• 专利标题:   Preparing nitrogen-doped porous reduced graphene oxide useful in potassium ion battery, comprises preparing graphene oxide, making macroscopic graphene body, hydrothermal reacting, freeze-drying, calcining, pickling, washing and drying.
  • 专利号:   CN113651320-A
  • 发明人:   CHEN Y, WANG W, ZHANG Z
  • 专利权人:   SHENZHEN AUTOMOTIVE BEIJING RES INST
  • 国际专利分类:   C01B032/184, C01B032/194, H01M010/054, H01M010/54, H01M004/587
  • 专利详细信息:   CN113651320-A 16 Nov 2021 C01B-032/184 202221 Chinese
  • 申请详细信息:   CN113651320-A CN11212436 19 Oct 2021
  • 优先权号:   CN11212436

▎ 摘  要

NOVELTY - Preparing nitrogen-doped porous reduced graphene oxide by recycling waste lithium ion battery anode graphite material comprises preparing graphene oxide by using graphite material from negative electrode of a waste lithium ion battery, using graphene oxide, nitrogen source, activator and water as raw materials, making macroscopic graphene body through constant temperature reaction, hydrothermal reaction, and freeze-drying, calcining, pickling, washing with water, and drying macroscopic graphene body to obtain nitrogen-doped porous reduced graphene oxide. The nitrogen source includes melamine, thiourea, polyaniline, ammonium chloride, urea, phenanthroline, biuret, ammonium nitrate and/or dicyandiamide, the activator includes potassium hydroxide, sodium hydroxide, potassium bicarbonate, phosphoric acid, zinc chloride, potassium acetate and/or potassium oxalate. The acid used in pickling includes acetic acid, nitric acid, carbonic acid and/or phosphoric acid. USE - The method is useful for preparing nitrogen-doped porous reduced graphene oxide in potassium ion battery (claimed). ADVANTAGE - The method: fully utilizes expanded layer spacing of graphite material for negative electrode of waste lithium ion battery; provides loose, porous, and large interlayer spacing nitrogen-doped reduced graphene oxide. The oxide has long-range ordered structure, which is conducive to maintaining a stable structure during ion intercalation process and improving electrochemical performance of material prepared from recycled graphite. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: nitrogen-doped porous reduced graphene oxide, prepared by above method. use of nitrogen-doped porous reduced graphene oxide in potassium ion battery. cathode, comprising nitrogen-doped porous reduced graphene oxide.