Piwek, J. Slesinski, A. Fic, K. Aina, S. Vizintin, A. Tratnik, B. Tchernychova, E. Lobera, M. P. Bernechea, M. Dominko, R. Frackowiak, E. High frequency response of adenine-derived carbon in aqueous electrochemical capacitor Electrochim. acta 10.1016/j.electacta.2022.140649 2022 2022