• 专利标题:   Preparing organic polysulfide polymer-sulfonated graphene conductive composite used as anodic material for lithium secondary battery, involves placing graphite oxide in water solution.
  • 专利号:   CN101728534-A, CN101728534-B
  • 发明人:   JIN L, LI L, LI X, WANG G
  • 专利权人:   UNIV EAST CHINA SCI TECHNOLOGY, UNIV EAST CHINA SCI TECHNOLOGY
  • 国际专利分类:   H01M004/60
  • 专利详细信息:   CN101728534-A 09 Jun 2010 H01M-004/60 201044 Pages: 8 Chinese
  • 申请详细信息:   CN101728534-A CN10200630 24 Dec 2009
  • 优先权号:   CN10200630

▎ 摘  要

NOVELTY - Organic polysulfide polymer-sulfonated graphene conductive composite preparation involves placing graphite oxide in water solution, where pH value of water solution is 9-10. Graphite oxide is reduced by using sodium borohydride at 80 degrees C for 1 hour. Sulfanilic acid diazonium salt is treated with graphite oxide in ice water bath for 3 hours to obtain sulfonated product. The obtained sulfonated product is treated with hydrazine hydrate at 100 degrees C for 24 hours to obtain a reaction product. USE - Method for preparing organic polysulfide polymer-sulfonated graphene conductive composite (claimed) used as anodic material for lithium secondary battery. ADVANTAGE - The method provides organic polysulfide polymer-sulfonated graphene conductive composite, which has excellent electrical chemical performance and high electricity conductivity. DETAILED DESCRIPTION - Organic polysulfide polymer-sulfonated graphene conductive composite preparation involves placing graphite oxide in water solution, where pH value of water solution is 9-10. Graphite oxide is reduced by using sodium borohydride at 80 degrees C for 1 hour. Sulfanilic acid diazonium salt is treated with graphite oxide in ice water bath for 3 hours to obtain sulfonated product. The obtained sulfonated product is treated with hydrazine hydrate at 100 degrees C for 24 hours to obtain a reaction product. The obtained reaction product is washed with deionized water then the washed product is dried to obtain sulfonated graphene. 2,5-Dithio-1,3,4-thiadiazole is mixed to solution of deionized water and alcoholic solvent to obtain a liquid mixture. Sulfonated grapheme is ultrasonically mixed with liquid mixture for 15-30 minutes to obtain a mixture. The obtained mixture is stirred, where stirred mixture is mixed with absolute ethyl alcohol or anhydrous isopropyl alcohol at 20-50 degrees C for 12-48 hours to obtain a liquid mixture. The liquid mixture is filtered to obtain a filtrate then the filtrate is washed and dried to obtain organic polysulfide polymer-sulfonated graphene conductive composite. The alcoholic solvent is selected from ethanol or isopropanol.