Table of Content

Renewable and Green Materials for Supercapacitors

Submission Deadline: 01 June 2023 Submit to Special Issue

Guest Editors

Jitao Li, School of Precision Instruments and Opto-Electronics Engineering, Tianjin University, China.

Dr. Jitao Li is interested in energy technologies (solar cell, power battery, supercapacitor, etc.) and optoelectronic technologies. In these fields, He has released more than 80 achievements including research papers and invention patents, and reviewed at least 80 manuscripts for over 20 journals. He has been appointed as editorial board member and reviewer board member for several international journals.

Dingyu Yang, Professor, Chengdu University of Information Technology, China.

Dr. Dingyu Yang is Academic Candidate Leader of Sichuan Province, and director of Youth Federation of Sichuan Science and Technology, China. He has been engaged in teaching and scientific research in the field of semiconductor materials and new energy technology for a long time, focusing on broadband gap photodetectors, high-efficiency thin-film solar cells and new energy storage devices. He has published over 100 journal papers and hosted more than 10 national and provincial research projects.

Summary

The excessive use of fossil fuels has caused serious environment pollution. The growing contradiction between energy demand and environmental issues has led to the research and development of efficient, clean and sustainable energy storage and conversion technologies. As a new type of energy storage device between electrolytic capacitors and secondary batteries, supercapacitors have attracted much attention for their high power density, rapid charge and discharge, and long cycle life. Nevertheless, most materials for supercapacitors are not really environment-friendly due to some shortcomings. 1) Most materials are not renewable, and the irreversible resource consumption is particularly unfavorable for those with scarce raw materials, e.g., precious metal oxides (RhO, IrO, etc.) used as electrode materials. 2) Some non-green materials are applied, such as acetonitrile with toxicity, an organic compound used as electrolyte, which causes unavoidable secondary environmental pollution from waste supercapacitors. Meanwhile, 3) the preparation process of some materials is non-green, although these materials themselves may be environmental-friendly, for instance, when graphene oxidized by strong oxidant is used to prepare graphene electrode, the reducing agent used may be highly toxic.


Currently, developing renewable materials (e.g., renewable lignin as electrolytes) and green materials are expected to deal with the future environmental problems caused by energy storage devices. Therefore, the Special Issue is proposed to discuss the advances in renewable materials and green materials for supercapacitors, which will contribute innovation strategies for development of supercapacitors. The scope of interests includes but is not limited to the following topics:


1) Renewable materials for supercapacitors,

2) Recyclability of materials for supercapacitors,

3) Green preparation of materials for supercapacitors,

4) Non-toxic or low-toxic materials for supercapacitors,

5) Other pollution-free materials for supercapacitors.


Keywords

Supercapacitors, Renewable materials, Green materials, Clean energy, Environment-friendly

Published Papers


  • Open Access

    ARTICLE

    N-Doped rGO-Like Carbon Prepared from Coconut Shell: Structure and Specific Capacitance

    Imam Khambali, Budhi Priyanto, Retno Asih, Malik Anjelh Baqiya, Muhammad Mahyiddin Ramli, Nurul Huda Osman, Sarayut Tunmee, Hideki Nakajima, Triwikantoro, Mochamad Zainuri, Darminto
    Journal of Renewable Materials, Vol.11, No.4, pp. 1823-1833, 2023, DOI:10.32604/jrm.2023.025026
    (This article belongs to this Special Issue: Renewable and Green Materials for Supercapacitors)
    Abstract An rGO−like carbon compound has been synthesized from biomass, i.e., old coconut shell, by a carbonization process followed by heating at 400°C for 5 h. The nitrogen doping was achieved by adding the urea (CH4N2O) and stirring at 70°C for 14 h. The morphology and structure of the rGO-like carbon were investigated by electron microscopies and Raman spectroscopy. The presence of C-N functional groups was analyzed by Fourier transform infrared and synchrotron X-ray photoemission spectroscopy, while the particle and the specific capacitance were measured by particle sizer and cyclic voltammetry. The highest specific capacitance of 72.78 F/g is achieved by… More >

    Graphic Abstract

    N-Doped rGO-Like Carbon Prepared from Coconut Shell: Structure and Specific Capacitance

  • Open Access

    ARTICLE

    Preparation of Eco-Friendly High-Performance Manganese Dioxide Supercapacitors by Linear Sweep Voltammetry

    Junshan Zhao, Yihan Shi, Ming Zhang, Liu Zhang, Xumei Cui, Xinghua Zhu, Jitong Su, Dandan Jing, Dingyu Yang
    Journal of Renewable Materials, Vol.11, No.1, pp. 79-91, 2023, DOI:10.32604/jrm.2023.022030
    (This article belongs to this Special Issue: Renewable and Green Materials for Supercapacitors)
    Abstract In this paper, the non-polluting, non-toxic, and eco-friendly material-MnO2 electrodes were deposited on three-dimensional porous nickel (Ni) foam by linear sweep voltammetry, and the entire electrodeposition process did not require sintering of the material, which was fast and convenient while avoiding unnecessary energy consumption and thus was environmentally friendly. Scanning electron microscopy (SEM) and transmission electron microscopy were used to examine the surface and microscopic characteristics of each sample (TEM). Chronoamperometry (CA), cyclic voltammetry (CV), galvanostatic charge/discharge (GCD), and electrochemical impedance spectroscopy (EIS) were then used to determine the electrochemical characteristics of the manufactured samples. The result suggests that the… More >

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