• 专利标题:   Graphene-dye nanocomposite used in negative electrode material for negative electrode of secondary battery, comprises graphene oxide and water-soluble dye.
  • 专利号:   KR2022018131-A, KR2400456-B1
  • 发明人:   LEEJINHONG, LEESEUNGGOL, KIM E, SEO H J, KANG S, HUN L, UK C, WOONG L T, CHOI I H
  • 专利权人:   UNIV PUSAN NAT IND COOP FOUND
  • 国际专利分类:   C01B032/198, C09B029/01, C09B062/00, H01M010/052, H01M004/139, H01M004/36, H01M004/587, H01M004/60, H01M004/62
  • 专利详细信息:   KR2022018131-A 15 Feb 2022 H01M-004/36 202219 Pages: 14
  • 申请详细信息:   KR2022018131-A KR098091 05 Aug 2020
  • 优先权号:   KR098091

▎ 摘  要

NOVELTY - A graphene-dye nanocomposite comprises graphene oxide and a water-soluble dye. USE - Graphene-dye nanocomposite used in negative electrode material for negative electrode of secondary battery. ADVANTAGE - The three-dimensional graphene-dye nanocomposite has large specific surface area, low electrical resistance, excellent high-efficiency charge/discharge characteristics, electrical conductivity and electrochemical activity and long-term lifespan characteristics, controls the elements doped into the nanocomposite, inhibits the re-stacking and aggregation of graphene by controlling the content, concentration and reaction temperature of graphene oxide and water-soluble dye, and can be prepared without using a dispersant by reducing energy consumption and controlling the temperature and time of the hydrothermal reaction, the three-dimensional structure and specific surface area of the nanocomposite. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) manufacture of graphene-dye nanocomposite, which involves (A1) mixing graphene oxide and a water-soluble dye to prepare a graphene-dye dispersant, (A2) preparing a hydrogel by hydrothermal synthesis of the graphene-dye dispersant, and (A3) lyophilizing the hydrogel to prepare a graphene-dye nanocomposite; (2) negative electrode material, which comprises the graphene-dye nanocomposite; (3) negative electrode, which comprises the negative electrode material; and (4) manufacture of negative electrode, which involves (B1) preparing an anode material by mixing the anode active material, a binder, and carbon black, (B2) coating the negative electrode material on a current collector, and (B3) heat-treating the coating material at 100-150 degrees C.