Self-supporting NiO-coated activated carbon nanofibers based on atomic layer deposition for supercapacitor

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Xiaomeng Yang
  • Yajiao Cui
  • Yingyu Qi
  • Luyan Fu
  • Jianshe Wang
  • Dong Sui
  • Yongsheng Zhang

Detail(s)

Original languageEnglish
Article number170513
Journal / PublicationJournal of Alloys and Compounds
Volume958
Online published9 May 2023
Publication statusPublished - 5 Oct 2023
Externally publishedYes

Abstract

The rapid development of consumer electronics, electric vehicles, and smart meters demands high-performance energy storage devices. By now, supercapacitors are expected to become one of the most promising energy devices for future energy technology. In this work, NiO nanoparticles supported on activated carbon nanofibers (NiO/ACNFs) have been synthesized by atomic layer deposition technique, which is directly used as self-supporting binder-free electrodes for supercapacitors. Scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, and Raman results show that NiO nanoparticles (3.1 nm) are uniformly coated on ACNFs. The NiO/ACNFs-600 electrodes demonstrate a specific capacitance of 870 F·g−1 (1 A·g−1) and good rate capability (remain 67% at 10 A·g−1). The asymmetric supercapacitor devices with NiO/ACNFs-600//ACNFs electrodes yield a fairly high energy density of 39.85 Wh·kg−1 at 2000 W·kg−1 and excellent capacitance retention of 87% after 10,000 cycles. The excellent electrochemical capacitance performance for NiO/ACNFs is attributed to the high conductivity and large specific surface area of ACNFs, high capacity, small size, and even dispersion of NiO as well as the synergistic effect between them. These results demonstrate that NiO/ACNFs can serve as excellent electrode materials for high-performance asymmetric supercapacitors. © 2023 Published by Elsevier B.V.

Research Area(s)

  • Activated carbon nanofibers, Atomic layer deposition, NiO, Supercapacitor

Citation Format(s)

Self-supporting NiO-coated activated carbon nanofibers based on atomic layer deposition for supercapacitor. / Yang, Xiaomeng; Cui, Yajiao; Qi, Yingyu et al.
In: Journal of Alloys and Compounds, Vol. 958, 170513, 05.10.2023.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review