Pore-Size-Tuned Graphene Oxide Frameworks as Ion-Selective and Protective Layers on Hydrocarbon Membranes for Vanadium Redox-Flow Batteries

Kim, Soohyun; Choi, Jonghyun; Choi, Chang Koon; Heo, Jiyun; Kim, Dae Woo; Lee, Jang Yong; Hong, Young Taik; Jung, Hee Tae; Kim, Hee Tak

doi:10.1021/acs.nanolett.8b01429

Cited by 99 publications

(81 citation statements)

References 45 publications

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“…Well‐tuned channel size is also crucial to laminar membranes working as battery separators. It prevents the mixing of materials and electrolytes from positive and negative sides to sustain battery performance . In vanadium redox‐flow batteries (VRFB), an appropriate channel of 5.9 Å selectively permeates protons (<2.5 Å, main charge carriers) over VO 2+ (>6.0 Å), which minimizes the energy loss in cycling operations.…”

Section: Selective Performance and Future Designsmentioning

confidence: 99%

2D Laminar Membranes for Selective Water and Ion Transport

Kang

Xia

Wang

et al. 2019

Adv Funct Materials

243

148

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energy storage and conversion devices, [26][27][28] as outlined in recent reviews (Figure 1, left). [29] Behind these applications lie a fundamental question: how water and ion transport are controlled in the laminar structure to obtain desired selectivity. A comprehensive summary of structure-transport relation is thereby imperative to understand and optimize membrane selective performance, but is so far lacking. In such context, our review aims to fill this gap by discussing: 1) how 2D materials with specific physicochemical features are assembled into laminar membranes; 2) most importantly, how membrane structure, and its response to external impacts, can tune mass transport (herein, water and ions); 3) how these transport mechanisms translate into selectivity in applications, and into future design of high-performance laminar membranes. Unsolved problems and emerging challenges around these topics are then concluded. We note that the knowledge summarized here can also, at least partly, assist the understanding of the selective gas, liquid, and micromolecule transport through laminar membranes, which are gaining considerable attention as well. [30][31][32] Transition Metal Carbides and/or Nitrides (MXene): MXene nanosheets are etched and delaminated from parent bulk MAX to M n+1 X n T x (e.g., Ti 3 C 2 T x ), and have thus several atom sublayers. [39] While M and X are early transition metal

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Section: Selective Performance and Future Designsmentioning

confidence: 99%

2D Laminar Membranes for Selective Water and Ion Transport

Kang

Xia

Wang

et al. 2019

Adv Funct Materials

243

148

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“…22,23 In addition, the chemical stability of these membranes is not good enough for long cycle life in practice. 24 To overcome this problem, semi interpenetrating polymer network (semi-IPN) has been developed. It is a facile and efficient approach to increase the stability of IEMs without losing their proton conductivity.…”

Section: Introductionmentioning

confidence: 99%

Improved chemical stability and proton selectivity of semi‐interpenetrating polymer network amphoteric membrane for vanadium redox flow battery application

Xia

Zhang

et al. 2020

J of Applied Polymer Sci

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In this work, semiinterpenetrating polymer network (semi-IPN), consisting of sulfonated poly (arylene ether sulfone) (SPAES) and crosslinked vinyl imidazole grafted polysulfone (VMPSU), is prepared and characterized. FTIR, EDS, and solubility test indicate the successful preparation of amphoteric membranes. The semi-IPN amphoteric membranes exhibit better stability than pure SPAES membrane, as demonstrated by thermogravimetric analysis and ex situ immersion testing results. More importantly, it is shown that the amphoteric membrane can effectively hinder vanadium ion crossover through the membrane, which is attributed to the semi-IPN structure and Donnan exclusion. As expected, the amphoteric membrane containing 20% VMPSU exhibits the highest proton selectivity (6.86 × 10 4 S min cm −3), comparing to pristine SPAES (1.90 × 10 4 S min cm −3) as well as Nafion117 (1.31 × 10 4 S min cm −3).

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“…The tailored SPVDF-co-HFP membranes exhibited lesser IEC of 0.95% at 0.75 wt% of PEI-RGO probably due to the strong acid-base pair formation between the amine and sulfonic acid groups confine the dissociable H + ions. 10,25 3.2.6 | Proton conductivity Table 2 depicts the proton conductivity of bare and tailored mem-…”

Section: Water Uptake Swelling Ratio and Iecmentioning

confidence: 99%

“…9 Kim et al optimized the pore size of ion-selective GO framework (GOF) via tuning the interlayer spacing (d) between the sandwiched layers by cross-linking and developed GOF/sulfonated poly(arylene ether sulfone) (SPAES) membranes with high energy efficiency and low vanadium-ion permeability. 10 Highly stable styrene divinylbenzene co-polymer membrane incorporated with sulfonated graphene oxide (SGO) additive is developed by Rajput et al and found that low vanadium-ion permeability and adequate proton conductivity. 11 The blend membranes are also developed using acid-base pair interaction with the aim of improvement in proton conductivity and reduction in vanadium-ion permeability as well as swelling ratio.…”

Section: Introductionmentioning

confidence: 99%

Sulfonated poly (vinylidene fluoride‐co‐hexafluoropropylene) nanocomposite membranes with high selectivity, stability, and vanadium‐ion barrier for vanadium redox flow batteries

Divya

Rana

Saraswathi

et al. 2020

Polymers for Advanced Techs

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Polyethyleneimine-functionalized reduced graphene oxide (PEI-RGO)-embedded sulfonated poly (vinylidene fluoride-co-hexafluoropropylene) (SPVDF-co-HFP) acid-base composite membranes are fabricated by solution casting method for vanadium redox flow battery (VRFB) applications. The denser and crumbled morphology revealed by FESEM images and EDX results indicates the successful synthesis of PEI-RGO nanosheets. The interfacial acid-base pairs formed between PEI-RGO and SPVDF-co-HFP matrix of composite membranes result in improvement of ion exchange capacity, water uptake, proton conductivity, as well as effective control in swelling ratio and vanadium-ion permeability. In addition, the dispersing ability of PEI-RGO in the SPVDF-co-HFP matrix improved the thermal and mechanical stability of the composite membranes. Homogeneous dispersion of PEI-RGO nanosheets at the SPVDF-co-HFP surface is revealed by the FESEM images of the composite membranes, and their presence is confirmed by EDX results. The SPVDF-co-HFP membrane with 0.75 wt% PEI-RGO exhibited the highest proton conductivity of 5.69 × 10 −3 Scm −1 at 25 C, membrane selectivity of 25.52 × 10 −4 Scm −3 min, and lowest vanadium-ion permeability of 2.23 × 10 −8 cm 2 min −1. Overall results suggested that the SPVDF-co-HFP-0.75 nanocomposite membranes are found to be a suitable alternative for commercially costly Nafion in VRFB applications.

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Pore-Size-Tuned Graphene Oxide Frameworks as Ion-Selective and Protective Layers on Hydrocarbon Membranes for Vanadium Redox-Flow Batteries

Cited by 99 publications

References 45 publications

2D Laminar Membranes for Selective Water and Ion Transport

2D Laminar Membranes for Selective Water and Ion Transport

Improved chemical stability and proton selectivity of semi‐interpenetrating polymer network amphoteric membrane for vanadium redox flow battery application

Sulfonated poly (vinylidene fluoride‐co‐hexafluoropropylene) nanocomposite membranes with high selectivity, stability, and vanadium‐ion barrier for vanadium redox flow batteries

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