Significantly improved conductivity of spinel Co3O4 porous nanowires partially substituted by Sn in tetrahedral sites for high-performance quasi-solid-state supercapacitors

The partial substitution of Sn in spinel-structured Co₃O₄ exhibits excellent electrochemical performance, including good electrical conductivity, high energy density, power density and cycling retention, as a positive electrode for supercapacitors.