Search for Articles:
Title / Keyword
Author / Affiliation / Email
Journal
Article Type
 
 
Advanced Search
 
Section
Special Issue
Volume
Issue
Number
Page
 
4.2
2.4
Journals
Crystals
Special Issues
Hybrid Materials for Energy Storage and Conversion
share announcement

Hybrid Materials for Energy Storage and Conversion

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

Deadline for manuscript submissions: 10 June 2025 | Viewed by 2200

Special Issue Editors

Dr. I. Neelakanta Reddy

E-Mail Website
Guest Editor
School of Mechanical Engineering, Yeungnam University, Gyeongsan 38541, Republic of Korea
Interests: photocatalysts; photoelectrochemical water splitting; graphitic carbon nitride; kinetics; nickel; electrochemical impedance spectroscopy; photoelectrodes; photoelectrochemical activity
Special Issues, Collections and Topics in MDPI journals
Dr. Moorthy Dhanasekar

E-Mail Website
Guest Editor
Department of Physics, Sri Ramaswamy Memorial Institute of Science and Technology, Ramapuram, Chennai 600089, India
Interests: thin-film solar cell; dye degradation; photocatalysts; photoelectrochemical water splitting; photoelectrodes; photoelectrochemical activity
Dr. Mallikarjuna Koduru

E-Mail Website
Guest Editor
Department of Physics, Marri Laxman Reddy Institute of Technology and Management, Dundigal, Hyderabad Telangana 500043, India
Interests: band engineering; surface modification; composite materials; electrode materials; supercapacitors

Special Issue Information

Dear Colleagues,

Currently, the eco-friendly production and storage of energy play a vital role in protecting the environment and controlling climatic conditions, which oxide-based hybrid nanostructures show great potential for.  Hence, through this Special Issue, the role of hybrid structures in the production and storage of energy can be elucidated by focusing on various affecting factors, like synthesis techniques, Fermi-level and band engineering, hybrid defects, optical capability, kinetics, electrolyte pH, temperature, and interface migrations.

Dr. I. Neelakanta Reddy
Dr. Moorthy Dhanasekar
Dr. Mallikarjuna Koduru
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 2100 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

  • hybrid structure
  • materials engineering
  • pH
  • electrochemical 
  • energy storage

Benefits of Publishing in a Special Issue

  • Ease of navigation: Grouping papers by topic helps scholars navigate broad scope journals more efficiently.
  • Greater discoverability: Special Issues support the reach and impact of scientific research. Articles in Special Issues are more discoverable and cited more frequently.
  • Expansion of research network: Special Issues facilitate connections among authors, fostering scientific collaborations.
  • External promotion: Articles in Special Issues are often promoted through the journal's social media, increasing their visibility.
  • e-Book format: Special Issues with more than 10 articles can be published as dedicated e-books, ensuring wide and rapid dissemination.

Further information on MDPI's Special Issue polices can be found here.

Published Papers (2 papers)

Download All Papers
Order results
Result details
Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:

Research

14 pages, 4227 KiB  
Article
Boosted Electrochemical Activity with SnO2 Nanostructures Anchored on α-Fe2O3 for Improved Charge Transfer and Current Density
by Itheereddi Neelakanta Reddy, Bhargav Akkinepally, Jaesool Shim and Cheolho Bai
Crystals 2024, 14(8), 734; https://doi.org/10.3390/cryst14080734 - 18 Aug 2024
Viewed by 830
Abstract
This study presents a straightforward and cost-effective method to enhance the photoelectrochemical (PEC) water-splitting performance of α-Fe2O3 (F), SnO2 (S), and α-Fe2O3 decorated with SnO2 quantum dots (FS) photoanodes in a NaOH electrolyte. The FS [...] Read more.
This study presents a straightforward and cost-effective method to enhance the photoelectrochemical (PEC) water-splitting performance of α-Fe2O3 (F), SnO2 (S), and α-Fe2O3 decorated with SnO2 quantum dots (FS) photoanodes in a NaOH electrolyte. The FS electrode demonstrated a notable improvement in PEC efficiency within the electrolyte. In particular, the generated charges of the FS anode in the NaOH electrolyte reached approximately 12.01 mA cm−2 under illumination, indicating that the developed heterostructures effectively enhanced kinetics, leading to improved separation of induced carrier pairs. This active carrier-pair separation mechanism contributed considerably to the increased PEC activity in the 0.1 M NaOH electrolyte. The reduction in the bandgap of FS increased its absorption capability in visible light, which further enhanced the current density. Furthermore, the reduction in electrolyte resistance (9.71 Ω), internal resistance (20.19 Ω), charge transfer resistance (3.21 kΩ), Tafel slope (45.5 mV dec-1), limiting current density (−2.09 mA cm−2), and exchange current density (−3.68 mA cm−2) under illumination at the interface enhanced the charge density of FS. Further, a strong interaction among photoanode nanostructures significantly enhances PEC activity by improving efficient charge separation and transport, reducing recombination rates, and enabling quicker movement of charge carriers to the electrode/electrolyte interface. Thus, this study provides an effective approach to increasing the PEC activity of heterostructures. Full article
(This article belongs to the Special Issue Hybrid Materials for Energy Storage and Conversion)
►▼ Show Figures

Figure 1

12 pages, 2750 KiB  
Article
Mechanically Mixed Thermally Expanded Graphite/Cobalt(II) Perrhenate—Co(ReO4)2—As Electrodes in Hybrid Symmetric Supercapacitors
by Mateusz Ciszewski, Karolina Pianowska, Joanna Malarz, Katarzyna Leszczyńska-Sejda and Lukasz Hawelek
Crystals 2024, 14(7), 627; https://doi.org/10.3390/cryst14070627 - 8 Jul 2024
Viewed by 790
Abstract
A mechanically homogenized composite of expanded graphite and cobalt(II) perrhenate has been described. Cobalt(II) perrhenate was obtained in a reaction of perrhenic acid with cobalt(II) nitrate. A simple mortar homogenization method was used to enhance the intercalation of cobalt species within the carbon [...] Read more.
A mechanically homogenized composite of expanded graphite and cobalt(II) perrhenate has been described. Cobalt(II) perrhenate was obtained in a reaction of perrhenic acid with cobalt(II) nitrate. A simple mortar homogenization method was used to enhance the intercalation of cobalt species within the carbon matrix. The specific capacitance of the composite was enhanced by 50% (to 78 F/g) in comparison to bare expanded graphite (52 F/g). The electrochemical characteristics were significantly improved, including better cyclability (7% capacitance loss), a lower resistance of the electrode material, and a lower iR drop, with respect to expanded graphite without cobalt(II) perrhenate active species. Expanded graphite, with its unique specific surface area and pore size diameter, was proved to be a potential and cheap carbon support. Full article
(This article belongs to the Special Issue Hybrid Materials for Energy Storage and Conversion)
►▼ Show Figures

Graphical abstract

Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:
 
Displaying articles 1-2
Back to TopTop