Wearable superhigh energy density supercapacitors using a hierarchical ternary metal selenide composite of CoNiSe2 microspheres decorated with CoFe2Se4 nanorods

A composite of hierarchical CoNiSe₂ (CNS) microspheres decorated with a CoFe₂Se₄ (CFS) nanorod-like architecture was successfully synthesized and the assembled symmetric supercapacitor achieves a superhigh energy density.