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High-Performance Supercapacitors
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High-Performance Supercapacitors

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

Deadline for manuscript submissions: closed (10 December 2021) | Viewed by 9339

Special Issue Editor

Dr. Sunkara Srinivasa Rao

E-Mail Website
Guest Editor
School of Mechanical and Mechatronics Engineering, Kyung Sung University, Suyeong-ro, Nam-gu, Busan 48434, Korea
Interests: energy conversion and storage; synthesis of nanomaterials; solar cells; batteries; supercapacitors;
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Lightweight, high-performance, and environmentally friendly energy storage and generation devices, such as those based on hydropower, solar energy, and wind energy in addition to lithium ion batteries and supercapacitors (SCs), are one of the key solutions to relieving the heavy burden on the current energy infrastructure, modern electronic industry, and the environment. The Paris Climate Change Agreement has fueled the development of low carbon footprint-based energy storage and conversion devices in an effort to maintain the global average temperature increase at below 2 °C. Batteries are employed as electrical energy storage device in electric vehicles (EVs) owing to their high energy density. However, batteries suffer from longer charging time, low power density, and poor shelf and cycle life. In comparison to conventional batteries, SCs offer higher power density, amenability for large-scale production, faster charge–discharge rate along with remarkable cycling stability, rendering them potential energy storage device contenders in EV.

On the other hand, the energy density of commercialized SCs suffers from relatively low values compared to rechargeable batteries and does not satisfy the ever-increasing energy requirement of next-generation electronic devices. The most crucial factor for the preparation of efficient SCs are the selection of materials and fabrication of high-performance electrode materials with high electrical conductivity to ensure rapid charge–discharge. Another promising solution to enhance the energy density of SCs is to increase the specific capacitance and output voltage.

This Special Issue is focused on bringing together innovative developments and synergies in the field of high-performance SCs.

Submit your paper and select the Journal “Energies” and the Special Issue “High-Performance Supercapacitors” via: MDPI submission system. Please contact the special issue editor ([email protected]) for any queries. Our papers will be published on a rolling basis and we will be pleased to receive your submission once you have finished it.

Dr. Sunkara Srinivasa Rao
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. 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 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

  • high-performance supercapacitors
  • energy devices
  • cyclic voltammetry
  • galvanostatic charge–discharge
  • electrochemical impedance spectroscopy
  • flexible supercapacitors

Published Papers (4 papers)

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Research

12 pages, 3884 KiB  
Article
Facile Route for Fabrication of Ferrimagnetic Mn3O4 Spinel Material for Supercapacitors with Enhanced Capacitance
by Wenjuan Yang, Mohamed Nawwar and Igor Zhitomirsky
Energies 2022, 15(5), 1812; https://0-doi-org.brum.beds.ac.uk/10.3390/en15051812 - 01 Mar 2022
Cited by 4 | Viewed by 1868
Abstract
The purpose of this investigation was the development of a new colloidal route for the fabrication of Mn3O4 electrodes for supercapacitors with enhanced charge storage performance. Mn3O4-carbon nanotube electrodes were fabricated with record-high capacitances of 6.67 [...] Read more.
The purpose of this investigation was the development of a new colloidal route for the fabrication of Mn3O4 electrodes for supercapacitors with enhanced charge storage performance. Mn3O4-carbon nanotube electrodes were fabricated with record-high capacitances of 6.67 F cm−2 obtained from cyclic voltammetry tests at a scan rate of 2 mV s−1 and 7.55 F cm−2 obtained from the galvanostatic charge–discharge tests at a current density of 3 mA cm−2 in 0.5 M Na2SO4 electrolyte in a potential window of 0.9 V. The approach involves the use of murexide as a capping agent for the synthesis of Mn3O4 and a co-dispersant for Mn3O4 and carbon nanotubes. Good electrochemical performance of the electrode material was achieved at a high active mass loading of 40 mg cm−2 and was linked to a reduced agglomeration of Mn3O4 nanoparticles and efficient co-dispersion of Mn3O4 with carbon nanotubes. The mechanisms of murexide adsorption on Mn3O4 and carbon nanotube are discussed. With the proposed method, the time-consuming electrode activation procedure for Mn3O4 electrodes can be avoided. The approach developed in this investigation paves the way for the fabrication of advanced cathodes for asymmetric supercapacitors and multifunctional devices, combining capacitive, magnetic, and other functional properties. Full article
(This article belongs to the Special Issue High-Performance Supercapacitors)
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12 pages, 2559 KiB  
Article
Aligned Ti3C2TX Aerogel with High Rate Performance, Power Density and Sub-Zero-Temperature Stability
by Xinchao Lu, Huachao Yang, Zheng Bo, Biyao Gong, Mengyu Cao, Xia Chen, Erka Wu, Jianhua Yan, Kefa Cen and Kostya (Ken) Ostrikov
Energies 2022, 15(3), 1191; https://0-doi-org.brum.beds.ac.uk/10.3390/en15031191 - 06 Feb 2022
Cited by 6 | Viewed by 1742
Abstract
Ti3C2Tx-based aerogels have attracted widespread attention for three-dimensional porous structures, which are promising to realize high-rate energy storage. However, disordered Ti3C2Tx aerogels with highly tortuous porosity fabricated by conventional unidirectional freeze-casting substantially [...] Read more.
Ti3C2Tx-based aerogels have attracted widespread attention for three-dimensional porous structures, which are promising to realize high-rate energy storage. However, disordered Ti3C2Tx aerogels with highly tortuous porosity fabricated by conventional unidirectional freeze-casting substantially increase ion diffusion lengths and hinder electrolyte ions transport. Herein we demonstrate a new bidirectional ice-templated approach to synthesize porous ordered Ti3C2Tx aerogel with straight and aligned channels, straight and short ion diffusion pathways, leading to better ion accessibility. The aligned Ti3C2Tx aerogel exhibits the high specific capacitance of 345 F g−1 at 20 mV s−1 and rate capability of 52.2% from 10 to 5000 mV s−1. The specific capacitance is insensitive of mass loadings even at 10 mg cm−2 and an excellent power density of 137.3 mW cm–2 is obtained in symmetric supercapacitors. The electrochemical properties of Ti3C2Tx aerogel supercapacitors at sub-zero (to −30 °C) temperatures are reported for the first time. The aligned Ti3C2Tx aerogel delivers temperature-independent rate performance and high capacitance retention (73% at 50 mV s−1 from 25 to −30 °C) due to the unique structure with metallic conductivity. Full article
(This article belongs to the Special Issue High-Performance Supercapacitors)
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12 pages, 3745 KiB  
Article
Electrical and Mathematical Modeling of Supercapacitors: Comparison
by Zineb Cabrane and Soo Hyoung Lee
Energies 2022, 15(3), 693; https://0-doi-org.brum.beds.ac.uk/10.3390/en15030693 - 18 Jan 2022
Cited by 17 | Viewed by 3290
Abstract
Supercapacitors are energy storage devices with high electrical power densities and long spanlife. Therefore, supercapacitor-based energy storage systems have been employed for a variety of applications. The modelling and simulation of SCs have been of great interest to this objective. This paper presents [...] Read more.
Supercapacitors are energy storage devices with high electrical power densities and long spanlife. Therefore, supercapacitor-based energy storage systems have been employed for a variety of applications. The modelling and simulation of SCs have been of great interest to this objective. This paper presents an electrical schema and mathematical modelling of three models of supercapacitors. The first is the RC model, the second is the two-branch model and the third is the multi-branch model. The objective of this modelling is to choose the best model that can respect the same behaviour of the experimental model. These models are compared with an experimental model. This comparison prove that the response voltage of the multi-branch model correctly describes the behaviour of the experimental model of Belhachemi. The disadvantage of this model is the slow simulation duration in MATLAB/Simulink. The RC model represented the faster model in terms of simulation. The choice of 15 branches in parallel in multi-branch models gives good results and correctly describes the reel model. The automatic charge and discharge voltage of SCs reduce by reducing the charge current. Full article
(This article belongs to the Special Issue High-Performance Supercapacitors)
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10 pages, 2113 KiB  
Article
Facile Synthesis of Coral Reef-Like ZnO/CoS2 Nanostructure on Nickel Foam as an Advanced Electrode Material for High-Performance Supercapacitors
by Ikkurthi Kanaka Durga, Kummara Venkata Guru Raghavendra, Naga Bhushanam Kundakarla, Suresh Alapati, Jin-Woo Ahn and Sunkara Srinivasa Rao
Energies 2021, 14(16), 4925; https://0-doi-org.brum.beds.ac.uk/10.3390/en14164925 - 11 Aug 2021
Cited by 7 | Viewed by 1786
Abstract
Nanocomposite electrodes receive much attention because of their excellent energy storage nature. Electrodes for supercapacitors have come a major source of interest. In this pursuit, the current work elucidates binder-free coral reefs resembling ZnO/CoS2 nanoarchitectures synthesized on the surface of Ni foams [...] Read more.
Nanocomposite electrodes receive much attention because of their excellent energy storage nature. Electrodes for supercapacitors have come a major source of interest. In this pursuit, the current work elucidates binder-free coral reefs resembling ZnO/CoS2 nanoarchitectures synthesized on the surface of Ni foams employing the cost-effective hydrothermal route. The Zno/CoS2 nanocomposite demonstrated excellent battery-type behavior, which can be employed for supercapcitor application. Various analyses were carried out in the current study, such as X-ray diffraction and high-resolution scanning electron microscopy, which allowed defining the crystalline nature and morphology of surface with ZnO/CoS2 nanoarchitectures. Electrochemical measures such as cyclic voltammetry, galvanostatic charge discharge, and potentiostatic impedance spectroscopy confirmed the battery-type behavior of the material. The synthesized precursors of binder-free ZnO/CoS2 nanostructures depicted an excellent specific capacity of 400.25 C·g−1 at 1 A·g−1, with a predominant cycling capacity of 88. 2% and retention holding of 68% at 10 A·g−1 and 2 A·g−1, even after 4000 cycles, representing an improvement compared to the pristine ZnO and CoS2 electroactive materials. Therefore, the electrochemical and morphological analyses suggest the excellent behavior of the ZnO/CoS2 nanoarchitectures, making them promising for supercapacitors. Full article
(This article belongs to the Special Issue High-Performance Supercapacitors)
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