Nano

SKKU Advanced Institute of Nano Technology (성균관대학교 성균나노과학기술원)
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ZnO@Ni-Co-S Core-Shell Nanorods-Decorated Carbon Fibers as Advanced Electrodes for High-Performance Supercapacitors

  • Sui, Yanwei (School of Materials Science and Engineering China University of Mining and Technology) ;
  • Zhang, Man (School of Materials Science and Engineering China University of Mining and Technology) ;
  • Hu, Haihua (School of Materials Science and Engineering China University of Mining and Technology) ;
  • Zhang, Yuanming (School of Materials Science and Engineering China University of Mining and Technology) ;
  • Qi, Jiqiu (School of Materials Science and Engineering China University of Mining and Technology) ;
  • Wei, Fuxiang (School of Materials Science and Engineering China University of Mining and Technology) ;
  • Meng, Qingkun (School of Materials Science and Engineering China University of Mining and Technology) ;
  • He, Yezeng (School of Materials Science and Engineering China University of Mining and Technology) ;
  • Ren, Yaojian (School of Materials Science and Engineering China University of Mining and Technology) ;
  • Sun, Zhi (School of Materials Science and Engineering China University of Mining and Technology)
  • Received : 2018.07.16
  • Accepted : 2018.11.20
  • Published : 2018.12.31
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Abstract

The interconnected three-dimensional Ni-Co-S nanosheets were successfully deposited on ZnO nanorods by a one-step potentiostatic electrodeposition. The Ni-Co-S nanosheets provide a large electrode/electrolyte interfacial area which has adequate electroactive sites for redox reactions. Electrochemical characterization of the ZnO@Ni-Co-S core-shell nanorods presents high specifc capacitance (1302.5 F/g and 1085 F/g at a current density of 1 A/g and 20 A/g), excellent rate capabilities (83.3% retention at 20 A/g) and great cycling stability (65% retention after 5000 cycles at a current density of 30 A/g). The outstanding electrochemical performance of the as-prepared electrode material also can be ascribed to these reasons that the special structure improved electrical conductivity and allowed the fast diffusion of electrolyte ions.

Keywords

Acknowledgement

Supported by : Central Universities

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