Release Time:2019-03-11  Hits:

Indexed by: Journal Article

Date of Publication: 2017-10-01

Journal: JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS

Included Journals: EI、SCIE、Scopus

Volume: 28

Issue: 19

Page Number: 14646-14654

ISSN: 0957-4522

Abstract: In this paper, novel hierarchical Mn-decorated NiCo2S4 nanosheet arrays on Ni foam have been synthesized by a facile multi-step hydrothermal method and directly used as binder-free electrodes for supercapacitors. The vertically aligned NiCo2S4 nanosheet arrays on Ni foam act as not only a good pseudocapacitive material but also a conductive scaffold that can be uniformly decorated by ultrathin and interconnected chiffon-like nanoflakes of MnS2. This unique architecture with a highly specific surface area and fast transfer channels for electron and ion can employ many independent nanospaces to participate in electrochemical reaction. The optimized Mn-decorated NiCo2S4 nanosheet arrays electrode represents an impressive areal capacitance of 4.6 F cm(-2) at 2 mA cm(-2) and good cycling stability (87.3% of the areal capacitance can be maintained after 2000 cycles at 10 mA cm(-2)), indicating the great potential of this hybrid hierarchical nanostructure as a promising candidate for high-performance supercapacitors.