Conductivity and hydration of sulfonated polyethersulfone in the range 70–120°C: Effect of temperature and relative humidity cycling

Donnadio, Anna; Casciola, Mario; Vona, Maria Luisa Di; Tamilvanan, M.

doi:10.1016/j.jpowsour.2011.12.060

Cited by 26 publications

(19 citation statements)

References 29 publications

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“…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%

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

2020

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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.

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Section: Introductionmentioning

confidence: 99%

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

2020

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“…The WU at controlled temperature and RH was determined as described in Ref. 17. Specifically, the cell used to measure the WU has the same size and shape as the conductivity cell and differs from that mainly because the MEA holder is replaced by a glass container that hosts the membrane sample (≈0.5 g).…”

Section: Methodsmentioning

confidence: 99%

Promising Aquivion Composite Membranes based on Fluoroalkyl Zirconium Phosphate for Fuel Cell Applications

et al. 2014

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Layered zirconium phosphate (ZP) that bears fluorinated alkyl chains bonded covalently to the layers (ZPR) was used as a nanofiller in membranes based on a short-side-chain perfluorosulfonic acid (PFSA) to mechanically reinforce the PFSA hydrophobic component. Compared to the pristine PFSA, membranes with a ZPR loading up to 30 wt% show enhanced mechanical properties, and the largest improvement of elastic modulus (E) and yield stress (σY ) are observed for the 10 wt% ZPR membrane: ΔE/E up to 90% and ΔσY /σY up 70% at 70°C and 80% relative humidity (RH). In the RH range 50-95%, the in-plane conductivity of the composite membranes reaches 0.43 S cm(-1) for 10 wt% ZPR at 110°C and is on average 30% higher than the conductivity of the pristine PFSA. The 10 wt % ZPR membrane is as hydrated as the neat PFSA membrane at 50% RH but becomes progressively less hydrated with increasing RH both at 80 and 110°C. The fuel cell performance of this membrane, at 80°C and 30% RH, is better than that of the unmodified PFSA.

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“…In an attempt to address the important problem of methanol permeability in DMFC, Choi, et al [76] developed a composite GO/Nafion membrane with the rationale that GO would act as a barrier to fuel because of the higher tortuosity. GO is considered to enhance both [32] backbone and side chains of Nafion when it is incorporated to the ionic cluster, thus improving both mechanical and thermal properties. The authors claim that the compatibility between both components is guaranteed due to their strong interfacial attraction.…”

Section: Carbon Nanomaterialsmentioning

confidence: 99%

New approaches towards novel composite and multilayer membranes for intermediate temperature-polymer electrolyte fuel cells and direct methanol fuel cells

Branco

Sharma

Forte

et al. 2016

Journal of Power Sources

117

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Conductivity and hydration of sulfonated polyethersulfone in the range 70–120°C: Effect of temperature and relative humidity cycling

Cited by 26 publications

References 29 publications

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

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

Promising Aquivion Composite Membranes based on Fluoroalkyl Zirconium Phosphate for Fuel Cell Applications

New approaches towards novel composite and multilayer membranes for intermediate temperature-polymer electrolyte fuel cells and direct methanol fuel cells

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