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Special Issue "Novel Materials and Technologies for Supercapacitor Applications"

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "D1: Advanced Energy Materials".

Deadline for manuscript submissions: closed (16 November 2021).

Special Issue Editor

Dr. Jung Bin In
E-Mail Website
Guest Editor
School of Mechanical Engineering, Chung-Ang University, Seoul 06974, Korea
Interests: supercapacitors; wearable devices; carbon nanomaterials; crystal growth; laser thermal processing; micro/nano fabrication

Special Issue Information

Dear Colleagues,

In this Special Issue, we would like to invite submissions of interesting papers that highlight the promise of novel materials and fabrication technology for high-performance supercapacitors. Interest in high-performance energy storage devices is exponentially increasing, necessitating the development of novel electrode materials. Researchers have demonstrated that supercapacitors built with novel materials exhibit high capacitance with interesting functionalities such as mechanical flexibility, optical transparency, structural self-healability, and biodegradablity. These supercapacitors are expected to play a central role in futuristic electronics as a main or auxiliary energy storage device. Various techniques are being developed for the fabrication of supercapacitor electrodes and their precise integration with flexible substrates, such as films and fibers. These techniques enable miniaturization of supercapacitors, which offers another great opportunity to realize wearable supercapacitors.

This Special Issue covers various topics related to novel materials and technologies for cutting-edge supercapacitors, including but not limited to the following:

  • Microsupercapacitor;
  • Synthesis techniques for electrode materials;
  • Mesoporous materials
  • Carbon nanomaterials;
  • Laser-induced graphene;
  • Pseudocapacitive materials;
  • Flexible current collectors;
  • Pyrolysis techniques for the fabrication of supercapacitor electrode;
  • Direct writing fabrication of supercapacitor electrode;
  • 3D printing technology for electrode fabrication;
  • Fiber-type supercapacitor;
  • Reliability evaluation of flexible supercapacitors;
  • Supercapacitor integration with wearable electronics.

Assoc. Prof. Jung Bin In
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 papers will be 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. Energies 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 2000 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

  • supercapacitor
  • microsupercapacitor
  • energy storage
  • nanomaterial
  • pyrolysis
  • laser-induced graphene
  • micropattern
  • flexible electrolyte
  • flexible supercapacitor
  • fiber-type supercapacitor
  • wearable devices

Published Papers (3 papers)

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Research

Article
Influence of the Hydrophilic Surface of Nanofiber Support on the Performance of Hybrid Supercapacitors
Energies 2021, 14(22), 7621; https://doi.org/10.3390/en14227621 - 15 Nov 2021
Viewed by 213
Abstract
Concerns associated with global warming and the depleting reserves of fossil fuels have highlighted the importance of high−performance energy storage systems (ESSs) for efficient energy usage. ESSs such as supercapacitors can contribute to improved power quality of an energy generation system, which is [...] Read more.
Concerns associated with global warming and the depleting reserves of fossil fuels have highlighted the importance of high−performance energy storage systems (ESSs) for efficient energy usage. ESSs such as supercapacitors can contribute to improved power quality of an energy generation system, which is characterized by a slow load response. Composite materials are primarily used as supercapacitor electrodes because they can compensate for the disadvantages of carbon or metal oxide electrode materials. In this study, a composite of oxide nanoparticles loaded on a carbon nanofiber support was used as an electrode material for a hybrid supercapacitor. The addition of a small amount of hydrophilic [email protected] (Fe− and N−doped graphene nanoplates) modified the surface properties of carbon nanofibers prepared by electrospinning. Accordingly, the effects of the hydrophobic/hydrophilic surface properties of the nanofiber support on the morphology of Co3O4 nanoparticles loaded on the nanofiber, as well as the performance of the supercapacitor, were systematically investigated. Full article
(This article belongs to the Special Issue Novel Materials and Technologies for Supercapacitor Applications)
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Article
Digitally Patterned Mesoporous Carbon Nanostructures of Colorless Polyimide for Transparent and Flexible Micro-Supercapacitor
Energies 2021, 14(9), 2547; https://doi.org/10.3390/en14092547 - 29 Apr 2021
Viewed by 692
Abstract
Here, we demonstrate the fabrication of a flexible and transparent micro-supercapacitor (MSC), using colorless polyimide (CPI) via a direct laser writing carbonization (DLWC) process. The focused laser beam directly carbonizes the CPI substrate and generates a porous carbon structure on the surface of [...] Read more.
Here, we demonstrate the fabrication of a flexible and transparent micro-supercapacitor (MSC), using colorless polyimide (CPI) via a direct laser writing carbonization (DLWC) process. The focused laser beam directly carbonizes the CPI substrate and generates a porous carbon structure on the surface of the CPI substrate. Fluorine, which is one of the chemical compositions of CPI, can enhance the specific area and the conductivity of the carbon electrode by creating micropores in carbon structures during carbonization. Thus, the fabricated carbonized CPI-based MSC shows enhanced specific capacitance (1.20 mF at 10 mV s−1) and better transmittance (44.9%) compared to the conventional PI-based MSC. Additionally, the fabricated carbonized CPI-based MSC shows excellent cyclic performance with minimal reduction (<~10%) in 3000 cycles and high capacitance retention under mechanical bending test conditions. Due to its high flexibility, transparency, and capacitance, we expect that carbonized CPI-based MSC can be further applied to various flexible and transparent applications. Full article
(This article belongs to the Special Issue Novel Materials and Technologies for Supercapacitor Applications)
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Article
Densified Laser-Induced Graphene for Flexible Microsupercapacitors
Energies 2020, 13(24), 6567; https://doi.org/10.3390/en13246567 - 13 Dec 2020
Cited by 4 | Viewed by 786
Abstract
Microsupercapacitors have attracted significant attention due to several of their advantageous characteristics such as lightweight, small volume, and planar structure that is favorable for high mechanical flexibility. Among the various micro supercapacitor forms, those with laser-induced graphene (LIG) electrodes are promising as flexible [...] Read more.
Microsupercapacitors have attracted significant attention due to several of their advantageous characteristics such as lightweight, small volume, and planar structure that is favorable for high mechanical flexibility. Among the various micro supercapacitor forms, those with laser-induced graphene (LIG) electrodes are promising as flexible energy storage devices. While LIG microelectrodes can be fabricated simply by direct laser writing, the capacitance and energy density of these devices are limited because of the relatively low density of LIG, which leads to low surface areas. These limitations could be overcome by densifying the LIG. Here, we report the use of densified laser-induced graphene (d-LIG) to fabricate flexible micro supercapacitors. Interdigitated d-LIG electrodes were prepared by duplicate laser pyrolysis of a polyimide sheet by using a CO2 laser. A PVA-H2SO4 gel-type electrolyte was then applied to the d-LIG electrode surface to assemble a d-LIG micro supercapacitor. This d-LIG micro supercapacitor exhibited substantially increased capacitance and energy density versus conventional low-density LIG micro supercapacitors. While the d-LIG electrode exhibited a substantial change in resistance when subjected to bending at a radius of 3 mm, the change in the capacitance of the d-LIG micro supercapacitor was negligible at the same bending radius due to reinforcement by the infiltrated poly(vinyl alcohol) (PVA) electrolyte, demonstrating the potential application of d-LIG micro supercapacitors in wearable electronics. Full article
(This article belongs to the Special Issue Novel Materials and Technologies for Supercapacitor Applications)
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