Synthesis of Mesoporous Single Crystal Co(OH)2 Nanoplate and Its Topotactic Conversion to Dual-Pore Mesoporous Single Crystal Co3O4

Bao Rui Jia, Ming Li Qin, Shu Mei Li, Zi Li Zhang, Hui Feng Lu, Peng Qi Chen, Hao Yang Wu, Xin Lu, Lin Zhang, Xuan Hui Qu

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

A new class of mesoporous single crystalline (MSC) material, Co(OH)2 nanoplates, is synthesized by a soft template method, and it is topotactically converted to dual-pore MSC Co3O4. Most mesoporous materials derived from the soft template method are reported to be amorphous or polycrystallined; however, in our synthesis, Co(OH)2 seeds grow to form single crystals, with amphiphilic block copolymer F127 colloids as the pore producer. The single-crystalline nature of material can be kept during the conversion from Co(OH)2 to Co3O4, and special dual-pore MSC Co3O4 nanoplates can be obtained. As the anode of lithium-ion batteries, such dual-pore MSC Co3O4 nanoplates possess exceedingly high capacity as well as long cyclic performance (730 mAh g-1 at 1 A g-1 after the 350th cycle). The superior performance is because of the unique hierarchical mesoporous structure, which could significantly improve Li+ diffusion kinetics, and the exposed highly active (111) crystal planes are in favor of the conversion reaction in the charge/discharge cycles.

Original languageEnglish
Pages (from-to)15582-15590
Number of pages9
JournalACS Applied Materials and Interfaces
Volume8
Issue number24
DOIs
Publication statusPublished - 2016 Jun 22
Externally publishedYes

Keywords

  • Co(OH)
  • CoO
  • Li-ion batteries
  • mesoporous single crystal
  • soft template
  • topotactic conversion

ASJC Scopus subject areas

  • Materials Science(all)

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