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New trends in nanoscale compounds for energy storage

Stotsko Z. A., Venhryn B.Ya.

Journal of Achievements in Materials and Manufacturing Engineering

2012

Vol. 54, nr 2

227--232

Purpose: Mechanism of supramolecular complexes C formation and investigation of their electrochemical characteristics were the aim of this paper. Supramolecular complexes were created by inserting an organic receptor into nano/mesopores of activated carbon. Design/methodology/approach: Electrochemical studies of supramolecular complexes C were carried out by means of impedance spectroscopy, cyclic voltammetry and galvanostatic cycling. Findings: The possibility to combine the capacitive storage with faradaic energy generation in one unit is proved. It can be reached by means of active electrode formation as a supramolecular complex C. It is shown that faradaic generation of energy occurs at low positive potentials, whereas the capacitive one at higher potentials. Method of synthesis of blue graphite is developed. Research limitations/implications: This research is a complete and accomplished work. Practical implications: Supramolecular complexes, obtained in this work, could be regarded as promising electrode materials in devices of energy generation, storage and transformation. Originality/value: This work is of urgent importance for physics and chemistry of energy generation, storage and transformation, because it opens new possibilities to new highly effective electrode materials search and enables to reach a high values of functional characteristics.

Supramolecular complexes C<18-crown-ether-6> and their application in devices for energy generation, storage and transformation

Venhryn B., Stotsko Z., Grygorchak I., Mudry S., Balaban O.

Archives of Materials Science and Engineering

2011

Vol. 52, nr 1

18-22

Purpose: Formation of supramolecular complexes C<18-crown-ether-6> and investigation of their electrochemical characteristics was the aim of this paper. An organic receptor is inserted in nano/mesopores of activated carbon of these supramolecular complexes. Design/methodology/approach: Electrochemical studies of supramolecular complexes C<18-crown-ether-6> were carried out by means of impedance spectroscopy, cyclic voltammetry and galvanostatic cycling. Findings: It is shown that Faraday generation of energy occurs at low positive potentials whereas the capacitive storage - at higher potentials. As result the value of specific capacitance for AC of faradaic process 10000 F/g was reached as well as 154 F/g of non-faradaic process, whereas the same parameters for BAC equal 13350 F/g and 80 F/g, respectively. Research limitations/implications: This research is a complete and accomplished work. Practical implications: Supramolecular complexes, obtained in this work, could be regarded as promising electrode materials in devices of energy generation, storage and transformation. Originality/value: This work is of urgent importance for physics and chemistry of energy generation, storage and transformation, because it opens new possibilities to new highly effective electrode materials search and enables to reach a high values of functional characteristics.