Journal of Materials Science

, Volume 53, Issue 8, pp 6157–6169 | Cite as

Sea urchin-like architectures and nanowire arrays of cobalt–manganese sulfides for superior electrochemical energy storage performance

  • Yuying Zhu
  • Haichao Chen
  • Si Chen
  • Chao Li
  • Meiqiang Fan
  • Kangying Shu
Energy materials


Cobalt–manganese (Co–Mn)-based bimetallic compounds (such as Co–Mn oxides, hydroxides) have been investigated as a new type of high-performance electroactive materials for energy storage device. Nevertheless, Co–Mn sulfides are seldom investigated, especially for those with hierarchical architectures and structures. Herein, we first adopt a facile two-step hydrothermal route and synthesize Co–Mn sulfides with sea urchin-like architecture and nanowire array structure. The anion-exchange sulfuration process gives rise to hierarchical structure with numerous nanosheets grown on the surface. Benefiting from the attractive structures and the high electrochemical activity of Co–Mn sulfides, the Co–Mn sulfides show improved performance than Co–Mn oxides with similar morphology. Especially, the Ni foam-supported Co–Mn sulfide nanowire arrays exhibit superior performance of 502 C g−1 at 1 A g−1 as well as excellent cycling stability with 107% of capacity retention after 2000 cycles. In addition, a hybrid supercapacitor Co–Mn sulfide nanowire arrays/RGO displays an energy density of 18.4 Wh kg−1 at 375 W kg−1. More importantly, an ultrahigh power density (22.5 kW kg−1 at 9.5 Wh kg−1) and outstanding cycling stability can also be achieved. The excellent electrochemical performance can be ascribed to the attractive structure and high electrochemical activity of Co–Mn sulfide.



The authors acknowledge financial support from the Natural Science Foundation of Zhejiang Province (No. LQ17B010002), Natural Science Foundation of Shandong Province (No. ZR2017BB042), China Postdoctoral Science Foundation (No. 2017M612184) and source innovation plan project for basic application research of Qingdao (No. 17-1-1-25-jch).

Supplementary material

10853_2017_1976_MOESM1_ESM.docx (3.1 mb)
Supplementary material 1 (DOCX 3143 kb)


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Authors and Affiliations

  1. 1.College of Materials Science and EngineeringChina Jiliang University (CJLU)HangzhouChina
  2. 2.Institute of Materials for Energy and Environment, School of Materials Science and EngineeringQingdao UniversityQingdaoChina

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