Silicon oxide-carbon composite, method of manufacturing the composite, and energy storage device having the composite

Patent metadata

Field	Value
Publication number	US-10763496-B2
Application number	US-201815968682-A
Country	US
Kind code	B2
Filing date	May 1, 2018
Priority date	Feb 10, 2014
Publication date	Sep 1, 2020
Grant date	Sep 1, 2020

Abstract

Provided are a silicon oxide-carbon composite, a method of preparing the same, and an energy storage device containing the same. In the method of preparing a silicon oxide-carbon composite, a reaction solution containing an organic solvent including an aromatic compound is provided. Crystalline carbon structures are formed by generating plasma in the reaction solution. A slurry is formed by adding silicon halide and a polyol in the reaction solution in which the crystalline carbon structures are dispersed. The slurry is separated from the organic solvent and subjected to thermal treatment.

First claim

What is claimed is:

1. A method of preparing a silicon oxide-carbon composite, comprising:
providing a reaction solution containing an organic solvent including an aromatic compound;
forming a slurry by adding silicon halide and a polyol to the reaction solution, wherein the slurry has a network structure having Si—O bond formed by the reaction between the silicon halide and the polyol;
removing the organic solvent from the slurry to obtain gel powder; and
performing thermal treatment on the gel powder to obtain the silicon oxide-carbon composite.

2. The method according to claim 1 , wherein the silicon halide is represented by Formula 1:
SiR 1 n X 4-n   [Formula 1]

where X is Cl, Br or I, R 1 is hydrogen, methyl, ethyl or propyl, and n is 0, 1 or 2.

3. The method according to claim 1 , wherein the polyol is represented by Formula 2:
R 2 (OH) m   [Formula 2]

where R 2 is an C1 to C6 alkyl group, an C6 to C18 aryl group or an C6 to C18 alkylaryl group, and m is an integer of 2 to 4.

4. The method according to claim 3 , wherein the polyol includes ethylene glycol, propyleneglycol, butyleneglycol, pinacol, resorcinol, or bisphenol A.

5. The method according to claim 1 , wherein the reaction between the silicon halide and the polyol in the forming of the slurry is an exothermic reaction.

6. The method according to claim 1 , wherein the thermal treatment is performed at a temperature of 450 to 1000° C.

7. The method according to claim 1 , wherein the thermal treatment is performed under an inert gas atmosphere including hydrogen.

8. The method according to claim 1 , wherein the aromatic compound includes benzene, biphenyl, naphthalene, anthracene or a combination of at least two thereof.

9. The method according to claim 1 , further comprising generating plasma in the reaction solution before adding the silicon halide and the polyol in the reaction solution, which causes to form crystalline carbon structures.

10. The method according to claim 9 , wherein the reaction solution further includes a catalyst along with the organic solvent, and the catalyst includes an organic metal compound, a sulfur-containing compound or a combination thereof.

11. The method according to claim 10 , wherein the organic metal compound includes metallocene.

12. The method according to claim 11 , wherein the metallocene includes ferrocene, nickelocene, cobaltocene or ruthenocene.

13. The method according to claim 11 , wherein the metallocene in the reaction solution is contained at 1 to 10 parts by weight with respect to 100 parts by weight of the organic solvent.

14. The method according to claim 10 , wherein the sulfur-containing compound includes thiophene, dibenzothiophene, diphenyldisulfide, hydrogen sulfide, diallyl sulfide, allyl methyl sulfide, or a combination thereof.

15. The method according to claim 10 , wherein the sulfur-containing compound in the reaction solution is contained at 1 to 10 parts by weight with respect to 100 parts by weight of the organic solvent.

16. The method according to claim 9 , wherein the reaction solution's temperature is maintained at approximately boiling point of the aromatic compound when the plasma is generated in the reaction solution.

Assignees

• Industry Academia Cooperation Group Of Sejong Univ
• Ind Academia Cooperation Group Of Sejong Univ

Inventors

• Kim Sun Jae
• Jung Hee June
• Yun Kang Seop
• Noh Eul

Classifications

• C01B33/18

  Preparation of finely divided silica neither in sol nor in gel form; After-treatment thereof (preparation of aerogels by dehydrating gels C01B33/158; treatment to enhance the pigmenting or filling properties C09C) · CPC title

• H01M4/485

  of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy (H01M4/505, H01M4/525 take precedence) · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title

• C01B32/05 Primary

  Preparation or purification of carbon not covered by groups C01B32/15, C01B32/20, C01B32/25, C01B32/30 · CPC title

• H01M4/58

  of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates · CPC title