• 专利标题:   Method for preparing titanate and graphene composite electrode material, involves dissolving surfactant, and lithium ions in deionized water, mixing graphene solution with lithium titanate and mixing obtained solutions with binder.
  • 专利号:   CN102569769-A, CN102569769-B
  • 发明人:   DU H, HE Y, KANG F, LI B, NING F, YANG Q
  • 专利权人:   UNIV TSINGHUA SHENZHEN GRADUATE SCHOOL
  • 国际专利分类:   H01M004/38, H01M004/485
  • 专利详细信息:   CN102569769-A 11 Jul 2012 H01M-004/485 201277 Chinese
  • 申请详细信息:   CN102569769-A CN10043030 24 Feb 2012
  • 优先权号:   CN10043030

▎ 摘  要

NOVELTY - A titanate and graphene composite electrode material preparing method involves dissolving surfactant, a templating agent and a lithium ions in deionized water to obtain solution A. Graphene solution is mixed with lithium titanate and placed in ultrasound to obtain solution B. The solution A is mixed with solution B under ultrasonic wave, and the binder is added to mixture to obtain solution C. The obtained solution C is transferred to a polytetrafluoroethylene reaction kettle. The resulting solution mixture is subjected to suction filtration, washed, dried, and sintered and cooled. USE - Method for preparing titanate and graphene composite electrode material. ADVANTAGE - The composite electrode material has improved electronic conductivity and ionic conductivity, and better high magnification charge-discharge characteristics. DETAILED DESCRIPTION - A titanate and graphene composite electrode material preparing method involves dissolving surfactant, a templating agent and a lithium ions in deionized water to obtain a solution containing lithium ions A (0.1-5 mol/l), where the molar ratio of surfactant and lithium ions is from 0.1-1:1, and the templating agent and lithium ions is 0.05- 0.5:1. Graphene solution (0.1-0.5 g/l) is mixed with lithium titanate compound at a ratio of 1-30:100, placed in ultrasound for 15-30 minutes and stirred for 1-3 hours, to obtain solution containing titanium ions B (0.1-5 mol /l). The solution A is mixed with solution B under ultrasonic wave at a ratio of 0.05-0.5:1 and stirred for 5-60 minutes, and the binder is added to the mixture to obtain solution C. The obtained solution C is transferred to a polytetrafluoroethylene reaction kettle and placed in an oven at 140-200 degrees C for 12-72 hours. The resulting solution mixture is subjected to suction filtration, washed, dried, and finally sintered under argon gas atmosphere at 500-800 degrees C for 2-24 hours, and cooled to obtain titanate and graphene composite electrode material.