公开(公告)号：US20250091879A1

公开(公告)日：2025-03-20

申请号：US18937567

申请日：2024-11-05

Applicant: KOREA ELECTROTECHNOLOGY RESEARCH INSTITUTE

Inventor： Seung Yol JEONG ,  Byeong Guk KIM ,  Ick Jun KIM ,  Sun Hye YANG ,  Geon Woong LEE ,  Hye Jung LEE ,  Soo Yeon JEONG ,  Jung Mo KIM ,  Ji Hyeon RYU ,  Hee Jin JEONG

IPC: C01B32/174

Abstract: The present invention relates to: a method for preparing a non-oxidized carbon nanotube dispersion through mechanical impregnation so as to apply carbon nanotubes having a hydrophobic surface and a bundle shape as a high-performance conductive material of a negative electrode or a positive electrode for a secondary battery through solvent dispersion without acid treatment; and a non-oxidized carbon nanotube dispersion for a conductive material of a secondary battery, prepared by the method.

公开(公告)号：US20200295344A1

公开(公告)日：2020-09-17

申请号：US16891179

申请日：2020-06-03

Applicant: KOREA ELECTROTECHNOLOGY RESEARCH INSTITUTE

Inventor： Seung Yol JEONG ,  Geon Woong LEE ,  Jong Hwan PARK ,  Sun Hye YANG ,  Soo Yeon JEONG ,  Ick Jun KIM ,  Seon Hee SEO ,  Hye Jung LEE ,  Hee Jin JEONG ,  Joong Tark HAN

IPC: H01M4/04 ,  H01M4/583 ,  H01M4/38 ,  H01M4/36 ,  C01B32/198

Abstract: The present invention relates to a reduced-graphene-oxide/silicon-metal-particle composite, a method of manufacturing the composite and an electrode for a secondary battery including the composite. The method of manufacturing the reduced-graphene-oxide/silicon-metal-particle composite includes preparing a reduced-graphene-oxide dispersion solution by reducing graphene oxide formed through cation-pi interaction, preparing a reduced-graphene-oxide/silicon-metal-particle dispersion solution by mixing the reduced-graphene-oxide dispersion solution with silicon metal particles, and manufacturing a composite powder having a core-shell structure by drying the reduced-graphene-oxide/silicon-metal-particle dispersion solution. Thereby, reduced graphene oxide can be formed using the graphene oxide dispersion solution having few defects and high purity obtained through cation-pi interaction, and dried to afford a composite powder having a core-shell structure, which is applicable to an electrode for a secondary battery.

公开(公告)号：US20240182310A1

公开(公告)日：2024-06-06

申请号：US18281554

申请日：2021-11-05

Applicant: KOREA ELECTROTECHNOLOGY RESEARCH INSTITUTE

Inventor： Seung Yol JEONG ,  Sun Hye YANG ,  Geon Woong LEE ,  Ick Jun KIM ,  Byeong Guk KIM ,  Ji Hyeon RYU ,  Hye Jung LEE ,  Soo Yeon JEONG

IPC: C01B32/198 ,  C01B32/225 ,  C01B32/23 ,  H01M4/587

CPC classification number: C01B32/198 ,  C01B32/225 ,  C01B32/23 ,  H01M4/587 ,  C01B2204/04 ,  C01B2204/22 ,  C01B2204/32 ,  C01P2002/84 ,  C01P2002/88 ,  C01P2004/04 ,  C01P2004/61 ,  C01P2006/12 ,  C01P2006/40

Abstract: The present disclosure relates to a reduced graphene oxide for a secondary battery, a method for preparing the same, an electrode using the same, and a secondary battery using the same. Specifically, the reduced graphene oxide is a powdery two-dimensional crystalline reduced graphene oxide satisfying Relational Expressions 1 to 3 shown below. [Relationship 1] 1≤TQ≤5 [relational expression 2] 100≤EQ≤1,000 [Relationship 3]1≤BETQ≤100. In Relational Expression 1, TQ represents the thickness (nm) of the reduced graphene oxide. In Relational Expression 2, EQ represents the electrical conductivity (S/cm) of the reduced graphene oxide. In Relational Expression 3, BETQ represents the specific surface area (m2/g) of the reduced graphene oxide.