• 专利标题:   Preparing metastable graphene film used for e.g. battery capacitor, involves heating graphene oxide film for reducing defect of graphene oxide film, maintaining non-AB structure, increasing temperature, and dripping to specific temperature.
  • 专利号:   CN111661840-A
  • 发明人:   PENG L, GAO C
  • 专利权人:   HANGZHOU GAOXI TECHNOLOGY CO LTD
  • 国际专利分类:   C01B032/184
  • 专利详细信息:   CN111661840-A 15 Sep 2020 C01B-032/184 202084 Pages: 7 Chinese
  • 申请详细信息:   CN111661840-A CN10563718 19 Jun 2020
  • 优先权号:   CN10563718

▎ 摘  要

NOVELTY - Method for preparing metastable graphene film, involves (a) heating graphene oxide film at less than 1800-2100 degrees C at a heating rate of less than or equal to 100 degrees C/minute, and maintaining the temperature for 4-16 hours for reducing the defect of graphene oxide film to less than 0.5%, and maintaining non-AB structure, and (b) increasing the temperature to 2300-2400 degrees C at a heating rate of greater than or equal to 60 degrees C/minute, and dripping below 1800 degrees C within 10 minutes to obtain the metastable graphene film. USE - The film is used for high-performance optoelectronic device, fast high-capacity storage device, battery capacitor and other energy storage device. ADVANTAGE - The method utilizes simple thermodynamic unit, controls the sintering temperature and time, and the film has both stability and weakly coupled electron cloud state of disordered layer graphite or graphene.