▎ 摘　　要

Fluorinated graphene has a promising application prospect in lithium primary batteries (LPBs) and sodium primary batteries (SPBs). Herein, five fluorinated graphene materials with different fluorine contents (FG-x) are prepared by a large-scale gas fluorination process. It is found that the structural characteristics of FG-x strongly depend on the fluorination temperature: the fluorine content (i.e., F/C ratio) gradually increases with the fluorination temperature rising, resulting in the enlargement of inter-layer spacing and the increase of average bonding strength between C and F. FG-0.75 sample with the intermediate degree of fluorination achieves the maximum energy den sities in LPBs (2239.8 Wh.kg(-1)) and SPBs (1939.2 Wh.kg(-1)). The interlayer distance is critical to the rate capability of FG-x, and FG-0.95 with the largest lattice spacing exhibits the best rate performance in both Li/CFx and Na/CFx batteries. The electrochemical reaction mechanism and the structural evolution of FG material revealed by ex situ X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD) characterization, and in situ Raman spectra further confirm the effect of interlayer distance.