2 (21) ◽  
pp. 7637-7655 ◽  
Author(s):  
San Ping Jiang
Keyword(s):  
Fuel Cells ◽  
High Temperature ◽  
Mesoporous Silica ◽  
Proton Exchange Membrane ◽  
Proton Exchange Membranes ◽  
Proton Exchange ◽  
Inorganic Materials ◽  
Nanocomposite Membranes ◽  
Functionalized Mesoporous Silica ◽  
Exchange Membrane

High temperature proton exchange membrane fuel cells based on functionalized mesoporous silica nanocomposite membranes.

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