Convenient Design of Hollow Co3O4 Nanostructure on Carbon Cloth for Flexible Supercapacitors

Abstract

We proposed a new approach to construct zeolitic imidazolate frameworks-67 (ZIF-67) powders directly on carbon cloth without any conductive agent and adhesion agent and the ZIF-67 nanoparticles on carbon cloth were successfully converted into hollow Co3O4 nanostructure via a facile calcination process. Compared with original ZIF-67 powders, the Co3O4@CC electrode materials had admirable specific capacitance of 1 164.8 F·g−1 at an area current density of 2.5 mA·cm−2. Furthermore, the rate performance remained 42.4% of initial value when the current density was increased to 30 mA·cm−2 and the specific capacitance maintained 93.4% of initial capacity after 5 000 cycles at an area current density of 10 mA·cm−2. This strategy may have potential prospect for the application of MOFs in the energy storage and conversion field.

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Correspondence to Qiming Liu 刘启明.

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Funded by the National Natural Science Foundation of China (No.51572202), the National Science Foundation of Jiangsu Province (No. BK20171234) and the Foundation of Science and Technology on Plasma Physics Laboratory (No. 6142A0403050617)

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Liu, G., Li, H., Zhou, H. et al. Convenient Design of Hollow Co3O4 Nanostructure on Carbon Cloth for Flexible Supercapacitors. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 35, 469–472 (2020). https://doi.org/10.1007/s11595-020-2280-y

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Key words

  • metal-organic frameworks
  • ZIF-67
  • Co3O4
  • electrochemical
  • supercapacitors