• 专利标题:   Preparation of self-supporting nonmetal-doped graphene flexible film electrode useful as electrocatalyst in oxygen evolution reaction, involves scraping graphene oxide suspension slurry on heterogeneous substrate surface, drying, peeling, cutting, and mixing with nonmetal heteroatom doping source.
  • 专利号:   CN114108023-A
  • 发明人:   HOU C, HUANG J, YIN H, WANG W, REN W, HU L, CHEN L
  • 专利权人:   HUNAN INST SCI TECHNOLOGY
  • 国际专利分类:   B82Y030/00, B82Y040/00, C25B001/04, C25B011/04
  • 专利详细信息:   CN114108023-A 01 Mar 2022 C25B-011/04 202269 Chinese
  • 申请详细信息:   CN114108023-A CN11472021 06 Dec 2021
  • 优先权号:   CN11472021

▎ 摘  要

NOVELTY - Preparation of self-supporting nonmetal-doped graphene flexible film electrode, involves slowly adding 1-3 g crystalline flaky graphite to 40-60 mL concentrated sulfuric acid, stirring at normal temperature for 5-10 minutes, slowly adding 4-6 g strong oxidant, stirring for 1-2 hours, reacting to obtain a graphite oxide dispersion, centrifuging the dispersion, cleaning, drying to obtain a graphite oxide solid, dispersing the solid in deionized water, ultrasonically peeling for 1-3 hours to obtain 50-100 g/L graphene oxide suspension slurry, transferring the slurry to a heterogeneous substrate surface, scraping uniformly at 0.2-2 cm/second using a scraper to obtain a graphene oxide film/heterogeneous matrix composite, drying the composite, peeling, cutting to obtain a self-supporting graphene oxide film, and mixing the film with a doping source containing nonmetal heteroatoms in a mass ratio of 1:5-1:15. USE - Preparation of self-supporting nonmetal-doped graphene flexible film electrode useful as electrocatalyst in oxygen evolution reaction (claimed) in metal air batteries and water electrolysis device. ADVANTAGE - The method enables simple preparation of electrode using rich raw material source, on a large scale. The obtained electrode uses nonmetal-doped graphene nanosheet as conductive framework, with good flexibility, large specific surface area, and rich active sites, showing a wide application prospect in electrocatalysis.