Electrochemical Energy Conversion and Storage Device Based on Symmetrical Electrode Materials

A special issue of Symmetry (ISSN 2073-8994). This special issue belongs to the section "Chemistry: Symmetry/Asymmetry".

Deadline for manuscript submissions: closed (31 July 2023) | Viewed by 1136

Special Issue Editors


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Guest Editor
Center for Advanced Materials Research, Advanced Research Institute of Natural Sciences, Beijing Normal University, Zhuhai 519087, China
Interests: lithium air batteries; inorganic functional materials
Center for Advanced Materials Research, Advanced Research Institute of Natural Sciences, Beijing Normal University, Zhuhai 519087, China
Interests: small molecule electrocatalysis; defect chemistry; spintronics; high-performance energy storage devices

Special Issue Information

Dear Colleagues,

Environmental and energy issues have become increasingly prominent, making the demand for electrochemical energy conversion and storage devices urgent, such as the application of Li-ion batteries, and supercapacitors in portable electronic devices and electric vehicles, as well as the preparation of renewable clean energy and high value-added chemicals via electrolytic water and electrolytic mixed water systems. The research of symmetrical electrode materials first began in supercapacitors; there is relatively litte research into Li-ion battery and electrocatalysis systems. Symmetrical electrode materials, that is, those in the same system, the same active electrode materials can be used for both cathode and anode. Because of this characteristic, the symmetrical electrochemical system with symmetrical electrode material as cathode and anode has incomparable advantages, such as weakening the changes of device volume expansion and contraction and simplifying and reducing the production process and cost. The development of high-performance symmetrical electrode materials plays an important role in promoting the further application of electrochemical energy conversion and storage devices.

Dr. Mengwei Yuan
Dr. Zemin Sun
Guest Editors

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Keywords

  • symmetrical electrode materials
  • bifunctional electrode materials
  • battery
  • supercapacitors
  • electrolytisis

Published Papers (1 paper)

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Research

18 pages, 6523 KiB  
Article
Fomes fomentarius as a Bio-Template for Heteroatom-Doped Carbon Fibers for Symmetrical Supercapacitors
by Daria Chernysheva, Maksim Konstantinov, Ekaterina Sidash, Tatiana Baranova, Victor Klushin, Denis Tokarev, Veronica Andreeva, Evgeny Kolesnikov, Vasily Kaichev, Mikhail Gorshenkov and Nina Smirnova
Symmetry 2023, 15(4), 846; https://doi.org/10.3390/sym15040846 - 1 Apr 2023
Cited by 4 | Viewed by 1441
Abstract
Nowadays, commercial electric double-layer supercapacitors mainly use porous activated carbons due to their high specific surface area, electrical conductivity, and chemical stability. A feature of carbon materials is the possibility of obtaining them from renewable plant biomass. In this study, fungi (Fomes [...] Read more.
Nowadays, commercial electric double-layer supercapacitors mainly use porous activated carbons due to their high specific surface area, electrical conductivity, and chemical stability. A feature of carbon materials is the possibility of obtaining them from renewable plant biomass. In this study, fungi (Fomes fomentarius) were used as a bio-template for the preparation of carbon fibers via a combination of thermochemical conversion approaches, including a general hydrothermal pre-carbonization step, as well as subsequent carbonization, physical, or chemical activation. The relationships between the preparation conditions and the structural and electrochemical properties of the obtained carbon materials were determined using SEM, TEM, EDAX, XPS, cyclic voltammetry, galvanostatic measurements, and EIS. It was shown that hydrothermal pretreatment in the presence of phosphoric acid ensured the complete removal of inorganic impurities of raw fungus hyphae, but at the same time, saved some heteroatoms, such as O, N, and P. Chemical activation using H3PO4 increased the amount of phosphorus in the carbon material and saved the natural fungus’s structure. The combination of a hierarchical pore structure with O, N, and P heteroatom doping made it possible to achieve good electrochemical properties (specific capacitance values of 220 F/g) and excellent stability after 25,000 charge/discharge cycles in a three-electrode cell. The electrochemical performance in both three- and two-electrode cells exceeded or was comparable to other biomass-derived porous carbons, making it a prospective candidate as an electrode material in symmetrical supercapacitors. Full article
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