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Journal of Materials Science: Materials in Electronics

, Volume 30, Issue 17, pp 16000–16007 | Cite as

The different electrochemical performance of nickel–cobalt sulfide and its formation mechanism of honeycomb-like structure

  • Sheng Zhang
  • Yabo ZhuEmail author
  • Chunyang Kong
  • Chao Shi
  • Qian Xu
  • Wanying Liu
Article
  • 43 Downloads

Abstract

Various double-solvent systems, including EG–IPA, glycerol–IPA, EG–methanol and EG–ethanol etc., were used to fabricate nickel–cobalt sulfide (NCS). Their products showed different structure with granular-, hollow sphere-, honeycomb-, irregular sphere-like microstructures and so on. The electrochemical performances of these samples were investigated by CV and GCD measurements. The results indicate that at 1A/g, their specific capacitances are 912, 980, 1464, 1072, 1130, 1108, 1006 and 866 F/g, respectively, among which honeycomb-like structure has the best performance. The best sample also shows excellent charge–discharge performance, that is, it still retains more than 88% of the initial capacity after 2000 cycles. Furthermore, the formation mechanism of the pores in the honeycomb structure was studied in detail. Therefore, a special experiment was designed to reveal the cause of the pore formation. This study is of great significance for the design of transition metal compounds with excellent electrochemical properties.

Notes

Acknowledgements

This research is supported by “The Fundamental Research Funds for the Central Universities (No. 2019XKQYMS21)”.

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© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.School of Materials Science and EngineeringChina University of Mining and TechnologyXuzhouPeople’s Republic of China
  2. 2.Chongqing Key Laboratory of Optoelectronic Functional MaterialsChongqingPeople’s Republic of China

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