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Energies
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Recent Advances in Electrochemical Energy Storage and Conversion Systems
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Recent Advances in Electrochemical Energy Storage and Conversion Systems

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "A5: Hydrogen Energy".

Deadline for manuscript submissions: closed (31 January 2022) | Viewed by 8371

Special Issue Editors

Dr. Senthilkumar Sirugaloor Thangavel

E-Mail Website1 Website2
Guest Editor
IMDEA Energy, 28935 Móstoles Madrid, Spain
Interests: supercapacitors; seawater batteries; hybrid electrolyte (air) batteries; Zn-ion batteries; hybrid ion batteries; redox flow batteries
Dr. Arunchander Asokan

E-Mail Website
Guest Editor
Faculty of Mechanical Engineering, Technion-Israel Institute of Technology, Haifa 32000, Israel
Interests: fuel cells; Zn-air batteries; metal–CO2 cells; water electrolysers
Dr. Ganesh Kumar Veerasubramani

E-Mail Website1 Website2
Guest Editor
Department of Chemical Engineering and Bio Engineering, Hanyang University, Seoul, Korea
Interests: energy storage materials; metal-ion batteries; supercapacitors

Special Issue Information

Dear Colleagues,

The development of renewable energy production and the usage of electric vehicles and electronic gadgets are increasing rapidly due to the fast modernisation of the world. The operation of electric vehicles and electronic devices are based on power sources—for example, rechargeable batteries and fuel cells. However, fast-charging, high-energy density batteries and high-power output fuel cells are the long-term expectations of our society due to their practical and widespread applications. Moreover, a large-scale energy storage/conversion system is an integral requirement for the widespread deployment of renewable energy technologies due to their intermittent nature. Intense studies have been devoted to exploring excellent and efficient energy storage and conversion materials, electrolytes, electrode engineering and cell engineering/design to advance electrochemical energy storage/conversion systems, including Li-ion batteries, Na-ion batteries, K-ion batteries, supercapacitors, redox flow batteries, multivalent batteries, hybrid/dual ion batteries, metal–air batteries, fuel cells, and so on, for the above applications, with respect to the desire for them.

Electrochemical energy storage/conversion systems represent a broad topic, and their research and development are critically associated with a multidisciplinary approach. Thus, this Special Issue aims to motivate researchers who have recently been exploring the area of electrochemical energy storage/conversion systems.

We invite authors to submit their original research articles, review articles and perspective articles pertaining to electrochemical energy storage and conversion devices.

Dr. Senthilkumar Sirugaloor Thangavel
Dr. Arunchander Asokan
Dr. Ganesh Kumar Veerasubramani
Guest Editors

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

  • metal-ion/air batteries
  • energy storage/conversion materials
  • dual/hybrid ion batteries
  • redox flow batteries
  • electrocatalysts
  • electrolyte for energy storage and conversion systems
  • electrode architecture for energy storage and conversion systems
  • flexible energy storage and conversion systems
  • miniature energy storage and conversion systems
  • supercapacitors

Published Papers (3 papers)

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Research

17 pages, 2957 KiB  
Article
Including Heat Balance When Designing the Energy System of Fuel Cell-Powered AUVs
by Ariel Chiche, Göran Lindbergh, Ivan Stenius and Carina Lagergren
Energies 2021, 14(16), 4920; https://0-doi-org.brum.beds.ac.uk/10.3390/en14164920 - 11 Aug 2021
Viewed by 1897
Abstract
Fuel cell-powered Autonomous Underwater Vehicles (AUVs) represent a growing area of research as fuel cells can increase their endurance. Fuel cells consume hydrogen and oxygen to generate electricity. Typically, the fuel cell generates as much heat as electrical energy, and heat management becomes [...] Read more.
Fuel cell-powered Autonomous Underwater Vehicles (AUVs) represent a growing area of research as fuel cells can increase their endurance. Fuel cells consume hydrogen and oxygen to generate electricity. Typically, the fuel cell generates as much heat as electrical energy, and heat management becomes a crucial parameter when designing AUVs. For underwater applications, there is a need to store both gases and several types of storage units with different characteristics exist which have impacts on the energy density and heat behavior. This study aims at including the heat properties of the storage units in the design process of fuel cell-powered AUVs. A heat balance over the energy system of an AUV is calculated for each combination of hydrogen and oxygen storage units. In addition, a multi-criteria decision-making analysis is conducted, considering the calculated total heat, the specific energy, the energy density and the volumetric mass of each combination of storage units as criteria, enabling a comparison and ranking them using two objective criteria weighting methods. Results show that the fuel cell is the major contributor to the heat balance, and that the combinations of liquid oxygen with liquid or compressed hydrogen can be relevant and suitable for underwater applications. Full article
(This article belongs to the Special Issue Recent Advances in Electrochemical Energy Storage and Conversion Systems)
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9 pages, 3865 KiB  
Article
Structural, Optical, and Magnetic Properties of Cobalt-Doped ZnAl2O4 Nanosheets Prepared by Hydrothermal Synthesis
by Thirumala Rao Gurugubelli, Bathula Babu and Kisoo Yoo
Energies 2021, 14(10), 2869; https://0-doi-org.brum.beds.ac.uk/10.3390/en14102869 - 16 May 2021
Cited by 17 | Viewed by 2418
Abstract
Nanomaterials with collective optical and magnetic properties are called smart or functional materials and have promising applications in many fields of science and technology. Undoped and Co-doped ZnAl2O4 were prepared using a co-precipitation-assisted hydrothermal method. A systematic investigation was carried [...] Read more.
Nanomaterials with collective optical and magnetic properties are called smart or functional materials and have promising applications in many fields of science and technology. Undoped and Co-doped ZnAl2O4 were prepared using a co-precipitation-assisted hydrothermal method. A systematic investigation was carried out to understand the effects of the Co concentration on the crystalline phase, morphology, and optical and magnetic properties of Co-doped ZnAl2O4. X-ray diffraction confirmed the cubic spinel structure with the Fd3m space group, and there was no impurity phase. X-ray photoelectron spectroscopy of Co-doped ZnAl2O4 confirmed the existence of Zn, Al and O, and the Co in the optimized sample of ZAO-Co-3 confirmed the oxidation state of cobalt as Co2+. Transmission electron microscopy of pure and Co-doped ZnAl2O4 revealed micro-hexagons and nanosheets, respectively. The optical absorption results showed that the bandgap of ZnAl2O4 decreased with increasing Co concentration. The hysteresis loop of Co-doped ZnAl2O4 revealed clear ferromagnetic behavior at room temperature. The as-prepared materials are suitable for energy storage applications, such as in supercapacitors and fuel cells. This work aims to focus on the effect of cobalt ions in different concentrations on structural, optical and magnetic properties. Full article
(This article belongs to the Special Issue Recent Advances in Electrochemical Energy Storage and Conversion Systems)
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14 pages, 1510 KiB  
Article
Cobalt Nanoparticle-Embedded Nitrogen-Doped Carbon Catalyst Derived from a Solid-State Metal-Organic Framework Complex for OER and HER Electrocatalysis
by Shaik Gouse Peera, Ravindranadh Koutavarapu, Chao Liu, Gaddam Rajeshkhanna, Arunchander Asokan and Ch. Venkata Reddy
Energies 2021, 14(5), 1320; https://0-doi-org.brum.beds.ac.uk/10.3390/en14051320 - 01 Mar 2021
Cited by 15 | Viewed by 3114
Abstract
Electrochemical water splitting is considered a promising way of producing hydrogen and oxygen for various electrochemical energy devices. An efficient single, bi-functional electrocatalyst that can perform hydrogen evolution reactions (HERs) and oxygen evolution reactions (OERs) is highly essential. In this work, Co@NC core-shell [...] Read more.
Electrochemical water splitting is considered a promising way of producing hydrogen and oxygen for various electrochemical energy devices. An efficient single, bi-functional electrocatalyst that can perform hydrogen evolution reactions (HERs) and oxygen evolution reactions (OERs) is highly essential. In this work, Co@NC core-shell nanoparticles were synthesized via a simple, eco-friendly, solid-state synthesis process, using cobalt nitrate and with pyrazole as the N and C source. The morphological analysis of the resulting Co@NC nanoparticles was performed with a scanning and transmission electron microscope, which showed Co nanoparticles as the core and the pyrolysis of pyrazole organic ligand N-doped carbon derived shell structure. The unique Co@NC nanostructures had excellent redox sites for electrocatalysis, wherein the N-doped carbon shell exhibited superior electronic conductivity in the Co@NC catalyst. The resulting Co@NC nanocatalyst showed considerable HER and OER activity in an alkaline medium. The Co@NC catalyst exhibited HERs overpotentials of 243 and 170 mV at 10 mA∙cm−2 on glassy carbon and Ni foam electrodes, respectively, whereas OERs were exhibited overpotentials of 450 and 452 mV at a current density of 10 and 50 mA∙cm−2 on glassy carbon electrode and Ni foam, respectively. Moreover, the Co@NC catalyst also showed admirable durability for OERs in an alkaline medium. Full article
(This article belongs to the Special Issue Recent Advances in Electrochemical Energy Storage and Conversion Systems)
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