Branched sulfonated polyimide membrane with ionic cross-linking for vanadium redox flow battery application

Pan, Yang; Long, Jun; Xuan, Sensen; Wang, Yanlin; Zhang, Yaping; Li, Jinchao; Zhang, Hongping

doi:10.1016/j.jpowsour.2019.226993

Cited by 63 publications

(21 citation statements)

References 46 publications

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“…Wang, Xi, et al included benzimidazole groups into the backbone of sulfonated polyimides by ao ne-step polycondensation method in 2018, affording acid-base sulfonated polyimides (SPIX in Figure 4, Xd enotes the degree of sulfonation (DS)). [46] It was found that the increase of DS (accompanied by the decrease of ionic-crosslinking extent) led to the rise of IEC,water uptake,swelling ratio,and proton conductivity,b ut the H + /VO 2+ selectivity experienced an increase first and then ad ecrease,d emonstrating that the trade-off between ionic conductivity and selectivity was also encountered by the ionic-crosslinking membranes proposed here.Soon after,another acid-base sulfonated polyimide was prepared by introducing benzimidazole groups as side-chains (c-FbSPI in Figure 4), [47] with the modification by 1,3,5-tris(2trifluoromethyl-4-aminophenoxy)benzene.T he integrating effect of the hydrophobic -CF 3 group,t he ionic-crosslinking structure,a nd the Donnan exclusion effect endowed the membrane with low vanadium permeability.M eanwhile,t he specific 3D branched structure together with the proton transport channels formed at the acid-base interfacial zone promoted the proton transport.…”

Section: Creation Of Acid-base Interactionsmentioning

confidence: 99%

A Chemistry and Microstructure Perspective on Ion‐Conducting Membranes for Redox Flow Batteries

et al. 2021

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Redox flow batteries (RFBs) are among the most promising grid‐scale energy storage technologies. However, the development of RFBs with high round‐trip efficiency, high rate capability, and long cycle life for practical applications is highly restricted by the lack of appropriate ion‐conducting membranes. Promising RFB membranes should separate positive and negative species completely and conduct balancing ions smoothly. Specific systems must meet additional requirements, such as high chemical stability in corrosive electrolytes, good resistance to organic solvents in nonaqueous systems, and excellent mechanical strength and flexibility. These rigorous requirements put high demands on the membrane design, essentially the chemistry and microstructure associated with ion transport channels. In this Review, we summarize the design rationale of recently reported RFB membranes at the molecular level, with an emphasis on new chemistry, novel microstructures, and innovative fabrication strategies. Future challenges and potential research opportunities within this field are also discussed.

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Section: Creation Of Acid-base Interactionsmentioning

confidence: 99%

A Chemistry and Microstructure Perspective on Ion‐Conducting Membranes for Redox Flow Batteries

et al. 2021

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“…6,7 However, high cost and low vanadium ion resistance hinder their widespread commercial application. 8,9 Due to the low cost, good mechanical properties, and high ion selectivity, nonfluorinated membranes such as sulfonated poly (ether ether ketone) (SPEEK), [10][11][12][13] sulfonated poly (arylene ether sulfone) (SPAES), [14][15][16][17] sulfonated polyimide (SPI) 18,19 , and polybenzimidazole 20,21 have attracted a lot of attention in the VRFB applications. However, these materials are difficult to apply in practice because it is hard to keep high conductivity and good dimension stability simultaneously.…”

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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“…For RFBs, the ideal membrane ought to own several merits, including low cost, outstanding chemical and mechanical stability, high ionic conductivity, and low active species crossover. 14,15 Nowadays, Nafion as an outstanding representative of perfluorinated sulfonic acid membranes is widely adopted in RFB application as a consequence of its superior chemical stability and extremely high ionic conduction. [16][17][18][19] Nevertheless, complex production and high cost limit its practical application.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Nafion series membranes on the performance of iron‐chromium redox flow battery

Sun

Zhang

2019

Int J Energy Res

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Summary To boost the performance of the iron‐chromium redox flow battery (ICRFB), opting an appropriate proton exchange membrane (PEM) as the core component of ICRFB is of great importance. For the purpose, in this paper, various widely adopted commercial Nafion membranes with a different thickness of 50 μm (Nafion 212, N212), 126 μm (N115), and 178 μm (N117) are chosen for the sake of evaluating the influence of membrane thickness on the ICRFB single‐cell performance. Physicochemical properties, electrolyte utilization, cell efficiency, long‐term cycling stability, and the self‐discharge process of ICRFBs based on a series of Nafion membranes are contrasted comprehensively. The cycling test of ICRFBs is carried out under the current density range of 40 to 120 mA/cm2 for the charge‐discharge process. As a result of the good equilibrium of membrane resistance and electro‐active species permeability, Nafion 212 membrane exhibits the highest electrolyte utilization and energy efficiency during the operation, accompanied by the lowest overpotential. In the final part, the selection of Nafion membrane thickness was optimized on the basis of single‐cell performance and the overall cost of the system.

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Branched sulfonated polyimide membrane with ionic cross-linking for vanadium redox flow battery application

Cited by 63 publications

References 46 publications

A Chemistry and Microstructure Perspective on Ion‐Conducting Membranes for Redox Flow Batteries

A Chemistry and Microstructure Perspective on Ion‐Conducting Membranes for Redox Flow Batteries

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

Investigation of Nafion series membranes on the performance of iron‐chromium redox flow battery

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