Special Issue "New Materials for Electrochemical Energy Storage Systems and Catalysis"

A special issue of Crystals (ISSN 2073-4352). This special issue belongs to the section "Materials for Energy Applications".

Deadline for manuscript submissions: closed (30 November 2023) | Viewed by 1395

Special Issue Editor

Centro Ricerche FIAT S.C.p.A., Strada Torino 50, 10043 Orbassano, Italy
Interests: electrochemistry; modelling of materials; li-ion batteries, catalysts
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Nowadays,  electrochemical energy storage and conversion devices are fundamental components of the green transition towards a more sustainable and environmentally friendly society independent from fossil fuels. Batteries, ultra-capacitors and fuel cells are more and more applied in the transport sector and in stationary energy production and storage and their diffusion will be further stimulated by the uneven geographical distribution of fossil fuels and by the needs of many countries to reach

On the other hand, catalysis has a wide range of high industrial impact applications, ranging from the production of polymers to the treatment of noxious emissions. In the energy field, the most evident use is in fuel cell electrodes but catalytic materials are also applied for the conversion of carbon dioxide or biogenic streams to synthetic fuels and for the electrochemical or photo assisted splitting of water to produce hydrogen.

Therefore, the aim of this Special Issue is to reveal insights into the materials used for electrochemical energy storage and conversion devices and for catalysis applied to the energy field. The intended scope of the selected publications is to shed light on the complex relationship between the crystal structure and morphology and the properties of the materials that determine the final performances of the devices where they are applied.

We invite interested authors to submit their original experimental, theoretical and review papers focusing on the subject for inclusion in this Special Issue.

Dr. Mauro Francesco Sgroi
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. Crystals is an international peer-reviewed open access monthly 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

  • electrochemical energy storage
  • batteries
  • super-capacitors
  • fuel cells
  • catalytic conversion of CO2
  • hydrogen production
  • synthetic fuels

Published Papers (2 papers)

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Research

17 pages, 11457 KiB  
Article
Pore-Scale Investigation of Mass Transport in Compressed Cathode Gas Diffusion Layer of Proton Exchange Membrane Fuel Cells
Crystals 2023, 13(10), 1430; https://doi.org/10.3390/cryst13101430 - 26 Sep 2023
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Abstract
Proton exchange membrane fuel cells (PEMFCs) are considered a promising energy source in the field of transport and distributed power generation. Fundamental research into their key components is needed to improve PEMFC performance and accelerate commercialization. Binder addition and compression induced by assembly [...] Read more.
Proton exchange membrane fuel cells (PEMFCs) are considered a promising energy source in the field of transport and distributed power generation. Fundamental research into their key components is needed to improve PEMFC performance and accelerate commercialization. Binder addition and compression induced by assembly pressure can significantly change the microstructure of the gas diffusion layer and affect mass transport. A two-dimensional multicomponent lattice Boltzmann (LB) model considering the cathode electrochemical reaction was developed, and a GDL was reconstructed numerically and considering a binder structure. The effects of the binder and compression on mass transport and electrochemical performance within the GDL were investigated. The results showed that an increase in binder volume fraction led to more chain-like structures and closed pores that were unfavorable for mass transport. Compression increased the mass transfer resistance of the GDL in the region under the rib, leading to a decrease in oxygen concentration and local current density. Full article
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17 pages, 21688 KiB  
Article
Synthesis of Silver Nanocubes@Cobalt Ferrite/Graphitic Carbon Nitride for Electrochemical Water Splitting
Crystals 2023, 13(9), 1342; https://doi.org/10.3390/cryst13091342 - 02 Sep 2023
Viewed by 709
Abstract
This study presents the synthesis of graphitic carbon nitride (g-C3N4) and its nanostructures with cobalt ferrite (CoFe2O4) and silver nanocubes (Ag) when using the combined pyrolysis of melamine and the polyol method. The resulted nanostructures [...] Read more.
This study presents the synthesis of graphitic carbon nitride (g-C3N4) and its nanostructures with cobalt ferrite (CoFe2O4) and silver nanocubes (Ag) when using the combined pyrolysis of melamine and the polyol method. The resulted nanostructures were tested as electrocatalysts for hydrogen and oxygen evolution reactions in alkaline media. It was found that Ag@CoFe2O4/g-C3N4 showed the highest current density and gave the lowest overpotential of −259 mV for HER to reach a current density of 10 mA cm−2 in a 1 M KOH. The overpotentials for reaching the current density of 10 mA·cm−2 for OER were 370.2 mV and 382.7 mV for Ag@CoFe2O4/g-C3N4 and CoFe2O4/g-C3N4, respectively. The above results demonstrated that CoFe2O4/g-C3N4 and Ag@CoFe2O4/g-C3N4 materials could act as bifunctional catalysts due to their notable performances and high stabilities toward hydrogen and oxygen evolution reactions (HER and OER). Total water splitting in practical applications is a promising alternative to noble-metal-based electrocatalysts. Full article
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