• 专利标题:   Lithium ion positive pole material for lithium-ion battery, comprises lithium iron phosphate, binder, N-methylpyrrolidone and conductive agent comprising conductive carbon black, conductive graphite, graphene and carbon nanotube.
  • 专利号:   CN105514388-A
  • 发明人:   HUANG D, LIANG Y
  • 专利权人:   OCELL NEW ENERGY TECHNOLOGY CO LTD
  • 国际专利分类:   C01B025/26, C01B025/45, H01M010/0525, H01M004/36, H01M004/58, H01M004/60, H01M004/62
  • 专利详细信息:   CN105514388-A 20 Apr 2016 H01M-004/36 201658 Pages: 6 English
  • 申请详细信息:   CN105514388-A CN10011457 08 Jan 2016
  • 优先权号:   CN10011457

▎ 摘  要

NOVELTY - A lithium ion positive pole material comprises 91.0-94.2 %mass lithium iron phosphate, 2.8-5.5 %mass conductive agent, 2-2.5 %mass binder and N-methylpyrrolidone. Conductive agent is a mixture of conductive carbon black, conductive graphite, graphene and carbon nanotube. The binder is polyvinylidene fluoride. USE - Lithium ion positive pole material for lithium-ion battery. ADVANTAGE - The battery energy density and structural stability are improved. The agglomeration is prevented and product quality is improved. The mixing time and the amount of water for mixing process are reduced. The coating efficiency is improved. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of lithium ion positive pole material, which involves mixing N-methylpyrrolidone and polyvinylidene fluoride and stirring for 4 hours to obtain a mixture (A), mixing conductive agent with lithium iron phosphate powder in blender, to obtain a mixture (B), adding the mixture (B) with mixture 1/2 of the mixture (A), and stirring for 1 hour to obtain a mixture (C), adding mixture (B) to 1/4 of the mixture (C), and stirring for 1 hour to obtain a mixture (D), adding 1/4 of mixture (B) with mixture (D), and stirring for 5 hours, to obtain lithium ion positive pole material.