Ostafiychuk, B. K.; Kolkovskyi, M. I.; Rachiy, B. I.; Kolkovskyi, P. I.; Ivanichok, N. Y.; Ilnitsky, R. V. Accumulation Charge Mechanisms in Electrochemical Systems Formed Based on Activated Carbon and Manganese Oxide. Phys. Chem. Sol. State 2020, 21, 27-34.