To　improve　the　electrochemical　performance　of　fluorinated　carbon　(CFx)　for　lithium-fluorinated　carbon　batteries,　the　nitrogen　and　sulfur　co-doped　sub-fluorinated　carbon　cathode　material　(NS-sCF(x))　is　synthesized　by　a　one-step　method　of　heteroatom　doping　and　defluorination.　Experimental　results　confirm　that　nitrogen　and　sulfur　elements　are　successfully　doped　on　the　surface　of　CFx　material,　and　the　surface　fluorinated　degree　is　reduced.　DFT　calculations　and　experimental　results　demonstrate　that　the　heteroatoms　co-doping　and　defluorination　can　generate　a　conductive　interface,　increase　activation　sites,　and　induce　charge　redistribution,　producing　a　superior　transfer　rate　of　electrons　and　lithium　ions.　Hence,　the　NS-sCF(x)　cathode　material　possesses　excellent　electrochemical　properties,　large　specific　capacity,　high-rate　performance,　high　power　density,　and　no　initial　voltage　delay.　The　Li/NS-sCFx　battery　delivers　a　specific　capacity　of　590.4　mAh.g(-1)　with　a　voltage　plateau　of　1.997　V　at　20　C　without　initial　voltage　delay,　corresponding　to　a　power　density　is　35946　W　kg(-1).　Extraordinarily,　an　ultra-high　power　density　of　up　to　107100　W　kg(-1)　at　70　C　is　achieved　without　significantly　initial　voltage　delay.　This　study　reveals　the　functional　mechanism　of　NS-co-doping　and　defluorination　to　improve　the　electrochemical　performance　of　NS-sCFx　material,　which　can　be　used　as　a　reference　for　the　design　and　development　of　related　electrode　materials.