In situ growth of NiCo 2 S 4 @Ni 3 V 2 O 8 on Ni foam as a binder-free electrode for asymmetric supercapacitors

A NiCo 2 S 4 @Ni 3 V 2 O 8 //AC asymmetric supercapacitor was successfully fabricated and it can deliver both high energy density and high power density.