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Coatings
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Dielectric Materials for Energy Storage, Energy Harvesting and Electrocaloric Applications
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Dielectric Materials for Energy Storage, Energy Harvesting and Electrocaloric Applications

A special issue of Coatings (ISSN 2079-6412). This special issue belongs to the section "Surface Engineering for Energy Harvesting, Conversion, and Storage".

Deadline for manuscript submissions: closed (31 August 2024) | Viewed by 4174

Special Issue Editors

Dr. Indrani Coondoo

E-Mail Website
Guest Editor
Department of Physics (DFiS) & CICECO-Aveiro Institute of Materials, University of Aveiro, 3810-193 Aveiro, Portugal
Interests: lead-free piezoelectric materials; ferroelectric and multiferroic materials: bulk, thin film, nanostructures; mechanical energy harvesting; electro/magnetocaloric effects; energy storage; nanoscale properties of functional materials via scanning probe techniques; ferroelectric liquid crystals
Special Issues, Collections and Topics in MDPI journals
Dr. Igor Bdikin

E-Mail Website
Guest Editor
Centre for Mechanical Technology Automation (TEMA), Mechanical Engineering Department and Aveiro Institute of Nanotechnology (AIN), University of Aveiro, 3810-193 Aveiro, Portugal
Interests: material science; crystallography; nanotechnology; X-ray topography; X-ray dynamical diffraction; structure phase transitions under high pressure; thin films; domain and twinning structures; high-temperature superconductors; atomic force microscope of ceramics and ferroelectrics; organic ferroelectrics
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

We are pleased to announce the launch of a Special Issue on "Dielectric Materials for Energy Storage, Energy Harvesting and Electrocaloric Applications" in Coatings. This Special Issue aims to highlight the latest research and advancements in the field of dielectric materials, with a specific focus on their applications in energy storage, energy harvesting and electrocaloric applications.

Dielectric materials play a crucial role in various fields of science and technology, offering unique electrical and thermal properties that enable efficient energy manipulation and conversion. Their ability to store and release electrical energy, coupled with their insulating characteristics, makes them ideal for energy storage applications. In recent years, dielectric materials, such as polymers and ceramics, have shown great promise in developing high-performance capacitors and supercapacitors. These materials offer excellent dielectric properties, allowing for increased energy density, faster charging/discharging rates, and improved stability.

Furthermore, the Special Issue also highlights the emerging field of electrocaloric cooling, which utilizes the electric field-induced temperature changes in dielectric materials. Electrocaloric cooling offers a promising alternative to traditional refrigeration technologies by providing a more environmentally friendly and energy-efficient cooling mechanism.

We invite researchers and experts from academia, industry, and related disciplines to contribute their original research articles or reviews to this Special Issue. Topics of interest include, but are not limited to:

  • Novel dielectric materials for energy storage and capacitors;
  • Advances in thin film deposition techniques for dielectric materials;
  • Electrocaloric effect in dielectric materials for solid-state cooling;
  • Dielectric polymers for energy harvesting applications;
  • Nanogenerators based on dielectric materials for self-powered systems;
  • Characterization techniques for dielectric materials in energy applications.

We anticipate that this Special Issue will provide a platform for researchers to share their latest findings, exchange ideas and foster collaborations in the field of dielectric materials for energy-related applications. We look forward to receiving your valuable contributions and making this Special Issue a significant resource for the scientific community.

Dr. Indrani Coondoo
Dr. Igor Bdikin
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. Coatings 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

  • energy storage
  • electrocaloric cooling
  • energy harvesting
  • nanogenerator
  • polymers
  • thin films
  • ceramics

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

Published Papers (4 papers)

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Research

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18 pages, 9616 KiB  
Article
Endurance to Multiple Factors of Water-Based Electrically Conductive Paints with Metallic Microparticles
by Alina Ruxandra Caramitu, Romeo Cristian Ciobanu, Mihaela Aradoaei, Magdalena Valentina Lungu, Nicoleta Oana Nicula and Eduard Marius Lungulescu
Coatings 2024, 14(8), 1016; https://doi.org/10.3390/coatings14081016 - 10 Aug 2024
Viewed by 541
Abstract
The paper describes the innovative adaptation of some specific environmental tests from general organic coatings towards newly developed water-based composite paints with metallic particles (Al and Fe), with a high content of metal (10% and respectively 20%) for electromagnetic shielding applications. Electrical conductivity [...] Read more.
The paper describes the innovative adaptation of some specific environmental tests from general organic coatings towards newly developed water-based composite paints with metallic particles (Al and Fe), with a high content of metal (10% and respectively 20%) for electromagnetic shielding applications. Electrical conductivity is the most affected dielectric parameter under both by UV radiation and thermal exposure. The paints with 20% metallic powder are more sensitive to environmental factors, and the influence of metal type could also be emphasized in relation to the dielectric feature evolution vs. exposure time. The action of mold significantly decreases the dielectric features of paints, but the weathering aging effect is much more enhanced if the samples are cumulatively submitted to thermal aging and respectively UV exposure, along with the action of mold. The potential application of the study is related mainly to the development of new autonomous electric cars, which need special conditions of electromagnetic shielding, under the circumstances that the conductive paint layers are normally very sensitive to environmental factors, affecting the equipment performance and security. Full article
(This article belongs to the Special Issue Dielectric Materials for Energy Storage, Energy Harvesting and Electrocaloric Applications)
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18 pages, 6078 KiB  
Article
Composite Paints with High Content of Metallic Microparticles for Electromagnetic Shielding Purposes
by Romeo Cristian Ciobanu, Mihaela Aradoaei, Alina Ruxandra Caramitu, Magdalena Valentina Lungu, Oliver Daniel Schreiner and Ioana Ion
Coatings 2024, 14(7), 874; https://doi.org/10.3390/coatings14070874 - 12 Jul 2024
Cited by 1 | Viewed by 649
Abstract
This paper describes the technological process used to manufacture composite paints with a high content of metallic microparticles (Al and Fe) for automotive electromagnetic compatibility applications. The thickness of the deposited paint layer was larger for paints with a greater metal content, regardless [...] Read more.
This paper describes the technological process used to manufacture composite paints with a high content of metallic microparticles (Al and Fe) for automotive electromagnetic compatibility applications. The thickness of the deposited paint layer was larger for paints with a greater metal content, regardless of the plastic support used for paint deposition. The roughness of paint layers with a greater content of metal particles was about 30%–35% higher than that of layers with a lower metal particle content, regardless of the metal type. The surface roughness of paint layers containing Al was at least 2.5-times higher than that of paint layers containing Fe, an aspect that could be explained by the better formulation of the paint containing Fe. The dielectric loss and conductivity values crucially depend on the plastic substrate used, meaning that the dipolar polarization of the substrate enhances the effect of conductive paints. Based on the dielectric properties measured at 10 kHz, the optimal recipe for efficient electromagnetic compatibility was found to be 20 wt.% Fe powder, deposited on a sandblasted polycarbonate (PC) substrate. It is expected that formulations of paints with a high percentage of metallic particles will effectively compete with traditional plastic metallization technologies. Full article
(This article belongs to the Special Issue Dielectric Materials for Energy Storage, Energy Harvesting and Electrocaloric Applications)
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13 pages, 15698 KiB  
Article
Performance and Properties of a Ti-Al Composite Anodic Oxide Film on AC-Etched Al Foil
by Chaolei Ban, Xiangjun Luo, Jinchao Sun, Qingxu Wu and Yibin Yin
Coatings 2023, 13(9), 1526; https://doi.org/10.3390/coatings13091526 - 30 Aug 2023
Cited by 2 | Viewed by 947
Abstract
AC-etched aluminum foils for an Al electrolytic capacitor were covered with a TiO2 film by a sol–gel coating and then anodized to 25 V in an ammonium adipate solution. The structure, properties, and performance of the anodic oxide films were examined by [...] Read more.
AC-etched aluminum foils for an Al electrolytic capacitor were covered with a TiO2 film by a sol–gel coating and then anodized to 25 V in an ammonium adipate solution. The structure, properties, and performance of the anodic oxide films were examined by transmission electron microscopy (TEM), scanning electron microscopy (SEM), electrochemical impedance measurements (EIS), a general digital LCR meter, a TV characteristic tester, and multicycle pulse charging–discharging. It was found that the anodizing of aluminum coated with TiO2 films led to the formation of Al-Ti composite anodic oxide films, which consist of an outer Al-Ti composite oxide layer and an inner Al2O3 layer on the metal substrate. The capacitance (C25V) of the anodic oxide films formed on specimens with a TiO2 coating was about 10% larger than without a TiO2 coating. The specific resistance (Rox) of the Al-Ti composite film measured by EIS was lower than the blank one, accounting for a greater increase in the rise time (Tr) and a slight reduction in the withstand voltage (Vt). After hydration and a multicycle pulse charging–discharging destructive test, the Al-Ti composite anodic oxide film maintained the same good, comprehensive dielectric properties and performance as the blank one, thereby proving to be promising for acting as dielectric layers. Full article
(This article belongs to the Special Issue Dielectric Materials for Energy Storage, Energy Harvesting and Electrocaloric Applications)
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Review

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23 pages, 12069 KiB  
Review
Recent Progress in Electromagnetic Wave Absorption Coatings: From Design Principles to Applications
by Yang Jin, Haojie Yu, Yun Wang, Li Wang and Bohua Nan
Coatings 2024, 14(5), 607; https://doi.org/10.3390/coatings14050607 - 11 May 2024
Viewed by 1595
Abstract
It is essential to develop electromagnetic (EM) wave-absorbing materials with exceptional versatility to address a variety of applications, including anti-radar stealth, EM radiation protection, and EM interference shielding. EM wave absorption coatings, mainly composed of matrices and EM absorbers, have excellent practical performance. [...] Read more.
It is essential to develop electromagnetic (EM) wave-absorbing materials with exceptional versatility to address a variety of applications, including anti-radar stealth, EM radiation protection, and EM interference shielding. EM wave absorption coatings, mainly composed of matrices and EM absorbers, have excellent practical performance. Researchers have been developing advanced EM absorption coating with properties like thin, light, broadband, and anti-aging. This review summarizes the recent progress in EM absorption coatings, including the design principles, feedstocks, manufacturing techniques, performance evaluation methods, and applications. Finally, the current challenges and future research directions are discussed. Full article
(This article belongs to the Special Issue Dielectric Materials for Energy Storage, Energy Harvesting and Electrocaloric Applications)
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