• 专利标题:   Preparation of nitrogen-doped graphene used as supercapacitor material, involves ultrasonically, mechanically and/or thermally treating fluorinated graphite dispersion, contacting azide reagent, and dialyzing obtained product against water.
  • 专利号:   EP3907184-A1, WO2021223783-A1, EP3907184-A4, CA3176634-A1, IL297995-A, EP4146593-A1, US2023159335-A1, JP2023525261-W
  • 发明人:   OTYEPKA M, BAKANDRITSOS A, SEDAJOVA V, JAKUBEC P
  • 专利权人:   UNIV PALACKEHO V OLOMOUCI, UNIV PALACKEHO V OLOMOUCI, UNIV PALACKEHO V OLOMOUCI, UNIV PALACKEHO V OLOMOUCI
  • 国际专利分类:   C01B032/19, C01B032/194, H01G011/30, H01M004/02, H01G011/36, H01G011/86
  • 专利详细信息:   EP3907184-A1 10 Nov 2021 C01B-032/19 202193 Pages: 22 English
  • 申请详细信息:   EP3907184-A1 EP173178 06 May 2020
  • 优先权号:   EP173178, CA3176634

▎ 摘  要

NOVELTY - Preparation of nitrogen-doped graphene involves providing a dispersion of fluorinated graphite, ultrasonically processing, mechanically treating and/or thermally treating the dispersion, contacting the obtained product with an azide reagent at 40-200 degrees C, separating the formed solid product from the mixture, and dialyzing the obtained product against water. USE - Preparation of nitrogen-doped graphene used as supercapacitor material in electrical cell (all claimed). ADVANTAGE - The method produces graphene with high nitrogen doping and some residual fluorine content. The supercapacitor electrodes obtained using the nitrogen-doped graphene has high volumetric energy density at a high power density and high capacitance cycle stability. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) nitrogen-doped graphene, which contains at least 8.9 atomic% nitrogen and up to 16.6 atomic% fluorine with respect to total atoms present in the sample as determined by X-ray photoelectron spectroscopy (XPS) using an aluminum source (Al-K alpha ). The nitrogen-doped graphene has a density of above 1 g/cm3 when pressed at 80 kN for 1 minute; and (2) electrical cell, which comprises at least two electrodes, a separator and an electrolyte. At least one electrode contains the nitrogen-doped graphene.