Title:
INTERMEDIATE FOR PREPARATION OF POROUS SILICON OXYCARBIDE, PREPARATION METHOD THEREFOR, AND LITHIUM SECONDARY BATTERY COMPRISING POROUS SILICON OXYCARBIDE PREPARED THEREFROM AS ANODE ACTIVE MATERIAL
Document Type and Number:
WIPO Patent Application WO/2022/005064
Kind Code:
A1
Abstract:
The present invention relates to an intermediate for preparation of porous silicon oxycarbide, a preparation method therefor, and a lithium secondary battery comprising porous silicon oxycarbide prepared therefrom as an anode active material. According to the present invention, an intermediate prepared by addition of POSS to a reaction mixture for silicon oxycarbide preparation, which is composed of a polysiloxane polymer and an aromatic compound, is pyrolyzed to produce porous silicon oxycarbide (SiOC), so that even though the porous silicon oxycarbide has a small content of free carbon regions compared with conventional silicon oxycarbide, a cage-shaped structure of the POSS is maintained at a pyrolysis stage to form many pores uniformly distributed in the SiOC matrix, thereby enabling the quick diffusion of electrolyte ions, and the contents of SiO3C and SiO2C2 are increased in the SiOC matrix to improve reversible capacity in the Si-O-C phase.
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Inventors:
AHN HEE JOON (KR)
LEE SE HUN (KR)
PARK CHANG YOUNG (KR)
DO KWANG HYUN (KR)
LEE SE HUN (KR)
PARK CHANG YOUNG (KR)
DO KWANG HYUN (KR)
Application Number:
PCT/KR2021/007645
Publication Date:
January 06, 2022
Filing Date:
June 18, 2021
Export Citation:
Assignee:
IUCF HYU (KR)
International Classes:
C08G77/04; C01B32/907; C01B32/977; C08G77/12; C08G77/18; C08G77/20; C08G77/50; H01M4/58; H01M10/0525
Foreign References:
| KR20170133736A | 2017-12-06 | |||
| KR20170073960A | 2017-06-29 | |||
| JP6183362B2 | 2017-08-23 | |||
| KR101348107B1 | 2014-01-07 |
Other References:
HASIK MAGDALENA; WÓJCIK-BANIA MONIKA; NYCZYK ANNA; GUMUłA TER: "Polysiloxane–POSS systems as precursors to SiCO cera", REACTIVE AND FUNCTIONAL POLYMERS, ELSEVIER, AMSTERDAM, NL, vol. 73, no. 5, 16 March 2013 (2013-03-16), AMSTERDAM, NL , pages 779 - 788, XP028580842, ISSN: 1381-5148, DOI: 10.1016/j.reactfunctpolym.2013.03.006
PONOMAREV ILIA, VAN DUIN ADRI C. T., KROLL PETER: "Reactive Force Field for Simulations of the Pyrolysis of Polysiloxanes into Silicon Oxycarbide Ceramics", THE JOURNAL OF PHYSICAL CHEMISTRY C, AMERICAN CHEMICAL SOCIETY, US, vol. 123, no. 27, 11 July 2019 (2019-07-11), US , pages 16804 - 16812, XP055884806, ISSN: 1932-7447, DOI: 10.1021/acs.jpcc.9b03810
ŻAK P., MAJCHRZAK M., WILKOWSKI G., DUDZIEC B., DUTKIEWICZ M., MARCINIEC B.: "Synthesis and characterization of functionalized molecular and macromolecular double-decker silsesquioxane systems", RSC ADVANCES, vol. 6, no. 12, 1 January 2016 (2016-01-01), pages 10054 - 10063, XP055884808, DOI: 10.1039/C5RA20848C
PONOMAREV ILIA, VAN DUIN ADRI C. T., KROLL PETER: "Reactive Force Field for Simulations of the Pyrolysis of Polysiloxanes into Silicon Oxycarbide Ceramics", THE JOURNAL OF PHYSICAL CHEMISTRY C, AMERICAN CHEMICAL SOCIETY, US, vol. 123, no. 27, 11 July 2019 (2019-07-11), US , pages 16804 - 16812, XP055884806, ISSN: 1932-7447, DOI: 10.1021/acs.jpcc.9b03810
ŻAK P., MAJCHRZAK M., WILKOWSKI G., DUDZIEC B., DUTKIEWICZ M., MARCINIEC B.: "Synthesis and characterization of functionalized molecular and macromolecular double-decker silsesquioxane systems", RSC ADVANCES, vol. 6, no. 12, 1 January 2016 (2016-01-01), pages 10054 - 10063, XP055884808, DOI: 10.1039/C5RA20848C
Attorney, Agent or Firm:
E-SANG PATENT & TRADEMARK LAW FIRM (KR)
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