Aqueous electrochemical energy storage system based on phenanthroline- and anthraquinone-modified carbon electrodes

This manuscript reports the electrochemical behaviour of electrochemical energy storage system based on carbon-based electrodes modified with phenanthroline and anthraquinone molecules, respectively. The composite electrodes consist of activated carbon powder modified with phenanthroline or anthraqu...

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Bibliographic Details
Published inElectrochimica acta Vol. 390; p. 138862
Main Authors Amiri, Mona, Shul, Galyna, Donzel, Nicolas, Bélanger, Daniel
Format Journal Article
LanguageEnglish
Published Oxford Elsevier Ltd 10.09.2021
Elsevier BV
Elsevier
Subjects
Activated carbon
Anthraquinone
Anthraquinones
Aqueous electrolyte
Carbon
Chemical Sciences
Electrochemical analysis
Electrochemical energy storage
Electrode polarization
Electrodes
Electrolytes
Energy storage
Infrared analysis
Infrared spectroscopy
Phenanthroline
Photoelectrons
Redox active electrode
Silver chloride
Sulfuric acid
Thermogravimetric analysis
Anthraquinone
Phenanthroline
Aqueous electrolyte
Redox active electrode
Electrochemical energy storage
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Summary:This manuscript reports the electrochemical behaviour of electrochemical energy storage system based on carbon-based electrodes modified with phenanthroline and anthraquinone molecules, respectively. The composite electrodes consist of activated carbon powder modified with phenanthroline or anthraquinone molecules by the diazonium chemistry. The phenanthroline-modified carbon used to prepare the composite electrode was characterized by elemental analysis, X-ray photoelectron spectroscopy, thermogravimetric analysis coupled to infrared spectrometry, and nitrogen gas adsorption. Phenanthroline-modified carbon composite electrode exhibited redox activity in aqueous acidic electrolyte around 0.4 V vs. Ag/AgCl. Consequently, it was used as positive electrode in electrochemical energy storage system with an anthraquinone-modified carbon negative electrode. Pre-polarization of both electrodes was needed to take full advantage of the charge storage properties of the grafted species and to reach the potential range of their redox activity upon charge/discharge cycling. This pre-treatment also enabled an increase of the operating voltage cell to 1.0 V in aqueous 1 M H2SO4 electrolyte.
ISSN:0013-4686
1873-3859
DOI:10.1016/j.electacta.2021.138862