Vertically-aligned Co(OH)2 Nanosheet Films for Flexible All-solid-state Electrochemical Supercapacitor

[摘要] Vertically-aligned Co(OH)2nanosheets were cathodically electrodeposited on a piece of gold coated polyethylene terephthalate (Au-PET) as an electrode material for supercapacitor. The Co(OH)2electrode showed a high capacitance of 2695 F g-1at 8 A g-1in 1 M KOH aqueous electrolyte. Besides, the films were employed to assemble symmetric all-solid-state supercapacitors with PVA/LiCl gel served as solid electrolyte. The device exhibits an areal capacitance of 50.5 μF cm-2at the current density of 2 μA cm-2accompanied by excellent cycle stability.

[发布机构] College of Science, Hohai University, Nanjing; 210098, China^1

[效力级别] 生态环境科学

[关键词] All-solid state;All-solid-state supercapacitors;Aqueous electrolyte;Cycle stability;Electrochemical supercapacitor;Electrode material;Nanosheet films;Vertically aligned