Heterogeneous Ni-MOF/V2CTx-MXene hierarchically-porous nanorods for robust and high energy density hybrid supercapacitors

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

3 Scopus Citations
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Author(s)

  • Xifeng Yang
  • Yuhui Tian
  • Shuang Li
  • Ya-Pan Wu
  • Dong-Sheng Li
  • Shanqing Zhang

Detail(s)

Original languageEnglish
Pages (from-to)12225-12234
Journal / PublicationJournal of Materials Chemistry A
Volume10
Issue number22
Online published25 May 2022
Publication statusPublished - 14 Jun 2022

Abstract

Interfacial engineering is an appealing strategy to construct heterogeneous nanostructures and tunes the morphology of metal-organic frameworks (MOFs) and MXenes for hybrid supercapacitors. Herein, a temperature-controlled annealing process is introduced to fabricate Ni-MOFs/V2CTx-MXene (Tx denotes the surface groups, -O, -OH, and -F) composites on Ni foam (NF) (namely MOF/MXene/NF) and subsequently build the heterogeneous structure of a hierarchically-porous nanorod composite without a change in the crystalline structure. Experimental characterizations and theoretical calculations reveal that Ni-O-V bridging bonds are constructed at the Ni-MOF and V2CTx interfaces, which could be used to establish a favorable electronic structure in promoting conductivity and reactivity. The optimized MOF/MXene/NF electrode obtained at 300 °C (i.e., MOF/MXene/NF-300) delivers an ultrahigh specific capacity of 1103.9 C g−1 at 1 A g−1. The as-assembled hybrid supercapacitor, composed of MOF/MXene/NF-300 as the cathode and activated carbon/NF as the anode, delivers a high energy density of 46.3 W h kg−1 at a power density of 746.8 W kg−1 and an outstanding cycling stability of ca. 118.1% capacity retention after 15 000 cycles. Such an achievement stems from the strong chemical bonds at the interface and unique porous morphology. This work suggests a new avenue for designing and preparing robust and high-performance electrode materials for hybrid supercapacitors.

Citation Format(s)

Heterogeneous Ni-MOF/V2CTx-MXene hierarchically-porous nanorods for robust and high energy density hybrid supercapacitors. / Yang, Xifeng; Tian, Yuhui; Li, Shuang et al.

In: Journal of Materials Chemistry A, Vol. 10, No. 22, 14.06.2022, p. 12225-12234.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review