Journal of Materials Science

, Volume 54, Issue 6, pp 4821–4830 | Cite as

Uniform growth of NiCo2S4 nanoflakes arrays on nickel foam for binder-free high-performance supercapacitors

  • Yan Zhang
  • Xinzhu Wang
  • Man Shen
  • Xin Fu
  • Ming HuangEmail author
  • Xiaoying Liu
  • Yu Xin ZhangEmail author
Energy materials


In this work, ultrathin NiCo2O4 nanosheets have been synthesized through an electrodeposition method together with a further calcination process. By using CH3CSNH2 as sulfur source, the NiCo2O4 was converted into NiCo2S4 via anion exchange reaction (from oxygen to sulfur). Scanning electron microscopy imaging together with the energy-dispersive X-ray spectroscopy mapping indicates the successful transformation from NiCo2O4 to NiCo2S4. The uniform and porous NiCo2S4 architectures show good electrical contact to the current collector and good wettability, which can facilitate the transport for electrons and electrolyte ions. As a result, the as-prepared NiCo2S4 electrode shows a greatly enhanced electrochemical performance than NiCo2O4, with a high specific capacitance (1051 F g−1 at a current density of 0.5 A g−1) and good cycling stability (capacity retention of 85% after 5000 charge/discharge cycles). These impressive performances suggest that the porous NiCo2S4 structures can be used as promising binder-free electrode materials for high-performance supercapacitors.



The authors gratefully acknowledge the financial support provided by the National Natural Science Foundation of China (Grant No. 21576034), the State Education Ministry and Fundamental Research Funds for the Central Universities (106112017CDJXSYY0001, 2018CDYJSY0055, 106112017CDJQJ138802, 106112017CDJXSYY0001, 106112017CDJSK04XK11 and 2018CDQYCL0027) and the Innovative Research Team of Chongqing (CXTDG201602014). The authors would like to extend special thanks to Ms. Qian Chen of Chongqing University for language polishing. The authors also thank the Electron Microscopy Center of Chongqing University for material characterizations.

Compliance with ethical standards

Conflict of interest

All authors listed have declared that they have no conflict of interest.

Supplementary material

10853_2018_3182_MOESM1_ESM.doc (27.4 mb)
Supplementary material 1 (DOC 28094 kb)


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© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.State Key Laboratory of Mechanical Transmissions, College of Materials Science and EngineeringChongqing UniversityChongqingPeople’s Republic of China
  2. 2.College of Aerospace EngineeringChongqing UniversityChongqingPeople’s Republic of China
  3. 3.School of Materials Science and EngineeringUlsan National Institute of Science and Technology (UNIST)UlsanRepublic of Korea
  4. 4.Engineering Research Center for Waste Oil Recovery Technology and Equipment of Ministry of Education, College of Environment and ResourcesChongqing Technology and Business UniversityChongqingChina

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