氟化石墨烯用作一次锂电池正极材料的性能

摘要

A free_standing fluorinated graphene ( F_graphene ) was fabricated by the simple liquid exfoliation of a fluorinated graphite ( F_graphite) in a 2_propanol/water mixture, and was used as the cathode material of primary lithium ion batteries. As_pre_pared F_grapheneh as a very high fluorine content (49. 7 at%), and an amorphous_like two_dimensional nanostructure. These fea_tures facilitate the rapid diffusion of lithium ions during discharging. The F_graphene exhibits better electrochemical performance, especially, a higher specific power density than the F_graphite.%以异丙醇/水、氟化石墨分别作试剂和原料，采用液相剥离法制备出氟化石墨烯。所制氟化石墨烯呈二维、无定型的多孔结构，其中F含量高达49.7%。氟化石墨烯丰富的C_F键及其超薄的二维纳米结构有利于Li+在充放电过程中的存储和扩散，因此所制氟化石墨烯具有优异的电化学性能，尤其有较大的功率密度。