A 3D petal-like Ni3S2/CoNi2S4 hybrid grown on Ni foam as a binder-free electrode for energy storage. Issue 8 (21st June 2018)

• Record Type: Journal Article
• Authors: Chen, Fangshuai; Wang, Hui; Ji, Shan; Linkov, Vladimir; Wang, Rongfang
• Is Part Of: Sustainable energy & fuels. Volume 2:Issue 8(2018)
• Page Start: 1791
• Page End: 1798
• Publication Date: 2018-06-21
• Subjects: Renewable energy sources -- Periodicals; Fuel cells -- Periodicals; Electric batteries -- Periodicals; Electrochemistry -- Periodicals; 660.297
• DOI: 10.1039/c8se00130h
• Languages: English
• ISSNs: 2398-4902

Abstract

Abstract : A 3D petal-like Ni3 S2 /CoNi2 S4 hybrid directly grown on Ni foam as a binder-free electrode is synthesized via a single step solvothermal method. Abstract : In this study, a simple and one-pot synthesis method is developed to prepare a three-dimensional petal-like Ni3 S2 /CoNi2 S4 hybrid material which can be used as a binder-free electrode in electrochemical energy storage. This material possesses a high areal capacity, such as 758 μA h cm −2 at a current density of 2 mA cm −2 . With a 20-fold current density increase, the as-prepared material retains 70% of its original capacity. Furthermore, an asymmetric supercapacitor is assembled by using the Ni3 S2 /CoNi2 S4 hybrid as the cathode and active carbon as the anode in a coin cell. This cell exhibits an outstanding areal power density of 31.212 mW cm −2 at an areal energy density of 0.288 mW h cm −2 and still retains a quite high areal power density of 3.876 mW cm −2 at an areal energy density of 0.364 mW h cm −2 . These results show that the 3D petal-like Ni3 S2 /CoNi2 S4 hybrid is a promising cathode material for practical application in energy storage.