Facile fabrication of F-doped biomass carbon as high-performance anode material for potassium-ion batteries

• Three F-doped biomass carbon were prepared by combining PTFE, DAST, HF and hemp. • The fluorinated products showed unexpected morphology and structure. • Products (by PTFE) exhibit the best capacity, rate capability, and lifetime in PIBs. • A lot of defects and high heteroatom content are key merits. Heteroatom doping can effectively improve the electrochemical activity of carbon materials. In this paper, three kinds of fluorine-doped biomass...