Test Cell for Membrane Electrode Assembly of the Vanadium Redox Flow Battery

Petrov, Mikhail M.; Pichugov, Roman; Loktionov, Pavel; Antipov, A. E.; Usenko, Andrey A.; Конев, Д. В.; Vorotyntsev,; Минцев, В. Б.

doi:10.1134/s0012501620030021

Cited by 5 publications

(9 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, it turned out that the maximum capacity for the studied membranes exceeded the capacity for the reference sample, which was attributed to polarization losses due to the lower area resistance of the samples. Despite the fact that additional variation of the applied current densities and selection of the preferable conditions could level the capacity utilization for all samples, the effective current density for the Nafion 117 should be lower than 60 mA/cm 2 , while in general, membrane design is targeted to the higher current density implementation to increase the energy density of the VFB [37] …”

Section: Resultsmentioning

confidence: 99%

“…Despite the fact that additional variation of the applied current densities and selection of the preferable conditions could level the capacity utilization for all samples, the effective current density for the Nafion 117 should be lower than 60 mA/cm 2 , while in general, membrane design is targeted to the higher current density implementation to increase the energy density of the VFB. [37] Further analysis of polymerization curves at 50 % State of Charge (SoC) showed both materials exhibited maximum power densities of 505 and 570 mW/cm 2 for PTFE-sPS-1 and PTFE-sPS-2, respectively, which were 60 mW/cm 2 higher than for Nafion 117. Linearization of initial section of the polarization curves gave the cell resistance for PTFE-sPS-1, PTFE-sPS-2 and Nafion 117 equal to 0.236 Ω/cm 2 , 0.197 Ω/cm 2 and 0.26 Ω/cm 2 , respectively.…”

Section: Vrb Testingmentioning

confidence: 99%

“…[36] Membrane tests in the VRB prototype were performed at a housedesigned cell with 4 cm 2 active area with 3 layers of Sigracet SGL 39AA carbon paper and Serpentine FF channel structure. [37,38] The electrolyte contained 10 ml of 1 M vanadium ions in 4 M sulfuric acid and was pumped with 60 ml/min flow rate. EIS data from V (IV) solutions in both compartments was measured before the test procedure as a control.…”

Section: Membrane Characterizationmentioning

confidence: 99%

See 2 more Smart Citations

A Composite Membrane Based on Sulfonated Polystyrene Implanted in a Stretched PTFE Film for Vanadium Flow Batteries

et al. 2020

View full text Add to dashboard Cite

The quality of ion-selective membranes determines the efficiency of Vanadium Flow Batteries (VFBs), and alternatives to expensive Nafion™ materials are actively being searched for. One of the membrane architecture approaches is to imitate the Nafion™ structure with two separate phases: a conductive sulfonated polymer and an inner matrix. We introduce a new composite material based on sulfonated styrene polymerized inside the pores of a stretched PTFE matrix. Variation of polystyrene content and a sulfonation degree allowed to obtain membranes with IEC from to 0.96 to 1.84 mmol/g. Balanced vanadium permeability (ca. 5.5 • 10 À 6 cm 2 /min) and proton conductivity (ca. 50 mS/cm) were achieved for the material with 21-23 % polystyrene content and a sulfonation degree up to 94 %. Membranes showed stable cycling with 81 % energy efficiency in a single-cell VFB. This work contributes to the existing knowledge of Nafion alternatives by providing a cheap and scalable method of membrane production.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Vrb Testingmentioning

confidence: 99%

Section: Membrane Characterizationmentioning

confidence: 99%

See 1 more Smart Citation

A Composite Membrane Based on Sulfonated Polystyrene Implanted in a Stretched PTFE Film for Vanadium Flow Batteries

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Series of carbon paper electrodes (one of them with Pt/C catalyst layer) is inserted in electrode gaskets. After these gaskets graphite current collectors are followed [concept of redox flow battery (RFB) cell with graphite foil current collectors described in authors’ previous works] [52–55] . Then flow field frames for electrolyte distribution, sealing gaskets, and metal end plates with compression fittings.…”

Section: Methodsmentioning

confidence: 99%

Two‐Membrane Acid‐Base Flow Battery with Hydrogen Electrodes for Neutralization‐to‐Electrical Energy Conversion

et al. 2021

View full text Add to dashboard Cite

Acid‐base flow batteries (ABFB) are a promising and environmentally benign class of flow batteries that utilize neutralization energy. Among the other flow batteries, ABFBs stand out with low cost and high solubility of the electrolytes and the possibility to harvest neutralization energy of acidic and alkaline wastewaters. However, the main ABFB issues, such as low power caused by discharge current limitation and low energy density, are limiting the possibility of their implementation. In this work, a novel two‐membrane ABFB with two hydrogen electrodes was developed to overcome main ABFB issues. The proposed concept demonstrated high power density up to 6.1 mW cm−2 at 13 mA cm−2. It was shown that battery performance was greatly limited by negative electrode overvoltage. Analysis of the voltage losses allowed to estimate main power losses and highlight the possible ways to its minimization.

show abstract

“…The study of new material for BPs is still an actual question. Earlier our group proposed a new concept of fast-prototyping of RFB MEA individual cells 21,22 or stacks 23 utilizing a series of laser-cut graphite foil (GF) sheets. BPs made of GF with laser-cut channels allow fasting prototyping RFB with various flow field designs to optimize battery efficiency.…”

Section: Introductionmentioning

confidence: 99%

Fluoropolymer impregnated graphite foil as a bipolar plates of vanadium flow battery

Loktionov

Kartashova

Конев

et al. 2021

Intl J of Energy Research

View full text Add to dashboard Cite

Summary Renewable energy in recent years plays an increasingly important role in the energy industry. Therefore, the problem of inventing efficient and affordable energy storage devices is of current importance. Vanadium redox flow battery stands out between a wide range of various chemical sources of electric energy. Discovering the way for optimizing the price of energy storage is one of the most important questions of the mentioned battery. New graphite‐polymer composite materials study shows that they may become a replacement for commonly used brittle graphite. The current article presents the study of graphite foil (or flexible graphite) filling with a copolymer of tetrafluoroethylene and vinylidene fluoride F‐42 properties. The article uses an implementation approach of putting the fluoropolymer into the pores of graphite foil, which shows a slight decrease in electrical conductivity, while a significant increase in its electrochemical stability in comparison with untreated graphite foil. Testing results of such material as current collectors (or bipolar plates) in a single membrane‐electrode assembly of vanadium redox flow battery cell show peak value of discharge power density of 843 mW/cm2, energy efficiency of 78%‐79% during cycling at 200 mA/cm2 allowing us to assume the possibility of its successful application in redox flow battery stacks.

show abstract

Test Cell for Membrane Electrode Assembly of the Vanadium Redox Flow Battery

Cited by 5 publications

References 15 publications

A Composite Membrane Based on Sulfonated Polystyrene Implanted in a Stretched PTFE Film for Vanadium Flow Batteries

A Composite Membrane Based on Sulfonated Polystyrene Implanted in a Stretched PTFE Film for Vanadium Flow Batteries

Two‐Membrane Acid‐Base Flow Battery with Hydrogen Electrodes for Neutralization‐to‐Electrical Energy Conversion

Fluoropolymer impregnated graphite foil as a bipolar plates of vanadium flow battery

Contact Info

Product

Resources

About