PPy-encapsulated SnS 2 Nanosheets Stabilized by Defects on a TiO 2 Support as a Durable Anode Material for Lithium-Ion Batteries

Ling Wu, Jie Zheng, Liang Wang, Xunhui Xiong, Yanyan Shao, Gang Wang, Jeng Han Wang, Shengkui Zhong, Minghong Wu

Research output: Contribution to journalArticle

96 Citations (Scopus)

Abstract

Nanostructured-alloy-type anodes have received great interest for high-performance lithium-ion batteries (LIBs). However, these anodes experience huge volume fluctuations during repeated lithiation/delithiation and are easily pulverized and subsequently form aggregates. Herein, an efficient method to stabilize alloy-type anodes by creating defects on the surface of the metal oxide support is proposed. As a demonstration, PPy-encapsulated SnS 2 nanosheets supported on defect-rich TiO 2 nanotubes were produced and investigated as an anode material for LIBs. Both experimental results and theoretical calculations demonstrate that defect-rich TiO 2 provides more chemical adhesions to SnS 2 and discharge products, compared to defect-poor TiO 2 , and then effectively stabilizes the electrode structure. As a result, the composite exhibits an unprecedented cycle stability. This work paves the way to designing durable and active nanostructured-alloy-type anodes on oxide supports.

Original languageEnglish
Pages (from-to)811-815
Number of pages5
JournalAngewandte Chemie - International Edition
Volume58
Issue number3
DOIs
Publication statusPublished - 2019 Jan 14

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Keywords

  • SnS anode
  • TiO support
  • cycle stability
  • lithium-ion battery
  • oxygen defect

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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