High-performance ultrathin perfluorinated sulfonic acid membranes with thermo-morphology control for a vanadium redox flow battery

Kim, Jongmin Q.; Rho, Yecheol; So, Soonyong; Choi, Siyoung Q.

doi:10.1039/d3ta04760a

Cited by 2 publications

(5 citation statements)

References 50 publications

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“…Kim et al prepared an ultrathin (∼30 nm) PFSA membrane (22 layers) with highly ordered hydrophilic domains via the LB assembly, which was deposited on a silicon wafer treated with octadecyltrichlorosilane (OTS) (Figure 7a). 70 3.3. LB Assembly for Inorganic Nanosheets.…”

Section: Lb Assembly For Organic Membranesmentioning

confidence: 99%

“…For example, perfluorinated sulfonic acid (PFSA) membranes are commonly used as proton exchange membranes (PEMs) because of their remarkable proton conductivity with high chemical and mechanical stability. Kim et al prepared an ultrathin (∼30 nm) PFSA membrane (22 layers) with highly ordered hydrophilic domains via the LB assembly, which was deposited on a silicon wafer treated with octadecyltrichlorosilane (OTS) (Figure a) …”

Section: Lbl Langmuir–blodgett Assemblymentioning

confidence: 99%

“…Schematic illustration of the Langmuir–Blodgett assembly methods. (a) Schematic diagram of the Langmuir–Blodgett assembly method for organic membranes to prepare well-ordered ultrathin PFSA ionomer membranes . Reproduced with permission from ref .…”

Section: Lbl Langmuir–blodgett Assemblymentioning

confidence: 99%

“…(a) Schematic diagram of the Langmuir–Blodgett assembly method for organic membranes to prepare well-ordered ultrathin PFSA ionomer membranes . Reproduced with permission from ref . Copyright 2023 Royal Society of Chemistry.…”

Section: Lbl Langmuir–blodgett Assemblymentioning

confidence: 99%

See 3 more Smart Citations

Layer-by-Layer Self-Assembly Strategies of Atomically Thin Two-Dimensional Nanomaterials: Principles, Methods, and Functional Applications

Cai,

Yang,

et al. 2024

ACS Appl. Nano Mater.

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Two-dimensional (2D) layered materials are an indispensable cornerstone of modern industry, which harnesses their strengths and creativity for energy, catalysis, sensors, and many other fields. Nowadays, materials science has transitioned from single-component substances to multicomponent composites, and how to efficiently construct multifunctional layered composites with controllable and stable structures has become a research hotspot. Among many available preparation techniques, the layer-by-layer (LbL) self-assembly technology is one of the most efficient strategies, which utilizes the noncovalent weak intermolecular forces to achieve stable binding of different components and thus exhibits extensive suitability compared with traditional methods. Precise molecular-level control of the structure and properties of LbL-assembled composites can be achieved through the selection of assembly units and the design of the assembly sequence. Benefiting from these merits, LbL-assembled laminated composites have been widely used in energy conversion and storage, optoelectronic and magnetic devices, drug delivery, sensors, separation membranes, and so on. In this review, we summarize the recent advances in the current mainstreams of LbL assembly technology, including the van der Waals (vdW) assembly, electrostatic assembly, Langmuir–Blodgett (LB) assembly, and hydrogen-bonded assembly. Moreover, a systematic review and perspective are provided not only on the applications of water electrolysis, lithium-ion batteries, optoelectronics, and magnetic devices but also on the existing challenges and future directions for LbL assembly.

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Section: Lb Assembly For Organic Membranesmentioning

confidence: 99%

Section: Lbl Langmuir–blodgett Assemblymentioning

confidence: 99%

Section: Lbl Langmuir–blodgett Assemblymentioning

confidence: 99%

Section: Lbl Langmuir–blodgett Assemblymentioning

confidence: 99%

See 2 more Smart Citations

Layer-by-Layer Self-Assembly Strategies of Atomically Thin Two-Dimensional Nanomaterials: Principles, Methods, and Functional Applications

Cai,

Yang,

et al. 2024

ACS Appl. Nano Mater.

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“…Proton-exchange membranes (PEMs) are important components of various electrochemical devices, such as fuel cells, redox-flow batteries, , water electrolyzers, electrochemical hydrogen compressors, reverse electrodialysis, etc. Sulfonic acid-functionalized polymers constitute the majority of PEMs and can be roughly categorized into four types, namely, phenyl sulfonic acids, alkyl sulfonic acids, perfluorophenyl sulfonic acids, and perfluoroalkyl sulfonic acids.…”

Section: Introductionmentioning

confidence: 99%

Robust Proton-Exchange Membranes Based on Perfluorosulfonic Acid-Functionalized Poly(phenyl-alkane) and Polyxanthene: Effects of Skeletal Structures on Membrane Properties

Xue,

Zheng,

Qian

et al. 2024

Macromolecules

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Perfluorosulfonic acid-functionalized aromatic polymers are attractive alternatives to commercial Nafion membranes; however, the heteroatoms (O, S, etc.) in traditional poly(arylene ether)s can initiate undesired chemical degradation by radical specie attacks. Herein, two robust proton-exchange membranes (PEMs), PA-BP-PFSA and PX-BP-PFSA, based on perfluorosulfonic acid-functionalized poly(phenyl-alkane) and polyxanthene, respectively, were prepared by copper-catalyzed postfunctionalization of poly(phenyl-alkane) and polyxanthene precursors containing bromine substituents. Molecular simulation results showed that polyxanthene had a higher rigidity than that of poly(phenyl-alkane). Hence, PX-BP-PFSA had higher Brunauer–Emmett–Teller surface area (124 versus 58 m2 g–1) and fractional free volume (0.303 versus 0.228), compared to that of PA-BP-PFSA. The ionic clusters in PA-BP-PFSA were obviously larger than those in PX-BP-PFSA and showed a higher water uptake and swelling ratio. PX-BP-PFSA exhibited higher conductivity than that of PA-BP-PFSA due to its better microporous nanochannels for ion transport. Both PEMs exhibited an excellent oxidative stability, with no noticeable changes in the thermogravimetric analysis and 1H and 19F NMR spectra after immersion in Fenton’s reagent for 2 h at 80 °C. This work presents a feasible approach to develop highly robust perfluorosulfonic acid-functionalized PEMs and provides meaningful insights into the structure–property relationship.

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High-performance ultrathin perfluorinated sulfonic acid membranes with thermo-morphology control for a vanadium redox flow battery

Abstract: We demonstrate the morphology control of pre-aligned hydrophilic channels of ultrathin (∼30 nm) perfluorinated sulfonic acid membranes leading to enhancement of ion-selectivity and vanadium redox flow battery cell performance.

Cited by 2 publications

References 50 publications

Layer-by-Layer Self-Assembly Strategies of Atomically Thin Two-Dimensional Nanomaterials: Principles, Methods, and Functional Applications

Layer-by-Layer Self-Assembly Strategies of Atomically Thin Two-Dimensional Nanomaterials: Principles, Methods, and Functional Applications

Robust Proton-Exchange Membranes Based on Perfluorosulfonic Acid-Functionalized Poly(phenyl-alkane) and Polyxanthene: Effects of Skeletal Structures on Membrane Properties

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