Abstract
The polar Co8NiS8/Ni3S2 heterostructures anchored on 3D carbon nanofiber networks (CNFs) were prepared as catalysts modifying the separator of lithium-sulfur batteries. The Co8NiS8/Ni3S2combining the synergistic chemisorption and catalysis effect, can effectively alleviate the shuttle effect, while the CNFs further accelerate the transfer of ions and electrons through the separator. Based on the synergistic effect, the modified Li-S battery delivers a high initial specific capacity of 1532.6 mA h g−1 at 0.1C and a high reversible discharge capacity of 519.7 mA h g−1 at 2C over 500 cycles with 0.061 % decay per cycle.
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