• 专利标题:   Batch preparation of oily perforated graphene conductive agent for lithium ion battery, involves mixing expanded graphite and potassium hydroxide powder, introducing carbon dioxide gas into air for activation reaction, adding N-methylpyrrolidone and obtained powder, stirring, and dispersing.
  • 专利号:   CN113955744-A
  • 发明人:   GENG Y, LV M, OUYANG Z, HAN S
  • 专利权人:   TIANJIN AIKE KAISHENG GRAPHENE TECHNOLOG
  • 国际专利分类:   B82Y030/00, B82Y040/00, C01B032/19, H01M010/0525, H01M004/62
  • 专利详细信息:   CN113955744-A 21 Jan 2022 C01B-032/19 202229 Chinese
  • 申请详细信息:   CN113955744-A CN11032897 03 Sep 2021
  • 优先权号:   CN11032897

▎ 摘  要

NOVELTY - Batch preparation of oily perforated graphene conductive agent involves (1) mixing expanded graphite and potassium hydroxide powder in a ratio of 1:3, and sending the blended expanded graphite into an activation furnace for initial treatment of activation reaction, (2) introducing carbon dioxide gas into air at an air intake rate of 3-5 L/minute for activation reaction and reprocessing, and obtaining a powder after a constant temperature of 1000degrees Celsius for 4-5 hours, (3) adding N-methylpyrrolidone and the obtained powder into the reactor, introducing nitrogen gas into air at an air intake rate of 1-2 L/hour, and stirring and dispersing simultaneously at a stirring speed of 90-110 rpm and a dispersing rotation speed of 1100-1200 rpm to obtain a dispersed material, (4) redispersing the dispersed material by shearing and peeling to obtain a redispersed material, (5) fully peeling off the redispersed material, and (6) repeating the steps (4) and (5) 4-6 times. USE - Batch preparation method of oily perforated graphene conductive agent for lithium ion battery. ADVANTAGE - The method can prepare oil punching graphene conductive agent with uniform holes in batch.