Liquid exfoliation graphene sheets as catalysts for hybrid sodium-air cells

Feng Liang, Takayuki Watanabe, Katsuro Hayashi, Yaochun Yao, Wenhui Ma, Yang Bin Yang, Yongnian Dai

研究成果: ジャーナルへの寄稿学術誌査読

16 被引用数 (Scopus)


Graphene sheets are prepared by subjecting pyrolytic graphite in acetone to liquid exfoliation with sonication. Pyrolytic graphite is synthesized via arc discharge method. Five-layered graphene sheets are obtained through sonication for 12 h. The synthesized graphene sheets are then used as catalysts for hybrid sodium-air cells. The electrocatalytic activity of the exfoliated graphene sheets toward oxygen reduction reaction (ORR) is higher than that of pyrolytic graphite because of numerous edges and efficient electron communication between active edge sites and electrode substrate in the former. The discharge voltage is held constant at 2.48 V versus Na/Na+ for the exfoliated graphene sheets as the catalyst at a current density of 1 mA cm−2 and room temperature.

ジャーナルMaterials Letters
出版ステータス出版済み - 1月 15 2017

!!!All Science Journal Classification (ASJC) codes

  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学


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