A zipper-like NiCo2O4/Ni(OH)(2) growing on multifunctional nickel foam with excellent capacitive performance

摘要

The increased needs for sustainable energy storage devices make it urgent to develop novel supercapacitor electrode materials. An ingenious zipper-like NiCo2O4/Ni(OH)(2) composite has been successfully grown on nickel foam via a one-pot hydrothermal method free of any template or catalyst. Owing to its close contact with the substrate, its distinguished zipper-like structure and unique ingredients, the specific capacitance of NiCo2O4/Ni(OH)(2) was as high as 2721 mF cm(-2) at 1 mA cm(-2); 2161 mF cm(-2) was obtained even at 50 mA cm(-2); and it retained 86% capacity after 10000 cycles. The facile synthesis method and remarkable capacitive performance of the zipper-like NiCo2O4/Ni(OH)(2) make it attractive for supercapacitor applications. (C) 2019 Elsevier B.V. All rights reserved.