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Crystals
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Advanced Research on Electrode Materials for Supercapacitors
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Advanced Research on Electrode Materials for Supercapacitors

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

Deadline for manuscript submissions: closed (1 March 2024) | Viewed by 5386

Special Issue Editors

Dr. Vanaraj Ramkumar

E-Mail Website
Guest Editor
Materials Chemistry Laboratory, School of Chemical Engineering, Yeungnam University, Gyeonsan 38541, Republic of Korea
Interests: functional polymers; supercapacitor; bio-film applications
Special Issues, Collections and Topics in MDPI journals
Dr. Gopiraman Mayakrishnan

E-Mail Website
Guest Editor
Division of Molecules and Polymers, Institute for Fiber Engineering (IFES), Interdisciplinary Cluster for Cutting Edge Research (ICCER), Shinshu University, Tokida 3-15-1, Ueda, Nagano 386-8567, Japan
Interests: nanocatalysis; nanofibers; carbon materials; electrochemistry; green synthesis; nanocomposites; biomedical
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Supercapacitor materials prepared with amazing properties, such as unique structure, high surface area and well-defined porosity, are much needed to produce high power and energy density. A uniform crystal structure and formation of the targeted material can enhance the specific capacitance of a material. Molecular packing and alignment are very important in terms of a material’s charging–discharging capacity. Hence, the materials’ characterization involves the description of a molecular crystal structure that is very important to the supercapacitor.  Several types of materials are being used to achieve high-performance supercapacitors, such as MOFs, metal oxides, carbon and nano-composite materials. The XRD is the most significant tool to explain the crystal structure of the above. High-performance materials with simple preparation are challenging but much needed for recent supercapacitor applications. Recently, there has been growing interest in the potential use of symmetric and asymmetric supercapacitors for an enhancement in the specific capacitance of prepared materials. The aim of this Special Issue is to produce a discussion on the latest advances in the crystal structure role in advanced research on electrode materials for high-performance supercapacitors.

Topics of interest include, but are not limited to, the following:

High-performance supercapacitor;

Carbon and its composites materials;

Metal-oxide materials;

Organic materials for energy production;

Crystal structure of supercapacitor;

Novel electrode materials;

Molecular crystal structure of energy application.

In this regard, we are contacting you regarding the journal Crystals (ISSN 2073-4352, IF 2.670), which is currently running a Special Issue entitled "Advanced Research on Electrode Materials for Supercapacitors". I am serving as a Guest Editor for this issue. I believe that you could make an excellent contribution based on your expertise in this field.

Dr. Vanaraj Ramkumar
Dr. Gopiraman Mayakrishnan
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. 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.

Published Papers (2 papers)

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Research

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13 pages, 5310 KiB  
Article
Utilizing High-Capacity Spinel-Structured High-Entropy Oxide (CrMnFeCoCu)3O4 as a Graphite Alternative in Lithium-Ion Batteries
by Lenka Oroszová, Dávid Csík, Gabriela Baranová, Gábor Bortel, Róbert Džunda, László Temleitner, Mária Hagarová, Ben Breitung and Karel Saksl
Crystals 2024, 14(3), 218; https://doi.org/10.3390/cryst14030218 - 24 Feb 2024
Viewed by 1514
Abstract
In the realm of advanced anode materials for lithium-ion batteries, this study explores the electrochemical performance of a high-entropy oxide (HEO) with a unique spinel structure. The equiatomic composition of CrMnFeCoCu was synthesized and subjected to a comprehensive materials characterization process, including X-ray [...] Read more.
In the realm of advanced anode materials for lithium-ion batteries, this study explores the electrochemical performance of a high-entropy oxide (HEO) with a unique spinel structure. The equiatomic composition of CrMnFeCoCu was synthesized and subjected to a comprehensive materials characterization process, including X-ray diffraction and microscopy techniques. The multicomponent alloy exhibited a multiphase structure, comprising two face-centered cubic (FCC) phases and an oxide phase. Upon oxidation, the material transformed into a spinel oxide with a minor presence of CuO. The resulting high-entropy oxide demonstrated excellent electrochemical behavior when utilized as an anode material. Cyclic voltammetry revealed distinctive reduction peaks attributed to cation reduction and solid electrolyte interphase (SEI) layer formation, while subsequent cycles showcased high reversibility. Electrochemical impedance spectroscopy indicated a decrease in charge transfer resistance during cycling, emphasizing the remarkable electrochemical performance. Galvanostatic charge/discharge tests displayed characteristic voltage profiles, with an initial irreversible capacity attributed to SEI layer formation. The HEO exhibited promising rate capability, surpassing commercial graphite at higher current densities. The battery achieved 80% (275 mAh g−1) of its initial stable capacity at a current density of 500 mA g−1 by the 312th cycle. Post-mortem analysis revealed structural amorphization during cycling, contributing to the observed electrochemical behavior. This research highlights the potential of HEOs as advanced anode materials for lithium-ion batteries, combining unique structural features with favorable electrochemical properties. Full article
(This article belongs to the Special Issue Advanced Research on Electrode Materials for Supercapacitors)
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Review

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28 pages, 13022 KiB  
Review
An Overview of Active Electrode Materials for the Efficient High-Performance Supercapacitor Application
by Bharathi Arumugam, Gopiraman Mayakrishnan, Suresh Kumar Subburayan Manickavasagam, Seong Cheol Kim and Ramkumar Vanaraj
Crystals 2023, 13(7), 1118; https://doi.org/10.3390/cryst13071118 - 18 Jul 2023
Cited by 10 | Viewed by 3588
Abstract
Recent energy research focuses on the efficiency enhancement of supercapacitor devices for multipurpose applications. Several materials have been used as electrode materials to achieve the maximum specific capacitance. The present review article concludes with three different types of materials recently used to enhance [...] Read more.
Recent energy research focuses on the efficiency enhancement of supercapacitor devices for multipurpose applications. Several materials have been used as electrode materials to achieve the maximum specific capacitance. The present review article concludes with three different types of materials recently used to enhance the efficiency of supercapacitors. The first type involves carbon-based materials for storage and supercapacitor applications. The carbon materials could be obtained naturally and synthesized manually based on need. The additional advantage of carbon material is these materials can be obtained from natural sources. The second type discusses the recent advances in metal oxide materials for high-performance supercapacitors. The metal oxide materials are involved in different types of attachment through the bi-tri metallic bonding, which enhances the specific capacitance. The third type involves recently advanced materials for high energy and power density application. The power and energy density of the materials is enhanced by the surface modification of the materials. In recent days, the MXene and nanocomposite materials seem to be an appropriate material to increase the power and energy density of the device. The modification and surface treatment of respective materials could enhance the specific capacitance of the material. Full article
(This article belongs to the Special Issue Advanced Research on Electrode Materials for Supercapacitors)
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