• 专利标题:   Heterogeneous graphene conductive agent for lithium battery anode material, comprises graphite powder, carbon-containing particles with different structures, dispersant, emulsifier and isomerization agent.
  • 专利号:   CN106450330-A, CN106450330-B
  • 发明人:   CHEN Q, ZENG J, CHEN B, WANG L
  • 专利权人:   CHENGDU NEW KELI CHEM SCI CO LTD
  • 国际专利分类:   C01B032/19, H01M004/62
  • 专利详细信息:   CN106450330-A 22 Feb 2017 H01M-004/62 201733 Pages: 9 Chinese
  • 申请详细信息:   CN106450330-A CN10915652 21 Oct 2016
  • 优先权号:   CN10915652

▎ 摘  要

NOVELTY - A conductive agent comprises 80-95 pts. wt. graphite powder, 5-10 pts. wt. carbon-containing particles with different structures, 0.5-1 pt. wt. dispersant, 0.5-1 pt. wt. emulsifier and 1-2 pts. wt. isomerization agent. The carbon-containing particles are microcrystalline carbon black, carbon nanotubes, carbon fiber, carbon black/aluminum nitride fiber, carbon black/boron nitride microspheres, and/or carbon black/mica slices. The emulsifier is propylene glycol fatty acid ester, potassium stearate, sodium caseinate, polyglycerol monooleate and/or sucrose fatty acid ester. USE - Heterogeneous graphene conductive agent for lithium battery anode material. ADVANTAGE - The conductive agent has firm structure, stable performance and excellent dispersibility, and the battery has multiplying power charging and discharging performance, reduced irreversible capacity generation and increased cycle stability. DETAILED DESCRIPTION - The conductive agent comprises 80-95 pts. wt. graphite powder, 5-10 pts. wt. carbon-containing particles with different structures, 0.5-1 pt. wt. dispersant, 0.5-1 pt. wt. emulsifier and 1-2 pts. wt. isomerization agent. The carbon-containing particles are microcrystalline carbon black, carbon nanotubes, carbon fiber, carbon black/aluminum nitride fiber, carbon black/boron nitride microspheres, and/or carbon black/mica slices. The emulsifier is propylene glycol fatty acid ester, potassium stearate, sodium caseinate, polyglycerol monooleate and/or sucrose fatty acid ester. The isomerization agent is bisphenol F type epoxy resin, polymethylene polyphenyl polyisocyanate, bisphenol A diglycidyl ether, and/or tolylene-2,4-diisocyanate. The heterogeneous conductive agent is ordered mesoporous conductive agent. The conductive agent is prepared by (1) adding graphite powder and dispersant into grinding machine, grinding for 30 minutes, ultrasonic dispersing 40-60 kHz for 2 hours, drying to obtain dispersed graphite, (2) mixing carbon-containing particles, emulsifier and water in high-speed, controlling the stirring speed at 1500-3000 rpm, stirring at 60-80 degrees C for 30-60 minutes to obtain modified carbonaceous particulate emulsion, (3) adding dispersed graphite and isomerization agent into isomerization reactor with appropriate amount of water, controlling the temperature at 80-100 degrees C and pressure at 2-5 MPa, where isomerization reactor is a closed type grinding apparatus, grinding chamber is cylindrical or conical sealed cavity, grinding, adding carbonaceous particulate emulsion, grinding to obtain uniformly dispersed slurry, (4) injecting into the reaction furnace through high-pressure nozzle, performing incomplete combustion, cooling, and separating using cyclone separator.