General Formation of MxCo3−xS4 (M=Ni, Mn, Zn) Hollow Tubular Structures for Hybrid Supercapacitors

A simple and versatile method for general synthesis of uniform one‐dimensional (1D) MxCo3−xS4 (M=Ni, Mn, Zn) hollow tubular structures (HTSs), using soft polymeric nanofibers as a template, is described. Fibrous core–shell polymer@M‐Co acetate hydroxide precursors with a controllable molar ratio of...

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Bibliographic Details
Published in:Angewandte Chemie (International ed.) 2015-09, Vol.54 (36), p.10521-10524
Main Authors: Chen, Yu Ming, Li, Zhen, Lou, Xiong Wen (David)
Format: Article
Language:English
Subjects:
Acetic acid
Capacitance
Composite materials
Electrochemical analysis
Electrochemistry
Electrode materials
Electrodes
Manganese
Microprocessors
mixed metal sulfides
Nanofibers
nanotubes
polymeric template
Supercapacitors
Zinc
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Summary:A simple and versatile method for general synthesis of uniform one‐dimensional (1D) MxCo3−xS4 (M=Ni, Mn, Zn) hollow tubular structures (HTSs), using soft polymeric nanofibers as a template, is described. Fibrous core–shell polymer@M‐Co acetate hydroxide precursors with a controllable molar ratio of M/Co are first prepared, followed by a sulfidation process to obtain core–shell polymer@MxCo3−xS4 composite nanofibers. The as‐made MxCo3−xS4 HTSs have a high surface area and exhibit exceptional electrochemical performance as electrode materials for hybrid supercapacitors. For example, the MnCo2S4 HTS electrode can deliver specific capacitance of 1094 F g−1 at 10 A g−1, and the cycling stability is remarkable, with only about 6 % loss over 20 000 cycles. Hollow tubular structures of MxCo3−xS4 (M=Ni, Mn, Zn) can be synthesized with controllable composition by using a simple soft polymeric template (polyacrylonitrile; PAN). The as‐prepared mixed‐metal sulfide nanotubes exhibit unprecedented electrochemical performance as electrode materials for hybrid supercapacitors.
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.201504349