General Formation of MxCo3−xS4 (M=Ni,Mn, Zn) Hollow Tubular Structures for Hybrid Supercapacitors |
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Authors: | Dr Yu Ming Chen Dr Zhen Li Prof Xiong Wen Lou |
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Institution: | School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459 (Singapore) http://www.ntu.edu.sg/home/xwlou/ |
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Abstract: | 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. |
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Keywords: | mixed metal sulfides nanotubes polymeric template supercapacitors |
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