Facile Carbon Fluoride/Sulfur Hybrid Cathode for High‐Rate Lithium Batteries

Abstract A win‐win design and application of carbon fluoride/sulfur (CF x /S) hybrid cathode is demonstrated successfully for both high‐rate primary lithium/carbon fluoride battery and secondary lithium sulfur (Li−S) battery for the first time. Ex situ X‐ray diffraction and Raman analyses are involved to shed light on the discharge mechanism of the CF x /S cathode. The maximum power density breaks through 32023 W kg −1 within the primary discharge by the low fluorine content CF x /S cathode. The high‐fluorine content one can retain an appreciable reversible capacity after 200 cycles at ultra‐fast rate of over 10 C. To the best of our knowledge, it is the first time investigating the effect of CF x as a sulfur carrier in Li−S batteries. This facile and effective strategy of CF x /S hybrid cathode opens a new avenue for high performance lithium batteries.