One-step hydrothermal synthesis of 3D petal-like Co9S8/RGO/Ni3S2 composite on nickel foam for high-performance supercapacitors

Zhuomin Zhang; Qian Wang; Chongjun Zhao; Shudi Min; Xiuzhen Qian

doi:10.1021/am5088192

One-step hydrothermal synthesis of 3D petal-like Co9S8/RGO/Ni3S2 composite on nickel foam for high-performance supercapacitors

ACS Appl Mater Interfaces. 2015 Mar 4;7(8):4861-8. doi: 10.1021/am5088192. Epub 2015 Feb 20.

Authors

Zhuomin Zhang¹, Qian Wang, Chongjun Zhao, Shudi Min, Xiuzhen Qian

Affiliation

¹ Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology , Meilong Road 130, Shanghai 200237, P.R. China.

PMID: 25689800
DOI: 10.1021/am5088192

Abstract

Co9S8, Ni3S2, and reduced graphene oxide (RGO) were combined to construct a graphene composite with two mixed metal sulfide components. Co9S8/RGO/Ni3S2 composite films were hydrothermal-assisted synthesized on nickel foam (NF) by using a modified "active metal substrate" route in which nickel foam acted as both a substrate and Ni source for composite films. It is found that the Co9S8/RGO/Ni3S2/NF electrode exhibits superior capacitive performance with high capability (13.53 F cm(-2) at 20 mA cm(-2), i.e., 2611.9 F g(-1) at 3.9 A g(-1)), excellent rate capability, and enhanced electrochemical stability, with 91.7% retention after 1000 continuous charge-discharge cycles even at a high current density of 80 mA cm(-2).

Keywords: Co9S8/RGO/Ni3S2 composites; Ni foam; chemical redox; hydrothermal method; supercapacitor.

Publication types

Research Support, Non-U.S. Gov't