Locally confined membrane modification of sulfonated membranes for fuel cell application

Krishnan, N. Nambi; Henkensmeier, Dirk; Jang, Jong Hyun; Hink, Steffen; Kim, Hyoung Juhn; Nam, Suk Woo; Lim, Tae Hoon

doi:10.1016/j.memsci.2013.12.020

Cited by 13 publications

(14 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…On the other hand, the current density of the CSPPSU membranes is 15 times smaller than that of the Nafion212 membrane. The current density of the CSPPSU membranes was lower than those using other hydrocarbon membranes [40], indicating that the CSPPSU membrane has high durability against gas crossover. Figure 10 shows a plot of the voltage vs. time for MEAs using CSPPSU and Nafion212 membranes with an applied current of 1 A at a cell temperature of 80 °C and 100% RH.…”

Section: Fuel Cell Properties Using Csppsu Membranesmentioning

confidence: 85%

“…For example, several aromatic polymer ionomer membranes, such as polybenzimidazole (PBI) [6,7], sulfonated polyphenylene oxide (SPPO) [8], sulfonated polyimide [9][10][11], sulfonated polyethersulfone (SPES) [12,13], sulfonated polyphenylene (SPP) [14], sulfonated polyphenylene sulfone (SPPS) [15], sulfonated polysulfone (SPSU) [16][17][18][19][20][21], sulfonated polyetheretherketone (SPEEK) [22][23][24][25][26][27][28][29][30][31][32][33], and sulfonated polyphenylsulfone (SPPSU) [34][35][36][37][38][39][40][41][42][43][44][45][46][47][48][49], are being actively investigated. The rigid molecular chain structures of aromatic polymers provide high thermal stabilities.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Chemically Crosslinked Sulfonated Polyphenylsulfone (CSPPSU) Membranes for PEM Fuel Cells

2020

View full text Add to dashboard Cite

Sulfonated polyphenylsulfone (SPPSU) with a high ion exchange capacity (IEC) was synthesized using commercially available polyphenylsulfone (PPSU), and a large-area (16 × 18 cm 2 ) crosslinked sulfonated polyphenylsulfone (CSPPSU) membrane was prepared. In addition, we developed an activation process in which the membrane was treated with alkaline and acidic solutions to remove sulfur dioxide (SO 2 ), which forms as a byproduct during heat treatment. CSPPSU membranes obtained using this activation method had high thermal, mechanical and chemical stabilities. In I-V iR free studies for fuel cell evaluation, high performances similar to those using Nafion were obtained. In addition, from the hydrogen (H 2 ) gas crossover characteristics, the durability is much better than that of a Nafion212 membrane. In the studies evaluating the long-term stabilities by using a constant current method, a stability of 4000 h was obtained for the first time. These results indicate that the CSPPSU membrane obtained by using our activation method is promising as a polymer electrolyte membrane.

show abstract

Section: Fuel Cell Properties Using Csppsu Membranesmentioning

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Chemically Crosslinked Sulfonated Polyphenylsulfone (CSPPSU) Membranes for PEM Fuel Cells

2020

View full text Add to dashboard Cite

show abstract

“…During shutdown, the membranes will lose water and shrink, leading to mechanical stresses. This swelling and shrinking effects especially the parts of the membranes at the interface between the active and the inactive areas, because the active and inactive areas of the membrane respond differently (the inactive area is clamped between the gaskets) and at different times (the inactive area will respond with a delay) to changes in the operating conditions [59].…”

Section: Targeted Properties For Anion Exchange Membrane Water Electrmentioning

confidence: 99%

Overview: State-of-the Art Commercial Membranes for Anion Exchange Membrane Water Electrolysis

Henkensmeier

Najibah

Harms³

et al. 2020

Journal of Electrochemical Energy Conversion and Storage

Self Cite

219

205

View full text Add to dashboard Cite

One promising way to store and distribute large amounts of renewable energy is water electrolysis, coupled with transport of hydrogen in the gas grid and storage in tanks and caverns. The intermittent availability of renewal energy makes it difficult to integrate it with established alkaline water electrolysis technology. Proton exchange membrane (PEM) water electrolysis is promising, but limited by the necessity to use expensive platinum and iridium catalysts. The expected solution is anion exchange membrane (AEM) water electrolysis, which combines the use of cheap and abundant catalyst materials with the advantages of PEM water electrolysis, namely a low foot print, large operational capacity, and fast response to changing operating conditions. The key component for AEM water electrolysis is a cheap, stable, gas tight and highly hydroxide conductive polymeric AEM. Here we present target values and technical requirements for AEMs, discuss the chemical structures involved and the related degradation pathways, and give an overview over the most prominent and promising commercial AEMs (Fumatech Fumasep® FAA3, Tokuyama A201, Ionomr Aemion™, Dioxide materials Sustainion®, and membranes commercialized by Orion Polymer), and review their properties and performances of water electrolyzers using these membranes.

show abstract

“…To provide reliable performance to electrochemical devices such as fuel cells, redox flow batteries, and electrolyzers, outstanding mechanical properties of the membrane are required. In addition, high dimensional stability (low dimensional changes as a response to water absorption and desorption) is a crucial parameter for stable performance of these devices, to avoid crack formation, 53 edge break, 54 and membrane‐electrode delamination 55 . It is well known that Aquivion (EW = 830 g/eq) with a higher density of sulfonic acid groups has higher water swelling values than Nafion (EW = 1100 g/eq) 1,29 .…”

Section: Resultsmentioning

confidence: 99%

Nanostructure‐property relationship of two perfluorinated sulfonic acid ( PFSA ) membranes

Choi

Ikhsan

Jin

et al. 2022

Intl J of Energy Research

Self Cite

View full text Add to dashboard Cite

Summary The physicochemical properties of perfluorinated sulfonic acid (PFSA) polymers are closely correlated with their nanostructure. However, their real nano‐structural morphology is still controversial because it is difficult to observe their accurate morphology at the nanoscale. Moreover, studies on the nanostructures of the PFSA membranes have been mainly focused on the ionic domain. On this basis, here we describe the crystalline domain of two PFSA membranes as well as their ionic domain based on small‐angle X‐ray scattering results. Both ionic and crystalline domains showed significant alterations during hydration, and the different behaviors based on the side‐chain length of the two PFSA membranes are also described. The short side chain‐tethered PFSA membrane (higher ion exchange capacity (IEC)) showed a widespread ionic domain and lacking crystalline domain with their relatively temperature‐dependent tendency compared to the flexible long side chain‐tethered PFSA membrane (lower IEC). On this basis, the correlation between nanostructure and membrane properties is described from various perspectives.

show abstract

Locally confined membrane modification of sulfonated membranes for fuel cell application

Cited by 13 publications

References 34 publications

Chemically Crosslinked Sulfonated Polyphenylsulfone (CSPPSU) Membranes for PEM Fuel Cells

Chemically Crosslinked Sulfonated Polyphenylsulfone (CSPPSU) Membranes for PEM Fuel Cells

Overview: State-of-the Art Commercial Membranes for Anion Exchange Membrane Water Electrolysis

Nanostructure‐property relationship of two perfluorinated sulfonic acid ( PFSA ) membranes

Contact Info

Product

Resources

About