POROUS Co3O4 NANOPARTICLES AND METHOD FOR PREPARING THE SAME
AssigneeIndustry-Academic Cooperation Foundation, Yonsei University
InventorsHYUNG MO JEONG, Kyu Hyoung Lee
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Abstract
The disclosure relates to porous Co3O4 nanoparticles which include flocculated amorphous primary nanoparticles, with air pores formed between the amorphous primary nanoparticles. The porous Co3O4 nanoparticles, according to an embodiment of the disclosure, may be in the form of flocculated amorphous primary nanoparticles of 1 nm or less, have a 400 times larger specific surface area than the conventional Co3O4 particles, and address the issue with the expansion of Co3O4 lattices which may arise when the battery is charged or discharged, thereby providing more reliability when applied to batteries.
Claims13
Porous Co3O4 nanoparticles configured in a form of flocculated amorphous primary nanoparticles represented as chemical formula 1, wherein air pores are formed between the amorphous primary nanoparticles, wherein
- Co3O4-x [Chemical formula 1]
- wherein 0≤x≤0.4.
Porous Co3O4 nanoparticles prepared by forming primary nanoparticles in such a manner as to separate Co clusters by injecting positive ions into lattices of crystalline Co3O4 particles while simultaneously allowing the primary nanoparticles to transition to an amorphous phase.
A method for preparing porous Co3O4 nanoparticles, the method comprising:
- placing a Co3O4 thin film layer and an ion generation layer on two opposite surfaces of a separation plate;
- and
- applying a voltage to the Co3O4 thin film layer and the ion generation layer, wherein the ion generation layer includes an alkaline metal, an alkaline earth metal, an alkaline metal-containing alloy, or an alkaline earth metal-containing alloy.
Dependencies are inferred from the claim text.