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Indexed by:期刊论文

Date of Publication:2014-03-05

Journal:COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS

Included Journals:SCIE、EI、Scopus

Volume:444

Page Number:26-32

ISSN No.:0927-7757

Key Words:Template-assisted method; SnO2 hollow sphere; Carbon-coated SnO2 hollow sphere (SnO2@C); Supercapacitor

Abstract:In the presence of sulfonated polystyrene (sPS) template, sPS@SnO2 core shell particles formed via the interaction between the functional group of -SO3H on the template surface and ions of Sn2+ from the precursor of SnSO4 which were in ethanol-aqueous medium. After high-temperature calcination treatment for removal of sPS, the sPS@SnO2 changed into SnO2 hollow spheres. With the further carbonization of the sPS@SnO2@glucose composite microspheres, SnO2@C composite hollow spheres were fabricated. Using SEM, TEM, and N-2 adsorption - desorption technology, the structure, specific surface area, and the core-shell structure formation mechanism were determined. Cyclic voltammetry (CV) and galvanostatic charge-discharge (GCD) properties of SnO2 hollow spheres and SnO2@C composites were investigated, respectively, in the foam nickel electrode under alkaline condition. The specific capacitance of SnO2@C composite hollow spheres could reach 25.8 F g(-1) in 1 mol L-1 KOH aqueous solution and showed excellent charge-discharge behavior. (C) 2013 Elsevier B.V. All rights reserved.