A Multi-wall Sn/SnO2@carbon hollow nanofiber anode material for high-rate and long-life lithium-ion batteries

Songwei Gao, Nü Wang, Shuai Li, Dianming Li, Zhimin Cui, Guichu Yue, Jingchong Liu, Xiaoxian Zhao, Lei Jiang, Yong Zhao

Research output: Contribution to journalArticleResearchpeer-review

243 Citations (Scopus)

Abstract

Multi-wall Sn/SnO2@carbon hollow nanofibers evolved from SnO2 nanofibers are designed and programable synthesized by electrospinning, polypyrrole coating, and annealing reduction. The synthesized hollow nanofibers have a special wire-in-double-wall-tube structure with larger specific surface area and abundant inner spaces, which can provide effective contacting area of electrolyte with electrode materials and more active sites for redox reaction. It shows excellent cycling stability by virtue of effectively alleviating pulverization of tin-based electrode materials caused by volume expansion. Even after 2000 cycles, the wire-in-double-wall-tube Sn/SnO2@carbon nanofibers exhibit a high specific capacity of 986.3 mAh g−1 (1 A g−1) and still maintains 508.2 mAh g−1 at high current density of 5 A g−1. This outstanding electrochemical performance suggests the multi-wall Sn/SnO2@ carbon hollow nanofibers are great promising for high performance energy storage systems.

Original languageEnglish
Pages (from-to)2465-2472
Number of pages8
JournalAngewandte Chemie - International Edition
Volume59
Issue number6
DOIs
Publication statusPublished - 3 Feb 2020
Externally publishedYes

Keywords

  • electrospinning
  • hollow nanofibers
  • lithium ion batteries
  • tin/tin oxide

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