• 专利标题:   Graphite alkenyl lithium battery positive electrode slurry comprises composite active powder, conductive agent, adhesive and solvent, where composite active powder is prepared by taking ethanol solution to adjust pH value, adding nickel-cobalt-lithium manganese oxide powder and mixing.
  • 专利号:   CN115411243-A
  • 发明人:   LU X, ZHOU Z, WANG C
  • 专利权人:   SHENZHEN LANGTAIBENG ELECTRONIC CO LTD
  • 国际专利分类:   H01M004/04, H01M004/36, H01M004/505, H01M004/525, H01M004/62
  • 专利详细信息:   CN115411243-A 29 Nov 2022 H01M-004/36 202315 Chinese
  • 申请详细信息:   CN115411243-A CN11037538 26 Aug 2022
  • 优先权号:   CN11037538

▎ 摘  要

NOVELTY - Graphite alkenyl lithium battery positive electrode slurry comprises a composite active powder, a conductive agent, an adhesive and a solvent, where the composite active powder is prepared by taking the ethanol solution to adjust the pH value to 8.5-9.5, then adding nickel-cobalt-lithium manganese oxide powder and mixing, refluxing at 68-75℃ for 3-4 hours, then filtering and washing the filter cake, and evaporating to dryness under reduced pressure to make activated active powder. The ethanol solution and acetone are mixed, added activated active powder and stirred ultrasonically at 30kHz, while maintaining ultrasonic stirring, added ammonia water and N-trimethoxysilylpropyl-N,N,N-trimethyl ammonium chloride, after dropping, continue ultrasonic stirred for 1.2-2 hours, then filtered the reaction solution to take the filter cake and dried to make a modified active powder. The modified active powder, carbon nanotubes, nano-graphene and modified graphene are mixed. USE - Graphite alkenyl lithium battery positive electrode slurry. ADVANTAGE - The graphite alkenyl lithium battery positive electrode slurry improves the conductivity and thermal stability of the nickel cobalt lithium manganate and ternary material charging and discharging stability and stability of the battery, and reduces the internal resistance of the positive electrode material to a certain degree. DETAILED DESCRIPTION - Graphite alkenyl lithium battery positive electrode slurry comprises a composite active powder, a conductive agent, an adhesive and a solvent, where the composite active powder is prepared by taking the ethanol solution to adjust the pH value to 8.5-9.5, then adding nickel-cobalt-lithium manganese oxide powder and mixing, refluxing at 68-75℃ for 3-4 hours, then filtering and washing the filter cake, and evaporating to dryness under reduced pressure to make activated active powder. The ethanol solution and acetone are mixed, added activated active powder and stirred ultrasonically at 30kHz, while maintaining ultrasonic stirring, added ammonia water and N-trimethoxysilylpropyl-N,N,N-trimethyl ammonium chloride, after dropping, continue ultrasonic stirred for 1.2-2 hours, then filtered the reaction solution to take the filter cake and dried to make a modified active powder. The modified active powder, carbon nanotubes, nanographene and modified graphene are mixed, added deionized water for ultrasonic dispersion, stand for 24 hours, then poured out the supernatant, removed the concentrated solution of the lower layer and added hydroiodic acid, stirred and reduced. The filter cake is taken out by suction filtration and dried to obtain a product. An INDEPENDENT CLAIM is included for a method for preparing a graphite alkenyl lithium battery positive electrode slurry, which involves: a. pre-mixing the adhesive and the solvent as a kneading liquid; and b. mixing the composite active powder and the conductive agent, adding the kneading liquid and putting into the kneader to make a composite material, and then adding solvent under stirring to adjust the viscosity to 6500±100cP to obtain product.