Dually cross-linked polymer electrolyte membranes for direct methanol fuel cells

Lee, Won Hyo; Lee, Kang Hyuck; Shin, Dong Won; Hwang, Doo Sung; Na, Kang; Cho, Doo Hee; Kim, Ji Hoon; Lee, Young Moo

doi:10.1016/j.jpowsour.2015.01.191

Cited by 37 publications

(17 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The double cross‐link had a beneficial effect on the conductivity (3.2 × 10 −2 S cm −1 , 25°C and 5.8 × 10 −2 S cm −1 , 80°C) and methanol permeability. Lee applied a dual cross‐link process involving different points of cross‐link, ie, the ionic cross‐link and end‐group cross‐link. This dual cross‐link process provided enhancements in the chemical and thermal stability and mechanical properties.…”

Section: Additives In Different Types Of Membranesmentioning

confidence: 99%

Recent advances in additive‐enhanced polymer electrolyte membrane properties in fuel cell applications: An overview

2019

View full text Add to dashboard Cite

Summary Additives such as fillers, cross‐linkers, and plasticizers have become increasingly important in the polymer nanocomposite production field, especially for enhancing the structural morphology, functional behavior, and final performance of nanocomposites in broad applications. The current work is an overview of the effects of additive substances such as fillers, cross‐linkers, and plasticizers in the polymer electrolyte membrane composites applied to fuel cells. A comparative review is conducted by categorizing fillers into several types, and the most popular cross‐linkers and plasticizers used in fuel cell membranes are included in this review. The highlighted properties include the proton conductivity, permeability, mechanical properties, thermal properties, crystallinity, and structure of additive‐modified nanocomposites. Furthermore, the challenges and future prospects in the additive field are discussed in Section 5.0. This review can provide a reference for researchers seeking specific substances that can be used to enhance nanocomposite properties, especially in membrane fuel cell applications.

show abstract

Section: Additives In Different Types Of Membranesmentioning

confidence: 99%

Recent advances in additive‐enhanced polymer electrolyte membrane properties in fuel cell applications: An overview

2019

View full text Add to dashboard Cite

show abstract

“…In this method two compounds combine to form a crosslink. This method has been used in the preparation of PEM [93], alkaline membrane [94], direct methanol fuel cell [95] In a work by An et al [96], the crosslink was formed by Benhydrol and sulfonic acid and this was shown on NMR and FTIR. Crosslinking method is a widely used in the preparation of membrane.…”

Section: Crosslinking Methodsmentioning

confidence: 99%

Fuel cell membranes – Pros and cons

Ogungbemi

Ijaodola

Khatib

et al. 2019

Energy

174

View full text Add to dashboard Cite

This investigation provides a critical analysis of the development of PEM fuel cells and related research with specific focus on the membrane material. The catalytic membrane is the most important component of the PEMFC giving rise to the need for the use of efficient, durable and cheap material to reduce the overall cost of the fuel cell. In this work, the need for materials other than Nafion to be used as PEM membranes is established and a case for the use of composite membranes material in fuel cells is made. Composite membranes increase the cell voltage by up to 11% even at high cell operating temperature of 95°C. They also increase the overall performance of the cell by up to 17% when dry hydrogen is utilised.Non-fluorinated membranes are also suitable for use in fuel cells for portable applications but they are very expensive and less conductive. Partially fluorinated membranes have good mechanical stability but expensive. The fluorinated membrane has high stability under oxidation and reduction conditions. Unfortunately, they only reach their optimum performance at ACCEPTED MANUSCRIPT 1 temperatures below 100°C which makes them of limited use in PEM fuel cells application at higher temperatures.

show abstract

“…However, because cross‐linked structures are usually achieved by consuming the ion exchangeable functional groups and accompanied by connecting the polymer backbones decreasing the polymer chain mobility, cross‐linked membranes, in most cases, exhibit much lower proton conductivity than the membranes from the corresponding linear polymers 15,16 . End‐group cross‐linking technique using end‐group functionalized SHPs has been found to be effective for improving physicochemical properties while minimizing the proton conductivity decrease since the sulfonic acid groups are not consumed during cross‐linking process and the reduction of the polymer chain mobility owing to the interconnected polymer backbones can be minimized 17,18 . Recently, our group has reported the end‐group cross‐linked membranes using thiol‐terminated SPAES with a DS of 70 mol% (SPAES70) and multifunctional cross‐linkers containing vinyl groups via the thiol‐ene click reaction 19,20 …”

Section: Introductionmentioning

confidence: 99%

End‐group cross‐linked membranes based on highly sulfonated poly(arylene ether sulfone) with vinyl functionalized graphene oxide as a cross‐linker and a filler for proton exchange membrane fuel cell application

Kim

Kım

Han

et al. 2020

Journal of Polymer Science

View full text Add to dashboard Cite

High-performance end-group cross-linked sulfonated poly(arylene ether sulfone) (SPAES) membranes are developed using thiolate-terminated SPAES with very high degree of sulfonation (DS) such as 90 mol% (SK-SPAES90) and vinyl functionalized graphene oxide (VGO) as a cross-linker and a filler through the thiol-Michael addition reaction. Since free-standing membranes for fuel cell application could not be prepared using the water soluble and highly proton conductive SPAES with high DS of 90 mol%, cross-linked SPAES90 membranes are intentionally prepared. The cross-linked membranes are found to have good physicochemical properties with excellent proton conductivity that can be applied for the proton exchange membrane. In particular, the cross-linked SPAES90 membrane prepared using 1.0 wt% of VGO exhibits better dimensional stability than a SPAES70 membrane from the linear SPAES with DS of 70 mol% and the proton conductivities of this membrane are larger than those of Nafion 211 at 80 C under different relative humidity conditions (40%-95%).

show abstract

Dually cross-linked polymer electrolyte membranes for direct methanol fuel cells

Cited by 37 publications

References 41 publications

Recent advances in additive‐enhanced polymer electrolyte membrane properties in fuel cell applications: An overview

Recent advances in additive‐enhanced polymer electrolyte membrane properties in fuel cell applications: An overview

Fuel cell membranes – Pros and cons

End‐group cross‐linked membranes based on highly sulfonated poly(arylene ether sulfone) with vinyl functionalized graphene oxide as a cross‐linker and a filler for proton exchange membrane fuel cell application

Contact Info

Product

Resources

About