Prototype Profile of Supercapactors with Activated Carbon/Fe3O4 Electrodes Natural Materials and Celgard Li-Ion Battery SeparatorsLydia Rohmawati, Damini Alfarisi, Sitiv Holisa SP, Woro Setyarsih, Tukiran and Ahmad SubhanE3S Web Conf., 328 (2021) 02012DOI: https://doi.org/10.1051/e3sconf/202132802012