Micro-/nanostructured Co3O4 anode with enhanced rate capability for lithium-ion batteries

Guoyong Huang, Shengming Xu, Shasha Lu, Linyan Li, Hongyu Sun

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Through a facile hydrothermal method with a special surfactant triethanolamine (TEA) followed by thermal treatment, monodispersed micro-/nanostructured Co3O4 powders with unique morphology (cube) have been synthesized successfully as anode material for Li-ion batteries (LIBs). The regular Co3O4 microcubes (∼2.37 μm in the average side length) consist of many irregular nanoparticles (20-200 nm in diameter, 30-40 nm in thickness) bonded to each other, which greatly inherit the morphology and size of the precursor CoCO3. The specific surface area of Co3O4 powders is about 5.10 m2·g-1 by the Brunauer-Emmett-Teller (BET) method, and the average pore size is about 3.08 nm by the Barrett-Joyner-Halenda (BJH) method. In addition, the precursor is verified as a single-crystal, while the mesoporous cubic Co3O4 is a polycrystalline characteristic assembled by numerous single-crystal nanoparticles. More remarkable, the high performance of the micro-/nanostructured cubic Co3O4 powders has been obtained by the electrochemical measurements including high initial discharge capacities (1298 mAhg-1 at 0.1 C and 1041 mAhg -1 at 1 C), impressive rate capability, and excellent capacity retention (99.3%, 97.5%, 99.2%, and 89.9% of the first charge capacities after 60 cycles at 0.1 C, 0.2 C, 0.5 C, and 1 C, respectively). © 2014 American Chemical Society.
Original languageEnglish
JournalA C S Applied Materials and Interfaces
Volume6
Issue number10
Pages (from-to)7236-7243
Number of pages8
ISSN1944-8244
DOIs
Publication statusPublished - 2014
Externally publishedYes

Keywords

  • Cobalt oxide
  • Cube
  • Enhanced rate capability
  • Lithium-ion batteries
  • Mesoporous
  • Micro-/nanostructured

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