Improving the cycling stability of Sn4P3 anode for sodium-ion battery

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

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Detail(s)

Original languageEnglish
Pages (from-to)420-425
Journal / PublicationJournal of Power Sources
Volume364
Online published29 Aug 2017
Publication statusPublished - 1 Oct 2017

Abstract

Experimental results from electrochemical characterizations and ex-situ X-ray diffraction (XRD) of the Sn4P3 anode upon cycling reveal that Sn agglomeration from the Sn4P3 particles plays a major role in the fast capacity fading of the Sn4P3 anode for sodium-ion batteries. TiC is demonstrated to be an effective additive to enhance the cycle stability of Sn4P3 by suppressing Sn agglomeration during cycling. Sn4P3/30-wt%TiC composite delivers a stable capacity of 300 mAh g-1 or 700 Ah L-1 over 100 cycles at current density of 100 mA g-1. The high density TiC (4.93 g cm-3), as compared to conventional carbon based additives, makes it attractive for achieving higher volumetric capacity of the anode.

Research Area(s)

  • Anode, Sodium ion battery, Tin agglomeration, Tin phosphide, Titanium carbide