Search for Articles:
Title / Keyword
Author / Affiliation / Email
Journal
Article Type
 
 
Advanced Search
 
Section
Special Issue
Volume
Issue
Number
Page
 
7.4
5.3
Journals
Nanomaterials
Special Issues
Properties and Applications of Film Capacitor
share announcement

Properties and Applications of Film Capacitor

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Energy and Catalysis".

Deadline for manuscript submissions: closed (28 February 2023) | Viewed by 7721

Special Issue Editor

Prof. Dr. Andrei Ionut Mardare

E-Mail Website
Guest Editor
Institute of Chemical Technology of Inorganic Materials, Johannes Kepler University Linz, 4040 Linz, Austria
Interests: thin films; deposition techniques; electrochemistry; nanostructures; electrocatalysis
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Modern technological trends bring an extensive use of the concept of capacitors. Those two plan-parallel plates we all learned about at school are of great relevance in many fields today. Apart from their direct use as a circuit element in electronics, metal–dielectric–metal structures are found in applications based on piezo- and ferroelectrics, hot electron sources, nonvolatile memories, memristive devices, batteries and supercapacitors, etc. 

Modern technology has also given us films, and today, the number of applications for thin and thick films surpasses that for bulk materials. The major player here is the electronic industry, but medical applications are a close second, being bridged by plastic electronics. Combining the concept of capacitors with that of a film was a marvelous idea that has been in use since the beginning of transistors. Our daily life as we know it, indeed, would not be possible without film capacitors. 

This Special Issue of Nanomaterials will focus on “Properties and Applications of Film Capacitor”. The subject will cover many different aspects and modern applications of capacitors. Thus, please allow me to welcome your contributions from various fields. 

Prof. Dr. Andrei Ionut Mardare
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. Nanomaterials 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 2900 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

  • supercapacitors
  • high-k dielectrics
  • memristors
  • capacitive sensors
  • metal–insulator–metal
  • superimposed layers
  • thin/thick films
  • film electrodes

Published Papers (5 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

13 pages, 3889 KiB  
Article
Sustainable Cauliflower-Patterned CuFe2O4 Electrode Production from Chalcopyrite for Supercapacitor Applications
by Moctar Mbebou, Safa Polat and Huseyin Zengin
Nanomaterials 2023, 13(6), 1105; https://0-doi-org.brum.beds.ac.uk/10.3390/nano13061105 - 20 Mar 2023
Cited by 3 | Viewed by 1536
Abstract
The primary purpose of this study was to produce an ore-based high-capacity supercapacitor electrode. For this, chalcopyrite ore was first leached with nitric acid, and then metal oxide synthesis was carried out immediately on nickel foam using a hydrothermal technique from the solution. [...] Read more.
The primary purpose of this study was to produce an ore-based high-capacity supercapacitor electrode. For this, chalcopyrite ore was first leached with nitric acid, and then metal oxide synthesis was carried out immediately on nickel foam using a hydrothermal technique from the solution. Cauliflower-patterned CuFe2O4 with a wall thickness of about 23 nm was synthesized on the Ni foam surface, characterized by XRD, FTIR, XPS, SEM, and TEM investigations. The produced electrode also displayed a feature of a battery-like charge storage mechanism with a specific capacity of 525 mF cm−2 at 2 mA cm−2 current density, energy of 8.9 mWh cm−2, and a power density of 233 mW cm−2. Additionally, even after 1350 cycles, this electrode still performed at 109% of its original capacity. The performance of this finding is 255% higher than that of the CuFe2O4 in our earlier investigation; despite being pure, it performs far better than some of its equivalents in the literature. Obtaining such performance from an electrode made from ore indicates that the use of ore has a lot of potential for supercapacitor production and property improvement. Full article
(This article belongs to the Special Issue Properties and Applications of Film Capacitor)
►▼ Show Figures

Figure 1

11 pages, 2718 KiB  
Article
H2 Plasma and PMA Effects on PEALD-Al2O3 Films with Different O2 Plasma Exposure Times for CIS Passivation Layers
by Jehyun An, Kyeongkeun Choi, Jongseo Park, Bohyeon Kang, Hyunseo You, Sungmin Ahn and Rockhyun Baek
Nanomaterials 2023, 13(4), 731; https://0-doi-org.brum.beds.ac.uk/10.3390/nano13040731 - 14 Feb 2023
Viewed by 1490
Abstract
In this study, the electrical properties of Al2O3 film were analyzed and optimized to improve the properties of the passivation layer of CMOS image sensors (CISs). During Al2O3 deposition processing, the O2 plasma exposure time was [...] Read more.
In this study, the electrical properties of Al2O3 film were analyzed and optimized to improve the properties of the passivation layer of CMOS image sensors (CISs). During Al2O3 deposition processing, the O2 plasma exposure time was adjusted, and H2 plasma treatment as well as post-metallization annealing (PMA) were performed as posttreatments. The flat-band voltage (Vfb) was significantly shifted (ΔVfb = 2.54 V) in the case of the Al2O3 film with a shorter O2 plasma exposure time; however, with a longer O2 plasma exposure time, Vfb was slightly shifted (ΔVfb = 0.61 V) owing to the reduction in the carbon impurity content. Additionally, the as-deposited Al2O3 sample with a shorter O2 plasma exposure time had a larger number of interface traps (interface trap density, Dit = 8.98 × 1013 eV−1·cm−2). However, Dit was reduced to 1.12 × 1012 eV−1·cm−2 by increasing the O2 plasma exposure time and further reduced after PMA. Consequently, we fabricated an Al2O3 film suitable for application as a CIS passivation layer with a reduced number of interface traps. However, the Al2O3 film with increased O2 plasma exposure time deteriorated owing to plasma damage after H2 plasma treatment, which is a method of reducing carbon impurity content. This deterioration was validated using the C–V hump and breakdown characteristics. Full article
(This article belongs to the Special Issue Properties and Applications of Film Capacitor)
►▼ Show Figures

Figure 1

13 pages, 2484 KiB  
Article
The Effect of Anodizing Bath Composition on the Electronic Properties of Anodic Ta-Nb Mixed Oxides
by Giada Tranchida, Andrea Zaffora, Francesco Di Franco and Monica Santamaria
Nanomaterials 2022, 12(24), 4439; https://0-doi-org.brum.beds.ac.uk/10.3390/nano12244439 - 14 Dec 2022
Viewed by 1156
Abstract
Anodic oxides were grown to 50 V on Ta-Nb sputtering deposited alloys, with high Nb content, in acetate ions containing an aqueous solution to study the effect of the anodizing bath composition on anodic layers’ dielectric properties. Photoelectrochemical measurements proved the presence of [...] Read more.
Anodic oxides were grown to 50 V on Ta-Nb sputtering deposited alloys, with high Nb content, in acetate ions containing an aqueous solution to study the effect of the anodizing bath composition on anodic layers’ dielectric properties. Photoelectrochemical measurements proved the presence of a photocurrent in the band gap of photon energy lower than oxides, due to optical transitions involving localized electronic states as a consequence of acetate ions incorporation. Flat band potential value estimates assessed the insulating nature of the anodic oxides grown in the acetate buffer solution. Differential capacitance measurements showed that the highest capacitance value was measured for the sample grown on Ta-66%Nb. This capacitance value was higher with respect to those estimated for pure Ta and pure Nb anodic layers and with respect to the same alloy anodized in NaOH solution, i.e., acetate-free anodizing bath. Full article
(This article belongs to the Special Issue Properties and Applications of Film Capacitor)
►▼ Show Figures

Figure 1

10 pages, 1809 KiB  
Article
Substantial Na-Ion Storage at High Current Rates: Redox-Pseudocapacitance through Sodium Oxide Formation
by Engelbert Portenkirchner
Nanomaterials 2022, 12(23), 4264; https://0-doi-org.brum.beds.ac.uk/10.3390/nano12234264 - 30 Nov 2022
Viewed by 1016
Abstract
Batteries and supercapacitors, both governed by electrochemical processes, operate by different electrochemical mechanisms which determine their characteristic energy and power densities. Battery materials store large amounts of energy by ion intercalation. Electrical double-layer capacitors store charge through surface-controlled ion adsorption which leads to [...] Read more.
Batteries and supercapacitors, both governed by electrochemical processes, operate by different electrochemical mechanisms which determine their characteristic energy and power densities. Battery materials store large amounts of energy by ion intercalation. Electrical double-layer capacitors store charge through surface-controlled ion adsorption which leads to high power and rapid charging, but much smaller amounts of energy stored. Pseudocapacitive materials offer the promise to combine these properties by storing charge through surface-controlled, battery-like redox reactions but at high rates approaching those of electrochemical double-layer capacitors. This work compares the pseudo-capacitive charge storage characteristics of self-organized titanium dioxide (TiO2−x) nanotubes (NTs) to flat TiO2−x surface films to further elucidate the proposed charge storage mechanism within the formed surface films. By comparing TiO2−x NTs to flat TiO2−x surface films, having distinctively different oxide mass and surface area ratios, it is shown that NaO2 and Na2O2 formation, which constitutes the active surface film material, is governed by the metal oxide bulk. Our results corroborate that oxygen diffusion from the lattice oxide is key to NaO2 and Na2O2 formation. Full article
(This article belongs to the Special Issue Properties and Applications of Film Capacitor)
►▼ Show Figures

Figure 1

10 pages, 2144 KiB  
Article
Comparative Behavior of Viscose-Based Supercapacitor Electrodes Activated by KOH, H2O, and CO2
by Stefan Breitenbach, Jiri Duchoslav, Andrei Ionut Mardare, Christoph Unterweger, David Stifter, Achim Walter Hassel and Christian Fürst
Nanomaterials 2022, 12(4), 677; https://0-doi-org.brum.beds.ac.uk/10.3390/nano12040677 - 18 Feb 2022
Cited by 7 | Viewed by 1626
Abstract
Activated carbons derived from viscose fibers were prepared using potassium hydroxide, carbon dioxide, or water vapor as activation agents. The produced activated carbon fibers were analyzed via scanning electron microscopy and energy dispersive X-ray spectroscopy, and their porosity (specific surface area, total pore [...] Read more.
Activated carbons derived from viscose fibers were prepared using potassium hydroxide, carbon dioxide, or water vapor as activation agents. The produced activated carbon fibers were analyzed via scanning electron microscopy and energy dispersive X-ray spectroscopy, and their porosity (specific surface area, total pore volume, and pore size distribution) was calculated employing physisorption experiments. Activated carbon fibers with a specific surface area of more than 2500 m2 g−1 were obtained by each of the three methods. Afterwards, the suitability of these materials as electrodes for electrochemical double-layer capacitors (supercapacitors) was investigated using cyclic voltammetry, galvanostatic measurements, and electrochemical impedance spectroscopy. By combining CO2 and H2O activation, activated carbon fibers of high purity and excellent electrochemical performance could be obtained. A specific capacitance per electrode of up to 180 F g−1 was found. In addition, an energy density per double-layer capacitor of 42 W h kg−1 was achieved. These results demonstrate the outstanding electrochemical properties of viscose-based activated carbon fibers for use as electrode materials in energy storage devices such as supercapacitors. Full article
(This article belongs to the Special Issue Properties and Applications of Film Capacitor)
►▼ Show Figures

Figure 1

Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:
 
Displaying articles 1-5
Back to TopTop