Proton conducting sulfonated polysulfone and polyphenylsulfone multiblock copolymers with improved performances for fuel cell applications

Swaby, Sydonne; Ureña, Nieves; Pérez‐Prior, María Teresa; Río, Carmen del; Várez, A.; Sanchez, Jean‐Yves; Iojoiu, Cristina; Levenfeld, B.

doi:10.1016/j.jiec.2023.02.037

Cited by 6 publications

(8 citation statements)

References 44 publications

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“…A similar behavior is also obtained at 60 °C, and the WU ac % values are slightly higher than those obtained at 30 °C. In general, it can be said that WU ac % values are slightly lower than those of WU% determined for the same series of membranes, 23 in agreement with the information reported in the bibliography. 30,31 The series of membranes synthesized exhibit low water uptake, which favors the dimensional stability and consequently longer cycle life on the VRFB.…”

Section: Characterization Of the Membranessupporting

confidence: 90%

“…The chemical stability of the membranes can be associated with the high molecular weight of these materials, 35, 16, and 71 kDa, for SPES 50/50, SPES 60/40, and SPES 75/25, respectively. 23 SPES 60/40 showed lower molecular weight, and this fact could be used to explain its lower chemical stability. 22 3.3.…”

Section: Mechanical Propertiesmentioning

confidence: 97%

“…Multiblock copolymers based on PSU and PPSU blocks (PES) with three PSU/PPSU (in mol %) ratios (50/50, 60/40, and 75/25) were synthesized through a polycondensation in "one pot two-steps" from BP, DFDPS, and BPA monomers as it was previously reported by Swaby et al 23 (Figure S1). The variation obtained in the blocks of PSU and PPSU was controlled by the ratio of molecular weight of the blocks (1, 1.5, and 3 for PES 50/50 (5000/5000 g mol −1 ), PES 60/40 (7500/5000) g mol −1 , and PES 75/25 (7500/ 2500) g mol −1 , respectively (Scheme 1)).…”

Section: Synthesis Of Multiblock Copolymers and Preparation Of Membranesmentioning

confidence: 99%

“…The membranes were obtained by a casting procedure from a solution of SPES, as described in Section 2.2. The degree of sulfonation (DS) of the two blocks was obtained from both 1 H NMR analysis and ionic exchange capacity (IEC) values as described by Swaby et al 23 The DS of PSU varied from ∼0.8 to ∼2 (obtaining the highest value for the 60/40 copolymer), whereas a maximum value of DS around 0.8 for SPPSU was achieved for SPES 50/50. In the case of 60/40 and 75/25 copolymers, sulfonation occurred mainly in the block of PSU, leaving the PPSU portion almost unfunctionalized (DS PPSU around 0.1 for both copolymers) due to the high selectivity in the sulfonation reaction on PES 60/40 and 75/25 copolymers as has been described by Swaby et al 23 3.2.1.…”

Section: Characterization Of the Membranesmentioning

confidence: 99%

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Block Copolymer-Based Membranes for Vanadium Redox Flow Batteries: Synthesis, Characterization, and Performance

Swaby,

Monzón,

Ureña

et al. 2024

ACS Appl. Polym. Mater.

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Nonfluorinated polymers have been widely proposed to replace Nafion as raw materials for redox flow battery ionexchange membranes. Hereby, block copolymers based on polysulfone (PSU) and polyphenylsulfone (PPSU) are synthesized and employed as precursors of membranes for vanadium redox flow batteries. A series of copolymers with varying molar proportions of PSU (75/25, 60/40, 50/50 mol %) were prepared. The 60/40 and 75/25 copolymers exhibit concentrated sulfonic groups predominantly in the PSU unit, favoring the formation of hydrophobic and hydrophilic domains. The 50/50 copolymer presents a balanced degree of sulfonation between the two units, leading to a homogeneous distribution of sulfonic groups. An ex situ study of these materials comprising vanadium ion permeability and chemical and mechanical stability was performed. The best performance is achieved with 50/50 membranes, which exhibited performance comparable to commercial Nafion membranes. These results signify a promising breakthrough in the pursuit of high-performance, sustainable membranes for next-generation VRFBs.

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Section: Characterization Of the Membranessupporting

confidence: 90%

Section: Mechanical Propertiesmentioning

confidence: 97%

Section: Synthesis Of Multiblock Copolymers and Preparation Of Membranesmentioning

confidence: 99%

Section: Characterization Of the Membranesmentioning

confidence: 99%

See 2 more Smart Citations

Block Copolymer-Based Membranes for Vanadium Redox Flow Batteries: Synthesis, Characterization, and Performance

Swaby,

Monzón,

Ureña

et al. 2024

ACS Appl. Polym. Mater.

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“…Raw-PBSN lms with a thickness of 85 ~ 95 µm were thus obtained. In order to remove the unreacted monomers, the raw-PBSN lms were immersed in a water-acetone (1:1 mix ratio) solution for 12 h [11,19]. These lms were also immersed in an 80℃ peroxide (H 2 O 2 ) solution of 10% for 1 h to remove residual impurities [12,20].…”

Section: Preparation Of the Raw-pbsn And Spbsn Lmsmentioning

confidence: 99%

Preparation of sulfonated cross-linked films for proton exchange membranes (PEMs) through a curing process

jang,

Lee,

et al. 2023

Preprint

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Raw-poly(n-butyl acrylate (BA)-sodium styrene sulfonate (SS)-neopentyl glycol diacrylate (NPGDA)) (raw-PBSN) films were prepared through a curing process from various BA/SS/NPGDA mixtures (BSN mixture). The sulfonation of the raw-PBSN films was performed via a pretreatment process. As a result, light-brown sulfonated PBSN (SPBSN) films with a thickness of 80 ~ 95 µm were obtained. The ion exchange capacity (IEC) and proton conductivity (PC) of these specimens were improved with an increase in the content of SS within the SPBSN matrix. The SPBSN 25 wt%, SPBSN 30 wt% and SPBSN 35 wt% films containing corresponding SS content of 25 wt%, 30 wt% and 35 wt% had much higher IEC values compared to that of Nafion® 117. Specifically, the PC value of the SPBSN 35 wt% film was approximately 0.211 S/cm, nearly 22.6% higher than that of Nafion® 117 (0.172 S/cm) at a temperature of 80℃ and relative humidity (RH) of 100%. A fourier transform infrared spectroscopy (FT-IR) analysis was used to verify the sulfonation of the raw-PBSN films. A transmission electron microscope (TEM) analysis was conducted to investigate the micro-phase separated ionic cluster images of the SPBSN films.

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Preparation of Sulfonated Cross-Linked Films for Proton Exchange Membranes (PEMs) Through a Curing Process

Jang,

Lee,

et al. 2024

Korean J. Chem. Eng.

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Proton conducting sulfonated polysulfone and polyphenylsulfone multiblock copolymers with improved performances for fuel cell applications

Cited by 6 publications

References 44 publications

Block Copolymer-Based Membranes for Vanadium Redox Flow Batteries: Synthesis, Characterization, and Performance

Block Copolymer-Based Membranes for Vanadium Redox Flow Batteries: Synthesis, Characterization, and Performance

Preparation of sulfonated cross-linked films for proton exchange membranes (PEMs) through a curing process

Preparation of Sulfonated Cross-Linked Films for Proton Exchange Membranes (PEMs) Through a Curing Process

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