Structural design of Ni-silicate/CNT hybrid films as anode materials for highly reversible lithium and sodium storage

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

12 Scopus Citations
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Author(s)

  • Pengyi Lu
  • Xiao Yan
  • Xinzhong Wang
  • Feng Hou
  • Ji Liang

Detail(s)

Original languageEnglish
Article numbere00375
Journal / PublicationSustainable Materials and Technologies
Volume31
Online published8 Dec 2021
Publication statusPublished - Apr 2022

Abstract

Low-cost transition metal silicates are regarded as promising high-performance anode materials for cation storage due to their high capacitance. However, the intrinsically low conductivity of transition metal silicates should be properly addressed to fully utilize their high cation storage properties, which remains a challenge. Herein, we report a three-dimensional (3D) hybrid film featured with nickel silicate nanosheets combined with carbon nanotubes (Ni-silicate/CNTs) prepared by a one-step hydrothermal strategy. In the highly flexible film, bunches of ultrathin Ni-silicate nanosheets are uniformly anchored on the CNTs, which form a 3D interconnected network with open porosity. This Ni-silicate/CNT material shows excellent first cycle coulombic efficiency, good rate performance, and outstanding cycle performance (85.3% capacity retention after 1000 cycles at 3 A g−1) when used as binder-free electrodes for LIBs. In addition, it can also deliver a high electrochemistry performance in SIBs, and the average reversible specific capacity is 643.7 mAh g−1 at 0.05 A g−1. Our results suggest the great potential of such Ni-silicate/CNT hybrid films as flexible LIB/SIB electrodes for practical applications.

Research Area(s)

  • Carbon nanotubes, lithium-ion storage, Ni-silicate nanosheets, Sodium-ion storage