High energy density lithium-sulfur batteries have been greatly suffered by the shuttle effect of lithium polysulfides. In this work, SnO@CoO double hollow spheres are synthesized to form a unique heterojunction structure that can efficiently catalyze and strongly absorb the regulation of polysulfides, which can catalyze the conversion of needle-like polysulfides into flower-like structures when applied in separator modification, effectively blocking the polysulfides in the cathode side and greatly improving the battery performance and cycle stability. At 0.5C current density, the initial discharge specific capacity of SnO@CoO separator battery is 893 mAh g, and its capacity degradation rate is only 0.082 % in 500 turns of cycling. Under harsh conditions (sulfur areal density = 6 mg cm, E/S = 5 μL mg), SnO@CoO separator cells can also achieve an area capacity of 4.03 mAh cm at 0.1C. Additionally, the SnO@CoO separator cells also have high stability and cycling performance at different temperatures.

中文翻译：

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双空心球形SnO2@Co3O4应用于隔膜高效催化锂硫电池中的多硫化物

高能量密度锂硫电池受到多硫化锂穿梭效应的极大影响。本工作合成了SnO@CoO双空心球，形成独特的异质结结构，能够高效催化和强吸收多硫化物的调控，应用于隔膜改性时可以催化针状多硫化物转化为花状结构，有效阻断正极侧的多硫化物，大大提高电池性能和循环稳定性。在0.5C电流密度下，SnO@CoO隔膜电池的首次放电比容量为893 mAh·g，循环500圈后容量衰减率仅为0.082%。在恶劣条件下（硫面密度=6 mg cm，E/S=5 μL mg），SnO@CoO隔膜电池在0.1C下也能实现4.03 mAh cm的面积容量。此外，SnO@CoO隔膜电池在不同温度下还具有较高的稳定性和循环性能。