SPEEK Membrane of Ultrahigh Stability Enhanced by Functionalized Carbon Nanotubes for Vanadium Redox Flow Battery

Ding, Mei; Ling, Xiao; Yuan, Du; Cheng, Yuanhang; Wu, Chun; Chao, Zi‐Sheng; Sun, Lidong; Yan, Chuanwei; Jia, Chuankun

doi:10.3389/fchem.2018.00286

Cited by 57 publications

(44 citation statements)

References 35 publications

(43 reference statements)

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“…[78] Various inorganic fillers such as nanoparticles (SiO 2 , [ [81] SiC, [40e] AlOOH, [82] and TPA [38b] ), nanotubes (ZrO 2 NT, [33b] CNT, [67,69,70] and Ce 2 Zr 2 O 7 NT [33c] ), nanosheets (GO, [71,72,83] SBA-15, [78] and g-C 3 N 4 [65,66] ) and microporous silicate (Engelhard titanosilicate-10 [68] and AMH-3 [63] ) have been used to modify the hydrocarbon-based membranes. Inorganic fillers are normally distributed in hydrophilic regions and can interact with sulfonic acid groups.…”

Section: Wwwadvsustainsyscommentioning

confidence: 99%

“…That is due to the hydrogen bonding network between SO 3 H groups of SPAEK and O-containing groups of ZrO 2 nanotube by creating hydrated water transfer channels and accelerating proton transport via the Grotthuss mechanism. [67] In addition, the functional groups increase the number of ion channels and form interconnective ion channels. The SPAEK/ZrO 2 NT (1.5%) composite membrane showed low self-discharge rate and ultrahigh self-discharge time of 595 h at 0.8 V, which was much higher than that of previously reported membranes for VRFBs.…”

Section: Wwwadvsustainsyscommentioning

confidence: 99%

“…The SPAEK/ZrO 2 NT (1.5%) composite membrane showed low self-discharge rate and ultrahigh self-discharge time of 595 h at 0.8 V, which was much higher than that of previously reported membranes for VRFBs. [67] Compared to acidic groups, the interfacial interaction between NH 2 groups onto CNTs Adv. The functional groups including carboxylic groups, hydroxyl groups and amino-functionalized groups in CNTs significantly affect the performance of the composite membranes via verifying the microstructure of membrane.…”

Section: Wwwadvsustainsyscommentioning

confidence: 99%

“…Reproduced with permission [67]. c) Illustration showing the interaction between MWCNTs-OH and SPEEK polymer matrix.…”

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The Structure–Activity Relationship in Membranes for Vanadium Redox Flow Batteries

Jiang

Xiang

et al. 2019

Advanced Sustainable Systems

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IntroductionWith the rapid increase of consumption of fossil fuels and the consequent environment pollution, there is an urgent need for the development and effective utilization of renewable energy sources like wind, solar, biomass, etc. However, these renewable energy sources are intermittent in nature, leading to the conflict between the seasonal and unstable electricity generation and requirement of the continuous and stable power supply for the end application. Thereby, energy storage Vanadium redox flow batteries (VRFBs) are regarded as one of the most promising electrochemical technologies for grid-connected renewable energy storage systems. The performance of VRFBs, however, strongly depends on the membrane, one of the key components of VRFBs with critical dual functions of promotion of diffusion of active species (H + , H 3 O + , SO 4 2−, or SO 4 H − ) and inhibition of crossover of vanadium ions. This is intrinsically related to the microstructure of membranes. For example, large and connected ionic clusters or pores in membranes are favorable for the ion transfer, but detrimental to the ion selectivity. While small and isolated hydrophilic ion clusters or pores suppress the water uptake and ion transfer, the decreased swelling ratio would enhance chemical stability of membrane. Thus, comprehensive strategies are required to realize the optimal balance between the ion selectivity, proton conductivity, and chemical stability. This review focuses on the effects of microstructure of membranes on the ion transfer and the chemical stability, including introduction of the rigid groups, electron-withdrawing groups, and hydrophobic backbones, are reviewed. The prospect of the development of membranes with high ion selectivity and high-performance VRFBs is discussed.

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Section: Wwwadvsustainsyscommentioning

confidence: 99%

Section: Wwwadvsustainsyscommentioning

confidence: 99%

Section: Wwwadvsustainsyscommentioning

confidence: 99%

“…Reproduced with permission [67]. c) Illustration showing the interaction between MWCNTs-OH and SPEEK polymer matrix.…”

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The Structure–Activity Relationship in Membranes for Vanadium Redox Flow Batteries

Jiang

Xiang

et al. 2019

Advanced Sustainable Systems

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“…Proton exchange membrane is a key component in the flow battery, which performs as a separator to isolate the positive and negative electrolyte compartments, and meanwhile to conduct protons (Jia et al, 2012 ; Yu et al, 2016 ). An ideal membrane is expected to exhibit high proton conductivity, good chemical and mechanical stability, accurate ion selectivity, and low-cost fabrication approach (Jia et al, 2010 ; Ding et al, 2018 ; Yuan et al, 2018 ). To date, the commercial Nafion membranes have been widely used in VRBs, because of its good proton conductivity, remarkable chemical and mechanical stability (Li et al, 2014a ; Dai et al, 2017 ).…”

Section: Introductionmentioning

confidence: 99%

Ion Selectivity and Stability Enhancement of SPEEK/Lignin Membrane for Vanadium Redox Flow Battery: The Degree of Sulfonation Effect

Lou

et al. 2018

Front. Chem.

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A membrane of high ion selectivity, high stability, and low cost is desirable for vanadium redox flow battery (VRB). In this study, a composite membrane is formed by blending the sulfonated poly (ether ether ketone) with lignin (SPEEK/lignin), and optimized by tailoring the degree of sulfonation. The incorporation of lignin into the SPEEK matrix provides more proton transport pathway and meanwhile adjusts the water channel to repulse vanadium ions. The VRB cells assembled with the composite membranes exhibit high coulombic efficiency (~99.27%) and impressive energy efficiency (~82.75%). The cells maintain a discharge capacity of ~95% after 100 cycles and ~85% after 200 cycles at 120 mA cm−2, much higher than the commercial Nafion 212. The SPEEK/lignin composite membranes are promising for application in VRB system.

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Designing Ion‐Selective Membranes for Vanadium Redox Flow Batteries

Amiri

Khosravi

Ejeian

et al. 2021

Adv Materials Technologies

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With the increase in the world's population and industrialization, world energy consumption experienced an ascending trend in the last years, [1] which is anticipated to continue in the future. As such, the sustainable supply of energy is critical, relying on both renewable and unrenewable sources. However, an essential aspect in this context is that generally, the rates of generation and consumption of energy do not coincide with each other because of the need for peak shaving or load leveling in power grids or due to the intermittent nature of such ever-developing renewable sources like solar or wind energies. Accordingly, to overcome such temporal mismatches, the adaptation of efficient and reliable timeshifting technologies, i.e., energy storage systems (ESSs), must be pursued. Such solutions also make it possible to develop distributed energy generation technologies as well as increase efficiency. Among various developed or emerging ESSs, [2,3] electrochemical batteries show longer discharge time at the rated power (energy) in larger-scale power system. [4] Redox flow batteries (RFBs) are a well-known type of electrochemical rechargeable batteries. Anodic and/or cathodic redox-active materials are commonly dissolved in their respective electrolyte and flow from external reservoirs on electrodes where they undergo redox reactions during charge/discharge processes. These batteries have shown some advantages such as rapid response time, flexible installation, easy modularization, scalability, and short construction cycles, were made them suitable candidates for large-scale electrical energy storage purposes. [7] Among all various RFBs, Vanadium redox flow batteries (VRFBs) are the most widely studied, promising, and wellestablished technology due to their attractive characteristics for large-scale ESS. The idea of using vanadium redox couples goes back to 1933 and 1954 when two patents of P.A Pissoort (France) and Walter Kango (Germany) were established. [8] However, the first VRFBs were developed in the 1980s by the Skyllas-Kazacos group. Since then, the history of VRFBs is significantly tied with different efforts for the development of other flow or redox flow-based batteries, as schematically presented in Figure 1a. Motivated by promising as well as proven merits, different VRFBs demonstrations with the scale from tens of kW to MW have been successfully tested, and it is believed that the It is predicted that the future of energy will mainly rely on batteries such as vanadium redox flow batteries (VRFBs), and its related research has already attracted significant attention. The primary function of a membrane in VRFBs is to control proton transport between the half-cells and to hinder admixing the anolyte and catholyte at the same time. However, to develop a low-cost and energy-efficient VRFB, other membrane roles are crucial. The combination of a highly stable backbone of polytetrafluoroethylene with hydrophilic perfluorinated-vinyl-polyether side chains equipped with sulfonic acid groups (Nafion membranes)...

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SPEEK Membrane of Ultrahigh Stability Enhanced by Functionalized Carbon Nanotubes for Vanadium Redox Flow Battery

Cited by 57 publications

References 35 publications

The Structure–Activity Relationship in Membranes for Vanadium Redox Flow Batteries

The Structure–Activity Relationship in Membranes for Vanadium Redox Flow Batteries

Ion Selectivity and Stability Enhancement of SPEEK/Lignin Membrane for Vanadium Redox Flow Battery: The Degree of Sulfonation Effect

Designing Ion‐Selective Membranes for Vanadium Redox Flow Batteries

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