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Successful synthesis of interconnected Co0.85Se nanosheets with high pore volume and its electrochemical performance in supercapacitors

  • Xiaobo Chen
  • Kechun Mao
  • Chengxin Yang
  • Jingjin Ni
  • Guoce Zhuang
  • Haitao Huang
  • Xiaohua Wang
  • Peizhi Yang
Article
  • 9 Downloads

Abstract

Interconnected Co0.85Se nanosheets have been prepared by a facile hydrothermal method via tuning reaction time to control the chemical constitution and the morphology. The nanosheets morphology of Co0.85Se offers sufficient electron transfer and short ion diffusion pathway, which can favor the fast transfer of electrolyte ions. The Co0.85Se electrode exhibits specific capacitance of 980 F g− 1 at 10 A g− 1 with high cycling life stability (8.3% loss after 5000 cycles) and good conductivity. The assembled Co0.85Se//AC asymmetric supercapacitor (ASC) device exhibits a high energy density of 46.2 Wh kg− 1 at a power density of 807.4 W kg− 1 and still maintained 29.3 Wh kg− 1 at a power density of 15981.8 W kg− 1 with excellent cycling performance (90.01% capacitance retention over 5000 cycles). The impressive results indicate that such unique interconnected Co0.85Se nanosheets are promising electrode materials for high-performance supercapacitors.

Notes

Acknowledgements

This work was supported by the National Natural Science Foundation of China (Grant No. 11747001), The Natural Science Foundation of the Jiangsu Higher Education Institutions of China (Grant No. 17KJB140029) and the Key Applied Basic Research Program of Yunnan Province (Grant No. 2017FA024).

Supplementary material

10854_2018_191_MOESM1_ESM.docx (988 kb)
Supplementary material 1 (DOCX 987 KB)

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

Authors and Affiliations

  1. 1.School of New Energy and Electronic EngineeringYancheng Teachers UniversityYanchengPeople’s Republic of China
  2. 2.Key Laboratory of Education Ministry for Advance Technique and Preparation of Renewable Energy Materials, Institute of Solar EnergyYunnan Normal UniversityKunmingPeople’s Republic of China

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