Electrochemical reduction-induced oxygen vacancies and in-situ selenization strategies synergistically construct high-performance supercapacitors.

Supercapacitors encounter difficulties in terms of slow kinetics. The development of supercapacitors with fast reaction kinetics is a significant challenge. This work presents the synthesis ofnickel foam (NF)-supported CoMn layered double hydroxides (CoMn-LDH) and CoSe composites (O-CoMn-LDH@CoSe/NF) were synthesized using electrochemical reduction-induced oxygen vacancy (O) and in situ selenization strategies.