Wearable superhigh energy density supercapacitors using a hierarchical ternary metal selenide composite of CoNiSe 2 microspheres decorated with CoFe 2 Se 4 nanorods

A composite of hierarchical CoNiSe 2 (CNS) microspheres decorated with a CoFe 2 Se 4 (CFS) nanorod-like architecture was successfully synthesized and the assembled symmetric supercapacitor achieves a superhigh energy density.