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

Jiang, Shengjuan; Lu, Shanfu; Xiang, Yan; Jiang, San Ping

doi:10.1002/adsu.201900020

Cited by 25 publications

(17 citation statements)

References 232 publications

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“…In most studies on IEMs for VRFBs, selectivity is expressed as the ratio of ionic conductivity to vanadium permeability (i.e.,

κ / P_{V}

) 67 . Within the framework developed in the present study, the selectivity of CEMs used in VRFBs,

α_{H / V}

, is obtained via:

α_{H / V} = \frac{C_{H}^{m} D_{H}^{m}}{{4 C}_{V}^{m} D_{V}^{m}} = \frac{κRT}{4 F^{2} P_{V} C_{V}^{s}}

The factor of four in the denominator of Equation comes from the valence of VO 2+ .…”

Section: Resultsmentioning

confidence: 99%

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Reformulating the permselectivity‐conductivity tradeoff relation in ion‐exchange membranes

Kamcev

2021

Journal of Polymer Science

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Polymer membranes used in separation applications exhibit a tradeoff between permeability and selectivity. That is, membranes that are highly permeable tend to have low selectivity and vice versa. For ion‐exchange membranes used in applications such as electrodialysis and reverse electrodialysis, this tradeoff is expressed in terms of membrane permselectivity (i.e., ability to selectively permeate counter‐ions over co‐ions) and ionic conductivity (i.e., ability to transport ions in the presence of an electric field). The use of membrane permselectivity and ionic conductivity to illustrate a tradeoff between counter‐ion throughput and counter‐ion/co‐ion selectivity in ion‐exchange membranes complicates the analysis since permselectivity depends on the properties of the external solution and ionic conductivity depends on the transport of all mobile ions within a membrane. Furthermore, the use of these parameters restricts the analysis to ion‐exchange membranes used in applications in which counter‐ion/co‐ion selectivity is required. In this study, the permselectivity‐conductivity tradeoff relation for ion‐exchange membranes is reformulated in terms of ion concentrations and diffusion coefficients in the membrane. The reformulated framework enables a direct comparison between counter‐ion throughput and counter‐ion/co‐ion selectivity and is general. The generalizability of the reformulated tradeoff relation is demonstrated for cation‐exchange membranes used in vanadium redox flow batteries.

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“…In most studies on IEMs for VRFBs, selectivity is expressed as the ratio of ionic conductivity to vanadium permeability (i.e.,

κ / P_{V}

) 67 . Within the framework developed in the present study, the selectivity of CEMs used in VRFBs,

α_{H / V}

, is obtained via:

α_{H / V} = \frac{C_{H}^{m} D_{H}^{m}}{{4 C}_{V}^{m} D_{V}^{m}} = \frac{κRT}{4 F^{2} P_{V} C_{V}^{s}}

The factor of four in the denominator of Equation comes from the valence of VO 2+ .…”

Section: Resultsmentioning

confidence: 99%

“…In most studies on IEMs for VRFBs, selectivity is expressed as the ratio of ionic conductivity to vanadium permeability (i.e., κ=P V ). 67 Within the framework developed in the present study, the selectivity of CEMs used in VRFBs, α H=V , is obtained via:…”

Section: Permeability-selectivity Tradeoff In Iems For Vanadium Redox...mentioning

confidence: 99%

Reformulating the permselectivity‐conductivity tradeoff relation in ion‐exchange membranes

Kamcev

2021

Journal of Polymer Science

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“…Nevertheless, it is worth mentioning that non‐perfluorinated membranes (AEM and CEM) and porous membranes with high ion selectivity and chemical stability are still the hotspots of the future development of ICRFB membrane materials [64] . Modifications of perfluorinated membranes, including inorganic‐organic hybrid, polymer blending, and amphoteric membranes need to be further investigated to ameliorate the ionic selectivity, as the developing trend of membranes for vanadium‐based RFB system [4,73] …”

Section: Research Status Of Key Components In Icrfbmentioning

confidence: 99%

Review of the Development of First‐Generation Redox Flow Batteries: Iron‐Chromium System

2021

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The iron-chromium redox flow battery (ICRFB) is considered the first true RFB and utilizes low-cost, abundant iron and chromium chlorides as redox-active materials, making it one of the most cost-effective energy storage systems. ICRFBs were pioneered and studied extensively by NASA and Mitsui in Japan in the 1970-1980s, and extensive studies on ICRFBs have been carried out over the past few decades. In addition, ICRFB is considered to be one of the most promising directions for costeffective and large-scale energy storage applications, as its cost can theoretically be lower than that of zinc-bromine and all-vanadium RFBs, giving it the potential for large-scale promotion. With the resolution of problems such as hydrogen evolution and electrolyte intermixing, the ICRFB technology is moving out of the laboratory and striving for greater power and more stable industrialization requirements. This Review summarizes the history, development, and research status of key components (carbon-based electrode, electrolyte, and membranes) in the ICRFB system, aiming to give a brief guide to researchers who are involved in the related subject.

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“…On the other hand, it has been reported that the presence of hydrophilic particles like SiO 2 may also increase water uptake of the membrane, which enhances proton conductivity. [ 95 ] The FTIR‐ATR spectra of homogeneous perfluorosulfonic ionomer/silica composite membrane synthesized by Zeng et al. [ 96 ] showed a strong peak at 1105 cm –1 attributed to the Si–O–Si asymmetric stretching vibration, formed as a result of a condensation reaction between SiOEt/SiOH groups, but no peak at ≈940 cm –1 ascribed to Si–OH group.…”

Section: Polymer–particle Mixed Matrix Membranesmentioning

confidence: 99%

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

Cited by 25 publications

References 232 publications

Reformulating the permselectivity‐conductivity tradeoff relation in ion‐exchange membranes

Reformulating the permselectivity‐conductivity tradeoff relation in ion‐exchange membranes

Review of the Development of First‐Generation Redox Flow Batteries: Iron‐Chromium System

Designing Ion‐Selective Membranes for Vanadium Redox Flow Batteries

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