T. N. Ostaninaa,*, V. M. Rudoia, V. S. Nikitina,**, A. B. Darintsevaa,
O. L. Zalesovaa, and N. M. Porotnikovab,***
aUral Federal University, ul. Mira 19, Yekaterinburg, 620002 Russia
bInstitute of High-Temperature Electrochemistry, Ural Branch, Russian Academy of Sciences,
ul. S. Kovalevskoi 22, Yekaterinburg, 620219 Russia
*e-mail: ostni@mail.ru
**e-mail: nikitin-viachieslav@mail.ru
***e-mail: n.porotnikova@mail.ru
Received November 14, 2013; accepted for publication December 9, 2013
Abstract—The area of dendritic deposits of zinc deposits prepared by electrolysis from zincate electrolyte,
which contained 0.3 mol/dm3 ZnO and 4 mol/dm3 NaOH, is determined. The application of electrochemical
methods has made it possible to measure the in situ surface without removing the dendrite deposit from the cath-
ode. The specific deposit surface found using chronopotentiometry is 0.144 ± 0.002 m2/g, while according to the
result of impedance spectroscopy it is 11.61 ± 0.14 m2/g. The surface of powders prepared from dendrite depos-
its is 21.26 ± 0.62 m2 according to the data of the BET method. It is shown that the difference in these values
is associated with the resolving ability of methods applied. It is established that the surface of dendritic deposits
possesses fractal properties. The fractal dimension of the specific surface is calculated and the results of mea-
surements performed by different methods are compared using the scaling relationship.
Keywords: dendrites, zinc, specific surface, fractal dimension, chronopotentiometry, impedance spectro-scopy
DOI: 10.3103/S1067821216010120
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