Size effects at ultrasonic treatment of nanoporous carbon and improved characteristics of supercapacitors on its base - O. V. Balaban; Ya. Venhryn; I. I. Grygorchak; S. I. Mudry; Yu. O. Kulyk; B. I. Rachiy; R. P. Lisovskiy (Nanosystems, nanomaterials, nanotechnologies, 2014)