Amorphous deacetylated chitosan nanofiber supercapacitors M. Fukuhara, T. Yokotsuka, Y. Omura, T. Yoneda, T. Toda and T. Hashida EPL, 151 2 (2025) 26004 Published online: 14 August 2025 DOI: 10.1209/0295-5075/aded31