Facile preparation and sulfidation analysis for activated multiporous carbon@NiCo2S4 nanostructure with enhanced supercapacitive properties. (1st September 2016)

• Record Type: Journal Article
• Authors: Wang, Tian; Le, Qiujian; Zhang, Guodong; Zhu, Shijin; Guan, Bo; Zhang, Junming; Xing, Shuangxi; Zhang, Yuxin
• Is Part Of: Electrochimica acta. Volume 211(2016)
• Page Start: 627
• Page End: 635
• Publication Date: 2016-09-01
• Subjects: NiCo2S4 -- Sulfidation -- Nanocomposites -- Energy storage -- Supercapacitor; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2016.06.082
• Languages: English
• ISSNs: 0013-4686

Abstract

Graphical abstract: Highlights: Activated multiporous carbon (AMC)@nickel cobalt sulfide nanostructure: self-assembly. Analysis on sulfidation impact on structural and electrochemical change. High specific capacitance of AMC@NiCo2 S4 : 651.1 F g −1 at 0.6 A g −1 . Good rate property of AMC@NiCo2 S4 : 88.1% retention. Excellent cycling stability of AMC@NiCo2 S4 : 87.4% retention after 2000 cycles. Abstract: A facile two-step hydrothermal method is modified to synthesize NiCo2 S4 nanosheets on activated multiporous carbon (AMC) for application in supercapacitors. The structure and performance of both NiCo2 S4 and the intermediate product, i.e. NiCo2 O4 on AMC are investigated in detail to clarify the effect of the sulfidation treatment. Owing to the high electronic conductivity of NiCo2 S4, the unique designed nanostructure exhibits a high specific capacitance (651.1 F g −1 at 0.6 A g −1 ), good rate performance (88.1% retention for current increases around 17 times) and excellent cycling stability (87.4% retention after 2000 cycles). These results suggest this hybrid composite to be a promising electrode material for high-performance supercapacitors and the rational fabrication provides an approach to improve the electrochemical energy storage for other transition metal sulfides and oxides.