Silicon oxide for anode of secondary battery, method for preparing the same and anode of secondary battery using the same
AssigneeYeil Electronics Co., Ltd.
InventorYun-Kyu Kang
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Abstract
Provided is a silicon oxide for an anode of a secondary battery, having a good mechanical lifespan and electrical properties, and a method for preparing the same and an anode of a secondary battery using the silicon oxide. According to the method, a mixture is prepared by mixing SiCl4 and ethylene glycol, a gel is manufactured by stirring the mixture, and the gel is heat treated to prepare silicon oxide for an anode of a secondary battery.
Claims8
A method for preparing silicon oxide for an anode of a secondary battery comprising:
- preparing a mixture by mixing SiCl4 and ethylene glycol at 10:90 to 70:30 by volume;
- manufacturing a gel by stirring the mixture at 50° C. to 300° C. for 2 to 72 hours;
- and
- heat treating the gel at 500° C. to 1,000° C.
Silicon oxide for an anode of a secondary battery having a particle size of 50 to 150 nm, wherein the silicon oxide is prepared by a method comprising:
- preparing a mixture by mixing SiCl4 and ethylene glycol at 10:90 to 70:30 by volume;
- manufacturing a gel by stirring the mixture at 50° C. to 300° C. for 2 to 72 hours;
- and
- heat treating the gel at 500° C. to 1,000° C.
An anode of a secondary battery comprising a SiOx-C complex phase in which carbon particles surround a surface of silicon oxide having a particle size of 50 to 150 nm, wherein the SiOx-C complex phase is manufactured by mixing the silicon oxide prepared by a method comprising:
- preparing a mixture by mixing SiCl4 and ethylene glycol at 10:90 to 70:30 by volume;
- manufacturing a gel by stirring the mixture at 50° C. to 300° C. for 2 to 72 hours;
- and
- heat treating the gel at 500° C. to 1,000° C.,
- with at least one carbon material of graphite, pitch, graphene and carbon nanotubes (CNT) by ball milling at 100 to 1,000 rpm, and heat treating at 500° C. to 900° C. for 10 minutes to 5 hours.
Dependencies are inferred from the claim text.