Synthesis of Uniquely Structured SnO2 Hollow Nanoplates and Their Electrochemical Properties for Li-Ion Storage

Gi Dae Park, Jung Kul Lee, Yun Chan Kang

Research output: Contribution to journalArticlepeer-review

68 Citations (Scopus)

Abstract

A new mechanism for the transformation of nanostructured metal selenides into uniquely structured metal oxides via the Kirkendall effect, which results from the different diffusion rates of metal and Se ions and O2 gas, is proposed. SnSe nanoplates are selected as the first target material and transformed into SnO2 hollow nanoplates by the Kirkendall effect. SnSe-C composite powder, in which SnSe nanoplates are attached or stuck to amorphous carbon microspheres, transforms into several tens of SnO2 hollow nanoplates by a thermal oxidation process under an air atmosphere. Core–shell-structured SnSe-SnSe2@SnO2, SnSe2@SnO2, Se-SnSe2@SnO2, and Se@SnO2 and yolk–shell-structured Se@void@SnO2 intermediates are formed step-by-step during the oxidation of the SnSe nanoplates. The uniquely structured SnO2 hollow nanoplates have superior cycling and rate performance for Li-ion storage. Additionally, their discharge capacities at the 2nd and 600th cycles are 598 and 500 mA h g-1, respectively, and the corresponding capacity retention measured from the 2nd cycle is as high as 84%.

Original languageEnglish
Article number1603399
JournalAdvanced Functional Materials
Volume27
Issue number4
DOIs
Publication statusPublished - 2017 Jan 26

Keywords

  • hollow nanoplates
  • Kirkendall diffusion
  • lithium ion batteries
  • spray pyrolysis
  • tin oxide

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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