Conductive Carbon-Wrapped Fluorinated Hard Carbon Composite as High-Performance Cathode for Primary Lithium Batteries

Lithium/carbon fluoride (Li/CFx) batteries have been widely researched due to their high theoretical specific energy. To create a high-performance electrode, the fluorinated hard carbon (FHC) is prepared by direct gas-phase fluorination. It has F/C ratio of 0.95 based on gravimetric method. Selecting (HC) with surface area as source allows for FHC achieve suitable interlayer spacing and area, well abundant pore structures facilitate rapid lithium ion transportation. Additionally, composite graphene nanotubes (CNTs) coated FHC, enhancing electron transport speed. The resulting FHC&C exhibits very energy density 1256 Wh kg−1 an excellent power 72,929 W at rate 40 C. Moreover, compared commercial CFx, higher densities, thus presenting promising practical application prospect.