Lithium-sulfur batteries have been regarded as the next-generation rechargeable batteries due to their high theoretical energy density and specific capacity.Nevertheless,the shuttle effect of lithium polysulfides has ...Lithium-sulfur batteries have been regarded as the next-generation rechargeable batteries due to their high theoretical energy density and specific capacity.Nevertheless,the shuttle effect of lithium polysulfides has hindered the development of lithium-sulfur batteries.Herein,a novel zirconium-based metal-organic framework-801 film on carbon cloth was developed as a versatile interlayer for lithium-sulfur batteries.This interlayer has a hierarchical porous structure,suitable for the immobilization of lithium polysulfides and accommodating volume expansion on cycling.Moreover,the MOF-801 material is capable of strongly adsorbing lithium polysulfides and promoting their catalytic conversion,which can be enhanced by the abundant active sites provided by the continuous structure of the MOF-801 films.Based on the above advantages,the lithium-sulfur battery,with the proposed interlayer,delivers an initial discharge capacity of 927 mAh·g^(-1) at 1 C with an extremely low decay rate of 0.04%over 500 cycles.Additionally,a high area capacity of 4.3 mAh·cm^(-2) can be achieved under increased S loading.展开更多
基金support from the Natural Science Foundation of Hebei Province(Grant Nos.B2019202289,B2019202199)‘Hundred Talents Program’of Hebei Province(Grant NO.E2019050013)the National Natural Science Foundation of China(Grant No.21908039).
文摘Lithium-sulfur batteries have been regarded as the next-generation rechargeable batteries due to their high theoretical energy density and specific capacity.Nevertheless,the shuttle effect of lithium polysulfides has hindered the development of lithium-sulfur batteries.Herein,a novel zirconium-based metal-organic framework-801 film on carbon cloth was developed as a versatile interlayer for lithium-sulfur batteries.This interlayer has a hierarchical porous structure,suitable for the immobilization of lithium polysulfides and accommodating volume expansion on cycling.Moreover,the MOF-801 material is capable of strongly adsorbing lithium polysulfides and promoting their catalytic conversion,which can be enhanced by the abundant active sites provided by the continuous structure of the MOF-801 films.Based on the above advantages,the lithium-sulfur battery,with the proposed interlayer,delivers an initial discharge capacity of 927 mAh·g^(-1) at 1 C with an extremely low decay rate of 0.04%over 500 cycles.Additionally,a high area capacity of 4.3 mAh·cm^(-2) can be achieved under increased S loading.
