• 专利标题:   Method for preparing graphene, involves preparing raw material graphite paper for preparing graphene, electrochemical puffing, cutting paper into electrode sheet, placing in electrolytic cell, and controlling air pressure as negative pressure.
  • 专利号:   CN114291809-A
  • 发明人:   ZHANG P
  • 专利权人:   NANJING DAWENXI NEW MATERIAL CO LTD
  • 国际专利分类:   C01B032/19, C01B032/194
  • 专利详细信息:   CN114291809-A 08 Apr 2022 C01B-032/19 202243 Chinese
  • 申请详细信息:   CN114291809-A CN10067061 20 Jan 2022
  • 优先权号:   CN10067061

▎ 摘  要

NOVELTY - The method involves preparing a raw material. A graphite paper is cut into an electrode sheet. Air pressure is controlled as negative pressure. An electrochemical swelling of flocculent graphite intercalation compound is placed in a low pressure swelling container under the low pressure instantaneous heating expansion peeling. A product is filtered and cleaned after swelling, remove agent of a residue. The cleaned raw material is put into a colloid mill device for grinding, after grinding, sieving with 100-400 meshes sieve. A grinded product is transferred into the ultrasonic machine. A dry cleaned precipitate is dried in the dry. Powder is put after finishing the dry in the puffing machine for microwave puffing and obtaining high-purity graphene. USE - Method for preparing a graphene. ADVANTAGE - The method enables preparing graphene, which has high quality, high purity, high heat-conducting graphite paper and ultra-flexible graphite papers, improves efficiency of an electrochemical expansion and reduces a layer number of a graphite by secondary microwave puffing, thus realizing a less layer number graphene peeling. The method enables controlling a number of peeling, which is better for controlling shape, improves quality of the graphene and controls air pressure as negative pressure, thus controlling a number and shape of a peeling for limiting a rule. DESCRIPTION OF DRAWING(S) - The drawing shows a flow diagram illustrating a method for preparing graphene. (Drawing includes non-English language text).