Premium
General Formation of M x Co 3− x S 4 (M=Ni, Mn, Zn) Hollow Tubular Structures for Hybrid Supercapacitors
Author(s) -
Chen Yu Ming,
Li Zhen,
Lou Xiong Wen David
Publication year - 2015
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201504349
Subject(s) - supercapacitor , sulfidation , materials science , electrochemistry , electrode , nanofiber , capacitance , nanotechnology , polymer , composite number , chemical engineering , composite material , chemistry , metallurgy , sulfur , engineering
A simple and versatile method for general synthesis of uniform one‐dimensional (1D) M x Co 3− x S 4 (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@M x Co 3− x S 4 composite nanofibers. The as‐made M x Co 3− x S 4 HTSs have a high surface area and exhibit exceptional electrochemical performance as electrode materials for hybrid supercapacitors. For example, the MnCo 2 S 4 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.