Design and synthesis of multiroom-structured metal compounds-carbon hybrid microspheres as anode materials for rechargeable batteries

Jung Sang Cho, Jong Min Won, Jung Kul Lee, Yun Chan Kang

Research output: Contribution to journalArticle

52 Citations (Scopus)

Abstract

A novel structure denoted as a "multiroom carbon hybrid", which comprises empty voids dispersed in metal oxide-, sulfide-, and selenide-carbon composites is introduced. Multiroom-structured carbon hybrid microspheres of single component Co3O4 and NiO and multicomponent (Ni0.5Co0.5)Ox were successfully prepared using a one-pot spray pyrolysis process. Liquid-liquid phase segregation during the spray pyrolysis process is a key requirement for generating multiroom-structured metal oxide-carbon hybrid microspheres. Multiroom-structured CoSe2-graphitic carbon (GC) and CoS2-CoS-GC hybrid microspheres were also prepared using a simple post-treatment process. Multiroom-structured CoSe2-GC hybrid microspheres have superior sodium-ion storage properties to bare CoSe2 microspheres. The reversible discharge capacities of the CoSe2-GC and CoS2-CoS-GC hybrid microspheres for the 100th cycles at a current density of 0.2 A g-1 are 393 and 334 mA h g-1, respectively. The discharge capacity of the multiroom-structured Co3O4-C hybrid microspheres for lithium-ion storage at a high current density of 3 A g-1 for the 150th cycle is 1243 mA h g-1.

Original languageEnglish
Pages (from-to)466-478
Number of pages13
JournalNano Energy
Volume26
DOIs
Publication statusPublished - 2016 Aug 1

Keywords

  • Lithium ion battery
  • Metal selenide
  • Nanostructure
  • Sodium ion battery
  • Spray pyrolysis

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)
  • Electrical and Electronic Engineering

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