Superior Na-ion storage properties of high aspect ratio SnSe nanoplates prepared by a spray pyrolysis process

Gi Dae Park, Jong Heun Lee, Yun Chan Kang

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

SnSe nanoplates with thin and uniform morphology are prepared by one-pot spray pyrolysis, and are examined as anode materials for Na-ion batteries. During the spray pyrolysis process, metallic Se and Sn are prepared from SeO2 and SnO2, respectively, under a reducing atmosphere. Metallic Sn and metalloid Se, with melting points of 232 and 221 °C, respectively, form a melted Sn-Se mixture, which reacts exothermally to form SnSe nanocrystals. Several of these nanocrystals are grown simultaneously forming a micron-sized powder. Complete elimination of the excess amount of metalloid Se, by forming H2Se gas, results in aggregation-free SnSe nanoplates. The aspect ratio of these nanoplates is as high as 11.3. The discharge capacities for the SnSe nanoplates, prepared from spray solutions containing 100, 400, and 800% of the stoichiometric SeO2 content needed to form SnSe, are 407, 558, and 211 mA h g-1, respectively, after 50 cycles at a constant current density of 0.3 A g-1; their capacity retentions calculated from the second cycle onwards are 77, 100, and 60%, respectively. The phase pure SnSe nanoplates with a high aspect ratio show good cycling and rate performances for Na-ion storage.

Original languageEnglish
Pages (from-to)11889-11896
Number of pages8
JournalNanoscale
Volume8
Issue number23
DOIs
Publication statusPublished - 2016 Jun 21

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Metalloids
Spray pyrolysis
Nanocrystals
Aspect ratio
Ions
Powders
Melting point
Anodes
Current density
Agglomeration
Gases

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Superior Na-ion storage properties of high aspect ratio SnSe nanoplates prepared by a spray pyrolysis process. / Park, Gi Dae; Lee, Jong Heun; Kang, Yun Chan.

In: Nanoscale, Vol. 8, No. 23, 21.06.2016, p. 11889-11896.

Research output: Contribution to journalArticle

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