• 专利标题:   Preparing honeycomb-shaped multilayer graphene, comprises mixing potassium persulfate, phosphorus pentoxide and concentrated sulfuric acid, adding crystalline flake graphite, and mixing pre-oxidized graphite and sodium nitrate, and concentrated sulfonate and reacting to obtain precursor solution.
  • 专利号:   CN116002673-A
  • 发明人:   LIU J, ZHU Y, ZHAO R, PENG Y, QIU X, WU X
  • 专利权人:   EVE ENERGY CO LTD
  • 国际专利分类:   B82Y030/00, B82Y040/00, C01B032/19, H01M010/054, H01M004/583
  • 专利详细信息:   CN116002673-A 25 Apr 2023 C01B-032/19 202344 Chinese
  • 申请详细信息:   CN116002673-A CN10059632 16 Jan 2023
  • 优先权号:   CN10059632

▎ 摘  要

NOVELTY - Preparing honeycomb multilayer graphene-like foam cathode material comprises (a) mixing potassium persulfate, phosphorus pentoxide and concentrated sulfuric acid, adding crystalline flake graphite, reacting to obtain pre-oxidized graphite; (b) mixing the pre-oxygenated graphite obtained in step (a), sodium nitrate and concentrated sulfonate, cooling and dropping concentrated sulfuric acid and adding potassium permanganate in batches, reacting, cooling to obtain precursor solution; (c) adding precursor solution in batches to deionized water, reacting and adding hydrogen peroxide, then adding deionizing water and cooling, after the cooling liquid is processed to obtain multi-layer oxidation graphene foam; (d) oxidizing the multi-layered graphene foam, cross-linking agent and solvent, adding sodium citrate pentahydrate to stir, obtaining crosslinking material after reaction, washing the crosslinker material to obtain dispersion liquid and freezing and drying the dispersion liquid . USE - The cathode is used in lithium ion battery and in solar cell. ADVANTAGE - Compared with traditional graphene materials, the number of layers of the honeycomb-shaped multi-layer graphene-like foam is controlled between 10-30 layers, which is much higher than the number of layers of graphene. At the same time, the above-mentioned cathode material has a honeycomb-like morphology, and has both the energy storage characteristics of graphene and graphite, so that it can obtain high energy density in the process of sodium storage and potassium storage. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: cathode sheet; and lithium ion battery.