Despite having the capability of achieving high energy densities, low cost and environment friendliness, the rechargeable Lithium-Sulfur (Li-S) batteries still suffer from many inherent disadvantages such as poor electrical conductivity and polysulfide shuttle effect. To address these issues, we have successfully designed a freestanding graphitic porous carbon nanofibers piece, which can accommodate high sulfur loading up to 70%, and be served as the polysulfides reservoirs to alleviate shuttle effect. Furthermore, the 3D graphitic porous carbon nanofibers can facilitate the diffusion and transport of electrons and ions owing to the superior electrical conductivity and interconnected porous nature resulting in improved electrochemical performance. The obtained sulfur and porous carbon nanofibers (S@P-CNFs) composite cathode shows high rate capability of 670 mAh g −1 at 2 C and excellent cycling stability of 720 mAh g −1 after 200 cycles at 1C.
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