Issue 21, 2015

Controlled synthesis of zinc cobalt sulfide nanostructures in oil phase and their potential applications in electrochemical energy storage

Abstract

A unique controlled synthesis of zinc cobalt sulfide nanostructures is obtained by a facile oil phase approach. Nanoartichokes composed of self-assembled nanosheets and nanoparticles have been fabricated by using different sulfur sources. The application of such nanomaterials is demonstrated as electrodes for supercapacitors and lithium-ion batteries. Serving as lithium-ion battery electrodes, the ZnxCo1−xS nanoartichokes deliver a higher specific capacity of 750 mA h g−1 during the 100th cycle as compared to only 220 mA h g−1 for nanoparticles. In supercapacitor tests, the ZnxCo1−xS nanoartichokes possess an improved specific capacitance (486.2 F g−1 at a current density of 2.0 A g−1) and excellent cycling stability (retaining 86.4% after 2000 cycles), both of which are much higher than those of nanoparticles (e.g. 406.7 F g−1 and 73.3%). This effective nanostructure design of ternary transition metal sulfides could provide a promising method to construct high-performance materials for energy and environment applications.

Graphical abstract: Controlled synthesis of zinc cobalt sulfide nanostructures in oil phase and their potential applications in electrochemical energy storage

Supplementary files

Article information

Article type
Paper
Submitted
08 Mar 2015
Accepted
27 Apr 2015
First published
27 Apr 2015

J. Mater. Chem. A, 2015,3, 11462-11470

Controlled synthesis of zinc cobalt sulfide nanostructures in oil phase and their potential applications in electrochemical energy storage

J. Yang, Y. Zhang, C. Sun, G. Guo, W. Sun, W. Huang, Q. Yan and X. Dong, J. Mater. Chem. A, 2015, 3, 11462 DOI: 10.1039/C5TA01739D

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