• 专利标题:   Lithium ion battery positive electrode slurry used for preparing positive electrode sheet comprises solvent and solid material comprising graphene powder, lithium iron phosphate and polyvinylidene fluoride.
  • 专利号:   CN107256966-A
  • 发明人:   GAO P, MA Y, GE M, CONG X, ZHANG Y, ZHANG L, ZHANG J, QU Y
  • 专利权人:   SIXTH ELEMENT CHANGZHOU MATERIALS TECHNO
  • 国际专利分类:   H01M010/0525, H01M004/131, H01M004/136, H01M004/1397, H01M004/58, H01M004/62
  • 专利详细信息:   CN107256966-A 17 Oct 2017 H01M-004/58 201778 Pages: 13 Chinese
  • 申请详细信息:   CN107256966-A CN10348610 17 May 2017
  • 优先权号:   CN10348610

▎ 摘  要

NOVELTY - A lithium ion battery positive electrode slurry comprises solid material and solvent. The solid material comprises 0.7-2 wt.%, preferably 0.7 wt.% graphene powder, lithium iron phosphate and polyvinylidene fluoride. USE - Lithium ion battery positive electrode slurry used for preparing positive electrode sheet (claimed). ADVANTAGE - The positive electrode slurry has low resistivity of 2.1 ohm.cm, and self-potential resistivity of lower than 7%. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: (1) preparation of positive electrode slurry comprising dissolving polyvinylidene fluoride in 67-82% of solvent at 30-40 degrees C for 0.5-1 hour, adding graphene powder, stirring for 1-1.5 hours, adding to the cathode material, adding remaining solvent, and stirring for 0.5-1 hour; and (2) preparation of lithium ion battery positive electrode sheet c2omprising coating positive electrode slurry into aluminum foil, drying, pressing, and cutting.