scholarly journals Control of Microdomain Orientation in Block Copolymer Thin Films by Electric Field for Proton Exchange Membrane

2014 ◽  
Vol 04 (02) ◽  
pp. 95-102 ◽  
Author(s):  
Joonwon Bae
Keyword(s):  
Thin Films ◽  
Block Copolymer ◽  
Electric Field ◽  
Proton Exchange Membrane ◽  
Proton Exchange ◽  
Exchange Membrane

Electrospun Nafion Nanofiber for Proton Exchange Membrane Fuel Cell Application

2009 ◽  
Vol 6 (3) ◽  
Author(s):  
R. Bajon ◽  
S. Balaji ◽  
S. M. Guo
Keyword(s):  
Electric Field ◽  
Porous Structure ◽  
Active Sites ◽  
Proton Exchange Membrane ◽  
Gas Diffusion ◽  
Proton Exchange ◽  
Membrane Electrode ◽  
Surface Charges ◽  
Power Sources ◽  
Exchange Membrane

Proton exchange membrane fuel cells (PEMFCs) are attractive power plants for use in many applications, including portable power sources, electric vehicles, and on-site combined power/heat plants, due to the inherently high efficiency and low emission. The membrane electrode assembly (MEA) is the key component of a PEMFC. A standard five layer MEA consists of a proton exchange membrane, two catalyst layers, and two gas diffusion layers. The most commonly used electrolyte material is proton conductive perfluorinated sulfonic acid membrane, such as Nafion. Hydrogen is oxidized at the anode/electrolyte interface, the so-called triple-phase-boundary (TPB) active sites. TPB region must be a good electron conductor, a good ion conductor, and a porous structure for fuel/air diffusion. Typical PEMFC TPB is a porous structure made with Nafion and catalyst particle mixture. In this paper, electrospinning is used to synthesize polymer/Nafion nanofibers. Electrospinning is a straightforward method that has been successfully used to prepare fibers or fiber mats from a broad range of organic polymers. In the electrospinning process, a polymer solution held by its surface tension at the end of a capillary tube is subjected to an electric field, and as the electric field strength increases, a solid fiber is generated as the electrified jet is continuously stretched because of the electrostatic repulsions between the surface charges and the evaporation of solvent. Uniform one-dimensional Nafion nanofibers have been fabricated using Nafion solution and solutions containing polyvinyl pyrrolidone, polyethylene oxide, and polyvinyl alcohol. The morphologies of polymer/Nafion nanofibers, fabricated under different electrospinning conditions and different polymer compositions, are presented.

Novel partially fluorinated graft block copolymer ionomer as potential proton exchange membrane material

Polymer ◽  
2016 ◽  
Vol 95 ◽  
pp. 91-101 ◽  
Author(s):  
Cigdem Bilir ◽  
Tuba Erdogan ◽  
Serhat Odabas ◽  
Elif Erdal Unveren
Keyword(s):  
Block Copolymer ◽  
Proton Exchange Membrane ◽  
Proton Exchange ◽  
Membrane Material ◽  
Exchange Membrane

Alternative Catalyst Supports Deposited on Nanostructured Thin Films for Proton Exchange Membrane Fuel Cells

2010 ◽  
Vol 157 (2) ◽  
pp. B187 ◽  
Author(s):  
Arnd Garsuch ◽  
D. A. Stevens ◽  
R. J. Sanderson ◽  
S. Wang ◽  
R. T. Atanasoski ◽  
...  
Keyword(s):  
Thin Films ◽  
Fuel Cells ◽  
Proton Exchange Membrane ◽  
Proton Exchange ◽  
Catalyst Supports ◽  
Nanostructured Thin Films ◽  
Exchange Membrane

Sulfonated graphene oxide-decorated block copolymer as a proton-exchange membrane: improving the ion selectivity for all-vanadium redox flow batteries

2018 ◽  
Vol 6 (36) ◽  
pp. 17740-17750 ◽  
Author(s):  
Md. Abdul Aziz ◽  
Sangaraju Shanmugam
Keyword(s):  
Graphene Oxide ◽  
Block Copolymer ◽  
Proton Exchange Membrane ◽  
Ion Selectivity ◽  
Proton Exchange ◽  
Discharge Time ◽  
Redox Flow Batteries ◽  
Sulfonated Graphene ◽  
Exchange Membrane ◽  
Vanadium Redox

A SPEKS/sGO composite membrane with superior ion selectivity and chemical stability was synthesized. The composite and pristine SPEKS membranes exhibited a 10.4- and 6.5-times greater self-discharge time compared with the commercial Nafion-212 membrane.

Inorganic modification of block copolymer for medium temperature proton exchange membrane application

2010 ◽  
Vol 351 (1-2) ◽  
pp. 168-177 ◽  
Author(s):  
Mayur K. Mistry ◽  
Namita Roy Choudhury ◽  
Naba K. Dutta ◽  
Robert Knott
Keyword(s):  
Block Copolymer ◽  
Proton Exchange Membrane ◽  
Proton Exchange ◽  
Medium Temperature ◽  
Exchange Membrane

A sulfonated polybenzophenone/polyimide copolymer as a novel proton exchange membrane

RSC Advances ◽  
2015 ◽  
Vol 5 (62) ◽  
pp. 50082-50086 ◽  
Author(s):  
Takahiro Miyahara ◽  
Junpei Miyake ◽  
Soichi Matsuno ◽  
Masahiro Watanabe ◽  
Kenji Miyatake
Keyword(s):  
Fuel Cell ◽  
Block Copolymer ◽  
Proton Conductivity ◽  
Proton Exchange Membrane ◽  
Gas Permeability ◽  
Proton Exchange ◽  
High Proton Conductivity ◽  
High Proton ◽  
Exchange Membrane

A sulfonated polybenzophenone/polyimide block copolymer membrane exhibited high proton conductivity, good dimensional and mechanical stabilities, and low gas permeability, which are attractive for fuel cell applications.

Highly durable fuel cell catalysts using crosslinkable block copolymer-based carbon supports with ultralow Pt loadings

2020 ◽  
Vol 13 (12) ◽  
pp. 4921-4929
Author(s):  
Juhyuk Choi ◽  
Young Jun Lee ◽  
Dongmin Park ◽  
Hojin Jeong ◽  
Sangyong Shin ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Fuel Cell ◽  
Block Copolymer ◽  
Proton Exchange Membrane ◽  
Proton Exchange ◽  
Carbon Supports ◽  
Fuel Cell Catalysts ◽  
Ptfe Nanoparticles ◽  
Exchange Membrane

The catalyst in which carbon shells encapsulate PtFe nanoparticles shows superior activity and durability for proton exchange membrane fuel cells.

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