Ultrafast synthesis of yolk-shell and cubic NiO nanopowders and application in lithium ion batteries

Seung Ho Choi, Yun Chan Kang

Research output: Contribution to journalArticle

78 Citations (Scopus)

Abstract

A continuous one-pot method was employed to synthesize yolk-shell and single-crystalline cubic NiO powders in a few seconds. Submicrometer-sized NiO yolk-shell particles were prepared by spray pyrolysis at 900 C. Single-crystalline cubic NiO nanopowders were prepared by one-pot flame spray pyrolysis from NiO vapors. Particle surface areas of the yolk-shell and single-crystalline cubic NiO powders as obtained using the Brunauer-Emmett- Teller method were 8 and 5 m2 g-1, respectively. The mean crystallite sizes of the yolk-shell-structured and cubic NiO powders were 50 and 80 nm, respectively. The yolk-shell and single-crystalline cubic NiO powders delivered discharge capacities of 951 and 416 mA h g-1, respectively, after 150 cycles, and the corresponding capacity retentions measured after the first cycle were 106 and 66%, respectively. The yolk-shell-structured NiO powders showed rate performance better than that of the single-crystalline cubic NiO nanopowders. Even at a high current density of 1 A g-1, the discharge capacity of the yolk-shell-structured NiO powders was as high as 824 mA h g-1 after 50 cycles, in which the current densities were increased stepwise.

Original languageEnglish
Pages (from-to)2312-2316
Number of pages5
JournalACS Applied Materials and Interfaces
Volume6
Issue number4
DOIs
Publication statusPublished - 2014 Feb 26
Externally publishedYes

Keywords

  • anode material
  • flame spray pyrolysis
  • lithium ion battery
  • nanocubic
  • spray pyrolysis
  • yolk shell

ASJC Scopus subject areas

  • Materials Science(all)

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