Perforated Metal Oxide-Carbon Nanotube Composite Microspheres with Enhanced Lithium-Ion Storage Properties

Seung Ho Choi, Jong Heun Lee, Yun Chan Kang

Research output: Contribution to journalArticle

76 Citations (Scopus)

Abstract

Metal oxide - carbon nanotube (CNT) composite microspheres with a novel structure were fabricated using a one-step spray pyrolysis process. Metal oxide - CNT composite microspheres with a uniform distribution of void nanospheres were prepared from a colloidal spray solution containing CNTs, metal salts, and polystyrene (PS) nanobeads. Perforated SnO2 - CNT composite microspheres with a uniform distribution of void nanospheres showed excellent lithium storage properties as anode materials for lithium-ion batteries. Bare SnO2 microspheres and SnO2 - CNT composite microspheres with perforated and filled structures had a discharge capacity of 450, 1108, and 590 mA h g-1 for the 250th cycle at a current density of 1.5 A g-1, and the corresponding capacity retention compared to the second cycle was 41, 98, and 55%, respectively. The synergetic combination of void nanospheres and flexible CNTs improved the electrochemical properties of SnO2. This effective and innovative strategy could be used for the preparation of perforated metal oxide-CNT composites with complex elemental compositions for many applications.

Original languageEnglish
Pages (from-to)10173-10185
Number of pages13
JournalACS Nano
Volume9
Issue number10
DOIs
Publication statusPublished - 2015 Sep 7

Keywords

  • anode material
  • carbon composite
  • carbon nanotube
  • lithium-ion battery

ASJC Scopus subject areas

  • Engineering(all)
  • Materials Science(all)
  • Physics and Astronomy(all)

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