Open AccessAccumulation charge mechanisms in electrochemical systems formed based on activated carbon and manganese oxide
Author(s) -
B. K. Ostafiychuk,
M. I. Kolkovskyi,
B.І. Rachiy,
P. I. Kolkovskyi,
N.Ya. Ivanichok,
R. V. Ilnitsky
Publication year - 2020
Publication title -
fìzika ì hìmìâ tverdogo tìla
Language(s) - English
Resource type - Journals
eISSN - 2309-8589
pISSN - 1729-4428
DOI - 10.15330/pcss.21.1.19-34
Subject(s) - supercapacitor , capacitance , manganese , electrolyte , activated carbon , electrochemistry , cyclic voltammetry , materials science , carbon fibers , electrode , manganese oxide , capacitor , oxide , chemical engineering , electrolytic capacitor , inorganic chemistry , chemistry , voltage , composite material , metallurgy , electrical engineering , composite number , organic chemistry , adsorption , engineering
In this work, the porous structure of the carbon material and the crystalline structure of manganese oxide α - modification (α - MnO2) have been investigated. The electrochemical performance of symmetric and asymmetric supercapacitors (α - MnO2 / Activated carbon) was investigated by cyclic voltammetry and galvanostatic cycling methods. The processes occur mainly at the electrode – electrolyte interface have been analyzed. It was determined that at discharge currents of 0.5 - 5 mA, the specific capacitance value for the α - MnO2 / Activated carbon hybrid capacitor exceeds the value of the symmetric capacitor by 45 - 55 % under the same conditions.