Elucidating Mn²⁺/Mn³⁺ and Ni⁰/Ni²⁺ Redox Synergy in Hair-Derived Carbon-Supported Ag/Ni-MnO_<i>x</i> Supercapacitor.

ABSTRACT: Despite their critical importance, developing sustainable high-performance supercapacitor (SC) electrodes with long-term stability poses significant challenges. Herein, we report a novel ternary composite electrode in which Ag/Ni-doped manganese oxide (Ag/NiO_x@Mn_yO_z) is supported on human hair-derived activated carbon (HHC). This composite is synthesized via a one-pot hydrothermal process followed by thermal annealing at 800 °C, a strategy that creates a conductive Ag/Ni bimetallic network and abundant oxygen vacancies in the NiO_x and Mn_yO_z phases. During operation, operando X-ray absorption spectroscopy (XAS) confirms reversible dual-ion redox transitions (Mn²⁺/Mn^3+<

SUBMITTER: Sanni A 

PROVIDER: S-EPMC12371695 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature