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Flow Systems for Electrical Energy Conversion
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Flow Systems for Electrical Energy Conversion

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "I: Energy Fundamentals and Conversion".

Deadline for manuscript submissions: closed (10 October 2023) | Viewed by 5687

Special Issue Editor

Dr. Anatoly Evgenievich Antipov

E-Mail Website
Guest Editor
Head of the Laboratory "Electroactive Materials and Chemical Power Sources", Mendeleev University of Chemical Technology of Russia, Moscow, Russia
Interests: mass and charge transport in electrochemical systems; kinetics of electrochemical reactions, electrical energy storage (EES), concentration polarization; redox flow batteries characterization (current–voltage characteristics, chronopotentiommetry, electrochemical impedance spectroscopy, mass transfer characteristics, etc.); analytical and experimental techniques development for EES analysis, flow batteries, bromine flow batteries, hydrogen-bromate hybrid systems

Special Issue Information

Dear Colleagues,

The potential of alternative energy sources (wind, solar, etc) can be fully exploited only if efficient, safe, and reliable electrical energy storage (EES) systems are provided. Flow batteries, fuel cells and hybrid flow systems concepts provide great opportunity to create an effective EES system with the electrolyte and electroactive materials stored externally, that enables the separation of the power and energy requirements.

The aim of this Special Issue is broadening of novel functional and design concepts, materials, and processes in the scope of electrical energy conversion and storage devices via their both experimental and theoretical study.

In this Special Issue, original research articles and broad reviews are welcome. The scope of the Special Issue includes but is not limited to:

  • New experimental approaches in energy conversion and storage flow systems (flow batteries, fuel cells and hybrid systems)
  • Novel computational and theoretical studies of the mass and charge transport processes in energy conversion and storage flow systems (flow batteries, fuel cells and hybrid systems)
  • New materials for energy conversion and storage flow systems, methods of their characterization and analysis of flow batteries, fuel cells and hybrid systems.

Dr. Anatoly Evgenievich Antipov
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 submissions that pass pre-check are 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. Energies is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). 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

  • energy conversion
  • energy storage
  • flow batteries
  • fuel cells
  • hybrid energy systems

Published Papers (3 papers)

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Research

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13 pages, 2868 KiB  
Article
Ruddlesden–Popper Oxides LaSrM11−xM2xO4±δ (M1, M2—Fe, Co, Ni) Synthesized by the Spray-Pyrolysis Method as Promising Electrocatalysts for Oxygen Evolution Reaction
by Pavel A. Sinitsyn, Vitaly V. Kuznetsov, Elena A. Filatova and Sergey V. Levchenko
Energies 2022, 15(21), 8315; https://doi.org/10.3390/en15218315 - 07 Nov 2022
Cited by 3 | Viewed by 1714
Abstract
Ruddlesden–Popper (RP) transition-metal oxide phases with the general formula An+1BnO3n+1 are versatile functional materials that can accommodate a large variety of compositions without compromising structural stability. Substitutions at the A and B sites allow for [...] Read more.
Ruddlesden–Popper (RP) transition-metal oxide phases with the general formula An+1BnO3n+1 are versatile functional materials that can accommodate a large variety of compositions without compromising structural stability. Substitutions at the A and B sites allow for the precise control of functional properties of these materials. This opens wide possibilities for rational design. In particular, some of these materials were demonstrated to be efficient and stable catalysts for electrochemical oxygen evolution reaction (OER)—one of the key processes in fuel cells and water electrolyzers. In this work, RP phases LaSrM11−xM2xO4±δ (M1, M2—Fe, Co, Ni) with unreported stoichiometry are prepared from aqueous solutions of metal nitrates using the ultrasonic spray-pyrolysis (USP) technique. We found that the phase purity of samples synthesized by USP is higher as compared to samples prepared by solid-state synthesis or by precipitation from aqueous solutions followed by calcination, used in previous studies of RP oxides. LaSrFe0.5Ni0.5O4–δ (LSNF) oxides are found to be very active in OER in alkaline solutions, with overpotential 0.27 V at j = 0.1 A cm–2 of visible electrode surface in a 5 M solution of KOH. This overpotential is on par with the noble-metal-based OER electrocatalysts. Moreover, the catalytic performance of LSNF in OER is found to be stable over the electrolysis time even in the strongly alkaline solution. These two factors let us conduct the water splitting process in more concentrated electrolytes decreasing the energy cost of hydrogen production by water electrolysis. Full article
(This article belongs to the Special Issue Flow Systems for Electrical Energy Conversion)
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9 pages, 5327 KiB  
Communication
Successful Charge–Discharge Experiments of Anthraquinone-Bromate Flow Battery: First Report
by Lilia Abunaeva, Natalia Kartashova, Kirill Karpenko, Dmitry Chikin, Darya Verakso, Pavel Loktionov, Roman Pichugov, Anatoly Vereshchagin, Mikhail Petrov and Anatoly Antipov
Energies 2022, 15(21), 7967; https://doi.org/10.3390/en15217967 - 27 Oct 2022
Viewed by 1586
Abstract
The proposed anthraquinone-bromate cell combines the advantages of anthraquinone-bromine redox flow batteries and novel hybrid hydrogen-bromate flow batteries. The anthraquinone-2,7-disulfonic acid is of interest as a promising organic negolyte due its high solubility, rapid kinetics of electrode reactions and suitable redox potentials combined [...] Read more.
The proposed anthraquinone-bromate cell combines the advantages of anthraquinone-bromine redox flow batteries and novel hybrid hydrogen-bromate flow batteries. The anthraquinone-2,7-disulfonic acid is of interest as a promising organic negolyte due its high solubility, rapid kinetics of electrode reactions and suitable redox potentials combined with a high chemical stability during redox reactions. Lithium or sodium bromates as posolytes provide an anomalously high discharge current density of order ~A cm−2 due to a novel autocatalytic mechanism. Combining these two systems, we developed a single cell of novel anthraquinone-bromate flow battery, which showed a power density of 1.08 W cm−2, energy density of 16.1 W h L−1 and energy efficiency of 72% after 10 charge–discharge cycles. Full article
(This article belongs to the Special Issue Flow Systems for Electrical Energy Conversion)
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Review

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20 pages, 2317 KiB  
Review
Halogen Hybrid Flow Batteries Advances for Stationary Chemical Power Sources Technologies
by Anatoly Antipov, Roman Pichugov, Lilia Abunaeva, Shengfu Tong, Mikhail Petrov, Alla Pustovalova, Ivan Speshilov, Natalia Kartashova, Pavel Loktionov, Alexander Modestov and Artem Glazkov
Energies 2022, 15(19), 7397; https://doi.org/10.3390/en15197397 - 09 Oct 2022
Cited by 4 | Viewed by 1852
Abstract
This review aims to highlight the current advances in hybrid redox flow battery (HRFB) technology, encompassing one of the best combinations of efficiency, cost and flexibility due to its module construction, which offers independent scaling of power density and energy capacity. This work [...] Read more.
This review aims to highlight the current advances in hybrid redox flow battery (HRFB) technology, encompassing one of the best combinations of efficiency, cost and flexibility due to its module construction, which offers independent scaling of power density and energy capacity. This work emphasizes the interest of the scientific community both in (i) studying the properties and principles of HRFB operation in order to improve commonly proposed systems, and in (ii) the development of energy storage devices with new reagent types or RFB concepts. The data provided enhances the reader to conclude whether novel concepts in halogen oxidizers utilization could help to overcome the problem of insufficient power and energy densities of common RFB. Full article
(This article belongs to the Special Issue Flow Systems for Electrical Energy Conversion)
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