• 专利标题:   Preparing self-supporting graphene/sulfur anode sheet by electrochemical process comprises e.g. polishing the glassy carbon electrode with alumina powder, adding acetone, ethanol and nitric acid, ultrasonic cleaning and volatilizing.
  • 专利号:   CN108767210-A
  • 发明人:   YANG R, CHEN L, XU Y, YAN Y, ZOU Y, DENG Q, FAN C
  • 专利权人:   UNIV XIAN TECHNOLOGY
  • 国际专利分类:   H01M004/36, H01M004/38, H01M004/583, H01M010/052
  • 专利详细信息:   CN108767210-A 06 Nov 2018 H01M-004/36 201902 Pages: 11 Chinese
  • 申请详细信息:   CN108767210-A CN10389128 27 Apr 2018
  • 优先权号:   CN10389128

▎ 摘  要

NOVELTY - Preparing self-supporting graphene/sulfur anode sheet by electrochemical process comprises e.g. (i) polishing the glassy carbon electrode with alumina powder, adding into acetone, ultrasonic cleaning in ethanol and nitric acid, activating in sulfuric acid solution, and repeating scanning until the cyclic voltammogram is stable; (ii) applying colloidal graphene oxide to the surface of the glassy carbon electrode, and freeze-drying, (iii) taking the glassy carbon electrode coated with graphene oxide as working electrode, and reducing of graphene oxide by electrochemical method, rinsing with deionized water and set aside, (iv) ultrasonically stripping the electrochemically reduced graphene oxide from the surface of the glassy carbon electrode and freeze-drying, and (v) dissolving sublimed sulfur in carbon disulfide, uniformly adding the sublimed sulfur carbon disulfide solution into the electrochemically reduced graphene oxide, and volatilizing the carbon disulfide. USE - The method is useful for preparing self-supporting graphene/sulfur anode sheet by electrochemically. ADVANTAGE - The reduced graphene oxide: does not have chemical reducing reagent; is highly efficient and uniform; and is ideal preparation method of anode material. DETAILED DESCRIPTION - Preparing self-supporting graphene/sulfur anode sheet by electrochemical process comprises (i) polishing the glassy carbon electrode with alumina powder, adding into acetone, ultrasonic cleaning in ethanol and nitric acid, activating in sulfuric acid solution, and repeating scanning until the cyclic voltammogram is stable; (ii) applying colloidal graphene oxide to the surface of the glassy carbon electrode obtained in step (i), and freeze-drying, (iii) taking the glassy carbon electrode coated with graphene oxide obtained in step (ii) as working electrode, and reducing of graphene oxide by electrochemical method, rinsing with deionized water and set aside, (iv) ultrasonically stripping the electrochemically reduced graphene oxide obtained in step (iii) from the surface of the glassy carbon electrode and freeze-drying, and (v) dissolving sublimed sulfur in carbon disulfide, uniformly adding the sublimed sulfur carbon disulfide solution into the electrochemically reduced graphene oxide obtained in the step (iv), and volatilizing the carbon disulfide to obtain final product.