A binary solvent system for improved liquid phase exfoliation of pristine graphene materials

  • Chen J
  • Shi W
  • Fang D
 et al. 
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Up to now, the cost-effective mass production of pristine graphene sheets remains a significant challenge. We report a binary solvent system of dimethylformamide and n-butylalcohol that facilitates the high concentration production of unoxidized graphene through liquid-exfoliation assisted with sonication. A stable dispersion with concentration as high as 6.5 mg/ml, was received via this method. The conductivity of a film made from the graphene sheets had a conductivity of 27,000 S/m. The supercapacitor fabricated by graphene exhibits a giant capacitance of 600 F/g and an outstanding long-term stability.

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  • Jianping Chen

  • Weili Shi

  • Dong Fang

  • Tao Wang

  • Jing Huang

  • Qi Li

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