Anchoring SnS2 on TiC/C Backbone to Promote Sodium Ion Storage by Phosphate Ion Doping

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

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Author(s)

  • Yanbin Shen
  • Shengjue Deng
  • Ping Liu
  • Yan Zhang
  • Yahao Li
  • Xili Tong
  • Hong Shen
  • Guoxiang Pan
  • Lingjie Zhang
  • Xiuli Wang
  • Xinhui Xia
  • Jiangping Tu

Related Research Unit(s)

Detail(s)

Original languageEnglish
Article number2004072
Journal / PublicationSmall
Volume16
Issue number40
Online published6 Sep 2020
Publication statusPublished - 8 Oct 2020

Abstract

Tin disulfide (SnS2) shows promising properties toward sodium ion storage with high capacity, but its cycle life and high rate capability are still undermined as a result of poor reaction kinetics and unstable structure. In this work, phosphate ion (PO43−)-doped SnS2 (P-SnS2) nanoflake arrays on conductive TiC/C backbone are reported to form high-quality P-SnS2@TiC/C arrays via a hydrothermal–chemical vapor deposition method. By virtue of the synergistic effect between PO43− doping and conductive network of TiC/C arrays, enhanced electronic conductivity and enlarged interlayer spacing are realized in the designed P-SnS2@TiC/C arrays. Moreover, the introduced PO43− can result in favorable intercalation/deintercalation of Na+ and accelerate electrochemical reaction kinetics. Notably, lower bandgap and enhanced electronic conductivity owing to the introduction of PO43− are demonstrated by density function theory calculations and UV–visible absorption spectra. In view of these positive factors above, the P-SnS2@TiC/C electrode delivers a high capacity of 1293.5 mAh g−1 at 0.1 A g−1 and exhibits good rate capability (476.7 mAh g−1 at 5 A g−1), much better than the SnS2@TiC/C counterpart. This work may trigger new enthusiasm on construction of advanced metal sulfide electrodes for application in rechargeable alkali ion batteries.

Research Area(s)

  • anodes, arrays, phosphate ion doping, sodium ion batteries, tin disulfide

Citation Format(s)

Anchoring SnS2 on TiC/C Backbone to Promote Sodium Ion Storage by Phosphate Ion Doping. / Shen, Yanbin; Deng, Shengjue; Liu, Ping; Zhang, Yan; Li, Yahao; Tong, Xili; Shen, Hong; Liu, Qi; Pan, Guoxiang; Zhang, Lingjie; Wang, Xiuli; Xia, Xinhui; Tu, Jiangping.

In: Small, Vol. 16, No. 40, 2004072, 08.10.2020.

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