具有分级结构的Co3O4绣球花状微米球的构筑及其锂离子电池负极性能研究

doi:10.3976/j.issn.1002-4026.2017.06.008

Abstract

Abstract:

In this paper, the hydrangealike Co3O4 nanomaterials have been developed using solvothermal method, and the morphology and microstructure analysis have been identified by the SEM and XRD. The results showed that the morphology of sample was 4~6 μm hydrangea like microspheres with hierarchical structure, wellcrystallized and without any impurity phase. When applied as anode material in lithium ion battery, hydrangealike Co3O4 hierarchical structure demonstrated high reversible capacity and good recyclability. The Co3O4 anode could deliver initial discharge capacity as high as 1508 mA·h/g at a current density of 300 mA/g, and had excellent reversible capacity of 1300 mA·h/g after 20 cycles. The unique morphology of the assynthesized hydrangealike Co3O4 nanomaterials enhances their electrochemical performance. The peculiar hierarchical structure of Co3O4 provides a short path for Li+ ion diffusion, and enough free space to accommodate the large volume changed during cycling.

Key words: Co3O4, hydrangea-like, lithium-ion batteries, solvothermal

CLC Number:

TB34

WEI Lei,WANG Wei. Facile fabrication of Co3O4 hydrangealike microspheres with hierarchical structure and research on their enhanced performance in lithium ion batteries[J].SHANDONG SCIENCE, 2017, 30(6): 45-49.

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Facile fabrication of Co3O4 hydrangealike microspheres with hierarchical structure and research on their enhanced performance in lithium ion batteries

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