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Ion dynamics in the pseudocapacitive reaction of hydrous ruthenium oxide. Effect of the temperature pre-treatment (CROSBI ID 175744)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Sopčić, Suzana ; Mandić, Zoran ; Inzelt, György ; Kraljić Roković, Marijana ; Meštrović, Ernest Ion dynamics in the pseudocapacitive reaction of hydrous ruthenium oxide. Effect of the temperature pre-treatment // Journal of power sources, 196 (2011), 10; 4849-4858. doi: 10.1016/j.jpowsour.2011.01.070

Podaci o odgovornosti

Sopčić, Suzana ; Mandić, Zoran ; Inzelt, György ; Kraljić Roković, Marijana ; Meštrović, Ernest

engleski

Ion dynamics in the pseudocapacitive reaction of hydrous ruthenium oxide. Effect of the temperature pre-treatment

Pseudocapacitive redox reaction of hydrous ruthenium oxide was investigated by the combined electrochemical and quartz crystal nanobalance measurements on gold support in H2SO4 and Na2SO4 solutions. The results show that the pseudocapacitance arises from at least two different Faradaic reactions with significant influence of double layer capacitance. All three processes simultaneously take place during charging/discharging reaction, but their contribution vary depending on the electrolyte used, the temperature pre-treatment and on the potential range. One Faradaic reaction releases protons during oxidation reaction resulting in the electrode mass decrease, while another Faradaic reaction results in the chemical binding of water leading to the mass gain during the oxidation reaction. The former reaction is favoured in acidic electrolyte and at lower anodic potentials, and the latter reaction proceeds predominantly in neutral media and at higher anodic potentials. The influence of annealing temperatures on the characteristics of the redox reaction of hydrous ruthenium oxide, as well as on its capacitance, was confirmed. It was demonstrated that specific capacitances of hydrous ruthenium oxide could achieve values as high as 1500 F g−1, provided that conditions of good electronic conductivity among RuO2 particles, as well as good electrical contact between gold and RuO2, are met.

RuO2 ; supercapacitors ; EQCN ; temperature effect

nije evidentirano

nije evidentirano

nije evidentirano

nije evidentirano

nije evidentirano

nije evidentirano

Podaci o izdanju

196 (10)

2011.

4849-4858

objavljeno

0378-7753

1873-2755

10.1016/j.jpowsour.2011.01.070

Povezanost rada

Kemija, Kemijsko inženjerstvo

Poveznice
Indeksiranost