• 专利标题:   Preparation of graphene film used in self-supporting flexible supercapacitor electrode, involves preparing graphene nanosheets, preparing graphene slurry having preset viscosity, and patterning self-supporting graphene film.
  • 专利号:   CN114684814-A
  • 发明人:   SHI J, LIU Y, TIAN W, ZHANG L, WANG Q
  • 专利权人:   UNIV JIANGSU
  • 国际专利分类:   B05D007/24, B23K026/38, C01B032/19, C01B032/194, H01G011/36, H01G011/86
  • 专利详细信息:   CN114684814-A 01 Jul 2022 C01B-032/19 202282 Chinese
  • 申请详细信息:   CN114684814-A CN10433376 24 Apr 2022
  • 优先权号:   CN10433376

▎ 摘  要

NOVELTY - Preparation of self-supporting flexible graphene film involves (1) preparing graphene nanosheets with surface oxidation and internal crystallization by regulating and controlling voltage and distance between two graphite electrodes, where an electrolyte is 1 M ammonium sulfate, and the voltage value is ±10 V, placing the two pretreated electrodes oppositely in the electrolyte, where the distance between the electrodes is 3-30 cm, (2) preparing 10-30 mg/mL graphene slurry having a viscosity of 20-30 mPa.seconds by using the prepared graphene nanosheets and deionized water as a solvent, and performing scraper coating and evaporation self-assembly on the surface of a substrate to prepare a self-supporting graphene film, and (3) patterning the graphene film into a self-supporting flexible graphene film in any shape by using a laser engraving machine. USE - Preparation of graphene film used in self-supporting flexible supercapacitor electrode (claimed) of energy storage device e.g. battery. ADVANTAGE - The surface oxidized and inner part crystal of the graphene is easy to process, taking water as solvent to prepare slurry without need of agglomerant, conductive agent. When assembling the flexible self-supporting plane micro super capacitor, without substrate and current collector, which is good for the actual application of the super capacitor.