Abstract
A series of nickel porous carbon (Ni-PC-x, x represents solvothermal temperature) materials with controllable morphology, which has the different catalytic effect of the metallic Ni catalyst derived from Ni-MOF and Li+ transfer efficiency, are designed and synthesized through the simple solvothermal method and pyrolysis. Among the composites, the S/Ni-PC-160 cathode exhibits excellent long-cycle stability (an average capacity fading rate of only 0.14% per cycle for 300 cycles at 1C), and wonderful rate performance with a capacity of 815.5 mAh·g−1 at 1C. The improved performance of S/Ni-PC-160 is attributed to the catalysis derived from Ni nanoparticles and rapid Li+ diffusion from a 3D honeycomb structure. This work provides an important reference value for the potential application of the relationship between morphology and electrochemical performance in LiS batteries.
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