Utjecaj temperature predobrade na elektrokemijska svojstva hidratiziranog RuO2 (CROSBI ID 577858)
Prilog sa skupa u zborniku | sažetak izlaganja sa skupa
Podaci o odgovornosti
Sopčić, Suzana ; Kiseljak ; Marija ; Mandić, Zoran ; Kraljić Roković, Marijana
hrvatski
Utjecaj temperature predobrade na elektrokemijska svojstva hidratiziranog RuO2
The electrochemical reaction of ruthenium oxide exhibits a capacitive-like behavior, which means that it achieves high currents over a wide potential range. It also has very reversible and reproducible electrochemical behavior, the capability to store very high charge and to release it fast enough upon demand as well as capability to be oxidized and reduced several thousands times without significant chemical or mechanical change. Because of these properties, ruthenium oxide has potential applications as an electrode material in supercapacitors. The overall charging/discharging reaction of ruthenium oxide can be generally represented by equation [1]: RuOx(OH)y + ze- + zH+ -----> RuOx-z(OH)y+z Pseudocapacitance reaction of hydrous ruthenium oxide was investigated by cyclic voltammetry combined with electrochemical quartz-crystal microbalance (EQCM) in H2SO4 and Na2SO4 electrolyte solutions. The ruthenium oxide electrode was prepared by attaching the ruthenium oxide particles on gold covered quartz electrode and was heated at various temperatures. From given reaction it can be concluded that both electronic conductivity and proton availability are necessary for good performance of ruthenium oxide in supercapacitor applications. These two conductivities were regulated by temperature pre- treatment of hydrous ruthenium oxide. The results show that there are at least three different processes taking place simultaneously during the redox reaction of ruthenium oxide electrode, but their contribution vary depending on the electrolyte used, temperature pre-treatment and potential range. The influence of the annealing temperatures on the characteristics of the redox reaction of hydrous ruthenium oxide as well as on its capacitance was confirmed.
RuO2; Superkondenzator; EQCN; utjecaj temperature
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engleski
Effect of the temperature pre-treatment on electrochemical properties of hydrous RuO2
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RuO2; Supercapacitors; EQCN; Temperature effect
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Podaci o prilogu
283-283.
2011.
objavljeno
Podaci o matičnoj publikaciji
XXII. Hrvatski skup kemičara i kemijskih inženjera - Knjiga Sažetaka
Tomašić, Vesna ; Maduna Valkaj, Karolina
Zagreb:
978-953-6894-42-0
Podaci o skupu
XXII.Hrvatski skup kemičara i kemijskih inženjera
poster
13.02.2011-16.02.2011
Zagreb, Hrvatska