Influence of Synthesis Conditions on the Capacitance Performance of Hydrothermally Prepared MnO 2 for Carbon Xerogel-Based Solid-State Supercapacitors. - Ilcheva, Vania; Boev, Victor; Dimitrova, Mariela; Mladenova, Borislava; Karashanova, Daniela; Lefterova, Elefteria; Rey-Raap, Natalia; Arenillas, Ana; Stoyanova, Antonia (Gels (2310-2861), 2025)