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Exploration of Two-Dimensional Mixed Metal Oxide Nanocomposites for the Fabrication of High Energy Density Supercapacitors

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Advanced Nanomaterials and Nanotechnology".

Deadline for manuscript submissions: 10 January 2025 | Viewed by 1285

Special Issue Editors


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Guest Editor
1. Department of Mechanical Engineering, Advanced Institute of Manufacturing with High-Tech Innovations, National Chung Cheng University, Chiayi 621301, Taiwan
2. Australian Center for Sustainable Development Research and Innovation (ACSDRI), Unit 36/21 South Tce, Adelaide SA 5000, Australia
Interests: 2D MXene composites; electrocatalysis; supercapacitors; Alkaline water electrolyzers
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Guest Editor
School of Chemical Engineering, Yeungnam University, Gyeongsan 38541, Republic of Korea
Interests: nanomaterials; materials chemistry; supercapacitors; batteries
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Supercapacitors are emerging as a highly efficient technology among various energy storage solutions since these devices can store electrical charge in an electric double layer at the interface of an electrode and electrolyte. The global supercapacitor market is expected to reach an estimated $1.5 billion by 2028 with a CAGR of 14.5% from 2023 to 2028. Moreover, this is projected to double in the coming years due to increasing demand. In recent years, various specialized electrode materials have been developed to create high-performance supercapacitors with improved energy density, cycling stability, and capacitance, and diverse synthetic methods have been devised to produce different types of supercapacitors, including flexible, wearable, hybrid, and micro-supercapacitors. It is anticipated that these supercapacitor devices will have a significant impact on the electronics industry in the near future.

This open access Special Issue aims to compile original research, mini-reviews, research prospects, and comprehensive state-of-the-art studies on the latest advancements in supercapacitor technologies. The focus will be on novel synthetic approaches, innovative electrode materials, and unique device fabrication techniques for supercapacitor applications. The primary objective of this Special Issue is to present the most recent cutting-edge innovations in supercapacitor technologies and researchers are encouraged to submit their work related to the synthesis strategies and fabrication techniques of supercapacitors.

Topics covered:

  1. Metal oxide/sulfide-based nanocomposites;
  2. Two-dimensional layered double hydroxide composites;
  3. Spinel perovskite nanocomposites;
  4. Polymer matrix nanocomposites;
  5. Carbon nanotube composites;
  6. Mixed metal oxide nanocomposites.

Dr. Karthik Kannan
Dr. Sriram Ganesan
Guest Editors

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Keywords

  • supercapacitors
  • alkaline hybrid zinc batteries
  • lithium-ion batteries
  • lithium-air batteries
  • film capacitors

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Published Papers (2 papers)

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Research

17 pages, 8501 KiB  
Article
Investigation of the Electrochemical Behavior of CuO-NiO-Co3O4 Nanocomposites for Enhanced Supercapacitor Applications
by Karthik Kannan, Karuppaiya Chinnaiah, Krishnamoorthy Gurushankar, Raman Krishnamoorthi, Yong-Song Chen, Paskalis Sahaya Murphin Kumar and Yuan-Yao Li
Materials 2024, 17(16), 3976; https://doi.org/10.3390/ma17163976 - 10 Aug 2024
Viewed by 375
Abstract
In the present study, composites incorporating NiO-Co3O4 (NC) and CuO-NiO-Co3O4 (CNC) as active electrode materials were produced through the hydrothermal method and their performance was investigated systematically. The composition, formation, and nanocomposite structure of the fabricated material [...] Read more.
In the present study, composites incorporating NiO-Co3O4 (NC) and CuO-NiO-Co3O4 (CNC) as active electrode materials were produced through the hydrothermal method and their performance was investigated systematically. The composition, formation, and nanocomposite structure of the fabricated material were characterized by XRD, FTIR, and UV–Vis. The FE-SEM analysis revealed the presence of rod and spherical mixed morphologies. The prepared NC and CNC samples were utilized as supercapacitor electrodes, demonstrating specific capacitances of 262 Fg−1 at a current density of 1 Ag−1. Interestingly, the CNC composite displayed a notable long-term cyclic stability 84.9%, which was observed even after 5000 charge–discharge cycles. The exceptional electrochemical properties observed can be accredited to the harmonious effects of copper oxide addition, the hollow structure, and various metal oxides. This approach holds promise for the development of supercapacitor electrodes. These findings collectively indicate that the hydrothermally synthesized NC and CNC nanocomposites exhibit potential as high-performance electrodes for supercapacitor applications. Full article
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12 pages, 2761 KiB  
Article
CVD Grown CNTs-Modified Electrodes for Vanadium Redox Flow Batteries
by Yi-Sin Chou, Nitika Devi, Yan-Ting Lin, Amornchai Arpornwichanop and Yong-Song Chen
Materials 2024, 17(13), 3232; https://doi.org/10.3390/ma17133232 - 1 Jul 2024
Viewed by 526
Abstract
Vanadium redox flow batteries (VRFBs) are of considerable importance in large-scale energy storage systems due to their high efficiency, long cycle life and easy scalability. In this work, chemical vapor deposition (CVD) grown carbon nanotubes (CNTs)-modified electrodes and Nafion 117 membrane are utilised [...] Read more.
Vanadium redox flow batteries (VRFBs) are of considerable importance in large-scale energy storage systems due to their high efficiency, long cycle life and easy scalability. In this work, chemical vapor deposition (CVD) grown carbon nanotubes (CNTs)-modified electrodes and Nafion 117 membrane are utilised for formulating a vanadium redox flow battery (VRFB). In a CVD chamber, the growth of CNTs is carried out on an acid-treated graphite felt surface. Cyclic voltammetry of CNT-modified electrode and acid-treated electrode revealed that CNTs presence improve the reaction kinetics of V3+/V2+ and VO2+/VO2+ redox pairs. Battery performance is recorded for analysing, the effect of modified electrodes, varying electrolyte flow rates, varying current densities and effect of removing the current collector plates. CNTs presence enhance the battery performance and offered 96.30% of Coulombic efficiency, 79.33% of voltage efficiency and 76.39% of energy efficiency. In comparison with pristine electrodes, a battery consisting CNTs grown electrodes shows a 14% and 15% increase in voltage efficiency and energy efficiency, respectively. Battery configured without current collector plates performs better as compared to with current collector plates which is possibly due to decrease in battery resistance. Full article
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