Phase boundary engineering of metal-organic-framework-derived carbonaceous nickel selenides for sodium-ion batteries

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

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Author(s)

  • Hu Wu
  • Jingwei Hou
  • Limin Liu
  • Jiao Li
  • Chris J. Harris
  • Cheng-Yen Lao
  • Yuzheng Guo
  • Kai Xi
  • Shujiang Ding
  • Guoxin Gao
  • Anthony K. Cheentham
  • R. Vasant Kumar

Related Research Unit(s)

Detail(s)

Original languageEnglish
Pages (from-to)2289–2298
Journal / PublicationNano Research
Volume13
Issue number8
Online published2 Jul 2020
Publication statusPublished - Aug 2020

Link(s)

Abstract

Sodium-ion batteries (SIBs) are promising power sources due to the low cost and abundance of battery-grade sodium resources, while practical SIBs suffer from intrinsically sluggish diffusion kinetics and severe volume changes of electrode materials. Metal-organic framework (MOFs) derived carbonaceous metal compound offer promising applications in electrode materials due to their tailorable composition, nanostructure, chemical and physical properties. Here, we fabricated hierarchical MOF-derived carbonaceous nickel selenides with bi-phase composition for enhanced sodium storage capability. As MOF formation time increases, the pyrolyzed and selenized products gradually transform from a single-phase Ni3Se4 into bi-phase NiSex then single-phase NiSe2, with concomitant morphological evolution from solid spheres into hierarchical urchin-like yolk-shell structures. As SIBs anodes, bi-phase NiSex@C/CNT-10h (10 h of hydrothermal synthesis time) exhibits a high specific capacity of 387.1 mAh/g at 0.1 A/g, long cycling stability of 306.3 mAh/g at a moderately high current density of 1 A/g after 2,000 cycles. Computational simulation further proves the lattice mismatch at the phase boundary facilitates more interstitial space for sodium storage. Our understanding of the phase boundary engineering of transformed MOFs and their morphological evolution is conducive to fabricate novel composites/hybrids for applications in batteries, catalysis, sensors, and environmental remediation.

Research Area(s)

  • carbon nanotube, metal organic frameworks, metal selenides, phase boundary, sodium ion batteries

Citation Format(s)

Phase boundary engineering of metal-organic-framework-derived carbonaceous nickel selenides for sodium-ion batteries. / Lu, Shiyao; Wu, Hu; Hou, Jingwei et al.

In: Nano Research, Vol. 13, No. 8, 08.2020, p. 2289–2298.

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

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