Applying Nanoscale Kirkendall Diffusion for Template-Free, Kilogram-Scale Production of SnO2 Hollow Nanospheres via Spray Drying System

Jung Sang Cho, Hyeon Seok Ju, Yun Chan Kang

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

A commercially applicable and simple process for the preparation of aggregation-free metal oxide hollow nanospheres is developed by applying nanoscale Kirkendall diffusion to a large-scale spray drying process. The precursor powders prepared by spray drying are transformed into homogeneous metal oxide hollow nanospheres through a simple post-treatment process. Aggregation-free SnO2 hollow nanospheres are selected as the first target material for lithium ion storage applications. Amorphous carbon microspheres with uniformly dispersed Sn metal nanopowder are prepared in the first step of the post-treatment process under a reducing atmosphere. The post-treatment of the Sn-C composite powder at 500 °C under an air atmosphere produces carbon-and aggregation-free SnO2 hollow nanospheres through nanoscale Kirkendall diffusion. The hollow and filled SnO2 nanopowders exhibit different cycling performances, with their discharge capacities after 300 cycles being 643 and 280 mA h-1, respectively, at a current density of 2 A-1. The SnO2 hollow nanospheres with high structural stability exhibit superior cycling and rate performances for lithium ion storage compared to the filled ones.

Original languageEnglish
Article number23915
JournalScientific reports
Volume6
DOIs
Publication statusPublished - 2016 Apr 1

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Spray drying
Nanospheres
Agglomeration
Metals
Lithium
Powders
Oxides
Ions
Amorphous carbon
Microspheres
Current density
Carbon
Composite materials
Air

ASJC Scopus subject areas

  • General

Cite this

Applying Nanoscale Kirkendall Diffusion for Template-Free, Kilogram-Scale Production of SnO2 Hollow Nanospheres via Spray Drying System. / Cho, Jung Sang; Ju, Hyeon Seok; Kang, Yun Chan.

In: Scientific reports, Vol. 6, 23915, 01.04.2016.

Research output: Contribution to journalArticle

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