Fluorinated grapheneasa cathode material for high performance primary lithium ion batteries

A free-standing fluorinated graphene (F-graphene) was fabricated bythesimple 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-prepared F-graphenehas a very high fluorine content (49.7 at%), and an amorphous-like two-dimensional nanostructure. These features facilitate the rapid diffusion of lithium ions during discharging. The F-grapheneexhibits better electrochemical performance, especially, a higher specific power density than the F-graphite.