GIYANTO; AFFI, Jon; GUNAWARMAN; HANDAYANI, Murni; YETRI, Yuli. Utilization of Coconut Shells as a Source of Graphene Nanosheets Fe/N-GNS for Environmentally Friendly Primary Battery Electrodes. Piston: Journal of Technical Engineering, [S. l.], v. 9, n. 2, p. 85–89, 2026. DOI: 10.32493/pjte.v9i2.57488. Disponível em: https://openjournal.unpam.ac.id/index.php/Piston/article/view/57488. Acesso em: 29 mar. 2026.