Special Issue "Vanadium Redox Flow Battery and Its Applications"

A special issue of Batteries (ISSN 2313-0105).

Deadline for manuscript submissions: 30 September 2018

Special Issue Editor

Guest Editor
Prof. Dr. Maria Skyllas-Kazacos

School of Chemical Engineering, University of New South Wales (UNSW Sydney) NSW, Australia, 2052
Website | E-Mail
Interests: vanadium redox flow battery; flow batteries; electrode materials; membranes; cell design; sensors; control; modelling; simulation

Special Issue Information

Dear Colleagues,

It has now been more than 30 years since the first patent on the Vanadium Redox Flow Battery (VFB) was granted to our group at University of New South Wales (UNSW Sydney) and we are thrilled to see the increasing interest that has led to the extensive research, development, field trials and now commercial production of the VFB around the world. VFB can now be regarded as a mature energy storage technology, but, as with all mature technologies, ongoing research is helping to improve performance and reduce cost for broader implementation in a range of energy storage applications. In this first Special Issue dedicated to the Vanadium Redox Flow Battery, we hope to collect contributions from all the research groups and companies currently engaged in VFB research, development and manufacture in order to describe the current state-of-the-art across the full range of flow battery topics to serve as an important reference to the energy storage industry and to flow battery researchers engaged in this rapidly growing field.

Prof. Dr. Maria Skyllas-Kazacos
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All papers will be peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Batteries is an international peer-reviewed open access quarterly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) is waived for well-prepared manuscripts submitted to this issue. Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • vanadium electrolytes
  • electrolyte production methods
  • electrode materials
  • membranes
  • sensors
  • stack design and modelling
  • cell materials
  • simulation
  • advanced control
  • cost analysis
  • manufacturing
  • quality control
  • field studies
  • system design
  • performance evaluation

Published Papers (2 papers)

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Research

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Open AccessArticle The Effect of Sulfuric Acid Concentration on the Physical and Electrochemical Properties of Vanadyl Solutions
Received: 30 May 2018 / Revised: 19 July 2018 / Accepted: 23 July 2018 / Published: 1 September 2018
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Abstract
The effects of sulfuric acid concentration in VO2+ solutions were investigated via electrochemical methods and electron paramagnetic resonance. The viscosity of solutions containing 0.01 M VOSO4 in 0.1–7.0 M H2SO4 was measured. Diffusion coefficients were independently measured via
[...] Read more.
The effects of sulfuric acid concentration in VO2+ solutions were investigated via electrochemical methods and electron paramagnetic resonance. The viscosity of solutions containing 0.01 M VOSO4 in 0.1–7.0 M H2SO4 was measured. Diffusion coefficients were independently measured via electrochemical methods and electron paramagnetic resonance (EPR), with excellent agreement between the techniques employed and literature values. Analysis of cyclic voltammograms suggest the oxidation of VO2+ to VO2+ is quasi-reversible at high H2SO4 concentrations (>5 mol/L), and approaching irreversible at lower H2SO4 concentrations. Further analysis reveals a likely electrochemical/chemical (EC) mechanism where the H2SO4 facilitates the electrochemical step but hinders the chemical step. Fundamental insights of VO2+/H2SO4 solutions can lead to a more comprehensive understanding of the concentration effects in electrolyte solutions. Full article
(This article belongs to the Special Issue Vanadium Redox Flow Battery and Its Applications)
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Review

Jump to: Research

Open AccessReview Electrocatalysis at Electrodes for Vanadium Redox Flow Batteries
Received: 30 July 2018 / Revised: 20 August 2018 / Accepted: 23 August 2018 / Published: 13 September 2018
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Abstract
Flow batteries (also: redox batteries or redox flow batteries RFB) are briefly introduced as systems for conversion and storage of electrical energy into chemical energy and back. Their place in the wide range of systems and processes for energy conversion and storage is
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Flow batteries (also: redox batteries or redox flow batteries RFB) are briefly introduced as systems for conversion and storage of electrical energy into chemical energy and back. Their place in the wide range of systems and processes for energy conversion and storage is outlined. Acceleration of electrochemical charge transfer for vanadium-based redox systems desired for improved performance efficiency of these systems is reviewed in detail; relevant data pertaining to other redox systems are added when possibly meriting attention. An attempt is made to separate effects simply caused by enlarged electrochemically active surface area and true (specific) electrocatalytic activity. Because this requires proper definition of the experimental setup and careful examination of experimental results, electrochemical methods employed in the reviewed studies are described first. Full article
(This article belongs to the Special Issue Vanadium Redox Flow Battery and Its Applications)
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Planned Papers

The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.

Title: Degradation phenomena of bismuth-modified felt electrodes in VRFB studied by EIS and XPS

Authors: Jonathan Schneider, Eduard Bulczak, Igor Derr, Konstantin Schutjajew, Abdulmonem Fetyan, Christina Roth
Affiliations: Institute for Chemistry and Biochemistry, FU Berlin, Takustr. 3, D-14195 Berlin
Abstract: The performance of all-V redox flow batteries (VRFB) will decrease when they are exposed to dynamic electrochemical cycling, but also when they are in prolonged contact with the acidic electrolyte. These phenomena are especially severe at the negative side, where the parasitic hydrogen evolution reaction (HER) will be increasingly favored over the reduction of V(III) with ongoing degradation of the carbon felt electrode. Bismuth, either added to the electrolyte or deposited onto the felt, has been reported to suppress the HER and therefore to enhance the kinetics of the V(II)/V(III) redox reaction. This study is the first to investigate degradation effects on bismuth-modified electrodes in the negative half-cell of a VRFB. By means of a simple impregnation method, a commercially available carbon felt was decorated with Bi2O3, which is supposedly present as Bi(0) under the working conditions at the negative side. Modified and unmodified felts were electrochemically characterized using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) in a three-electrode setup. This was done before and after the electrodes were subjected to electrochemical cycling for more than two weeks in a battery test bench. The fiber composition of the felt electrodes close to the surface was probed using X-ray photoelectron spectroscopy (XPS) and correlated with the electrochemical results. Based on these findings, the effect of bismuth on the degradation of carbon felt electrodes in the negative half cell of VRFB is discussed.
Keywords: Vanadium, redox flow battery, degradation, bismuth, electrochemical impedance spectroscopy

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