Mesoporous Co0.85Se nanosheets supported on Ni foam as a positive electrode material for asymmetric supercapacitor

Mesoporous Co0.85Se nanosheets on Ni foam was prepared by a facile hydrothermal process, and the asymmetric supercapacitor (ASC) assembled with Mesoporous Co0.85Se nanosheets on Ni foam as positive material exhibits high energy density and prominent cycle stability.