【摘要】 锂硫电池在电动汽车、无人机等领域受到极大的关注，因其环境友好、材料成本低、理论容量高等特点而被广泛研究，但因硫的导电性能不佳、多硫化物的穿梭效应以及充放电过程中硫的体积变化等阻碍了锂硫电池的商业化。为改善硫不良的导电性及多硫化物的穿梭效应，基于碳材料优异的导电性与氧化物较强的吸附性，采用水合肼在CNT表面还原氯化镍，通过热处理后得到NiO/CNT复合物作为硫的载体，充当电池的正极。物理及电化学表征的结果表明，多孔结构的NiO/CNT比表面积达到48.49 m²·g^-1,在电流密度为1C下，NiO/CNT的首圈比容量达到825 mAh·g^-1,循环100圈后，比容量保持在617 mAh·g^-1且库伦效率在99.3%以上，说明两种材料的复合提高了电池库伦效率和循环性能。更多还原

【Abstract】 Lithium-sulfur batteries have gained numerous attention due to its environmental friendliness, low material cost and high theoretical capacity. But the shuttle effect of the sulfides, poor conductivity of sulfur and volume expansion of sulfur hindered their commercialization. Therefore, based on the high conductivity of the carbon materials and the sulfide inhibition by oxides, hydrazine hydrate was used to reduce nickel chloride on CNT surface. After heat treatment, NiO/CNT was obtained as the sulfur host. The results show that NiO/CNT delivers a specific surface area of 48.49 m²·g^-1 with a porous structure, the capacity of Li-S battery with NiO/CNT reaches 825 mAh·g^-1 in the first cycle and remains 617 mAh·g^-1 after 100 cycles at 1C, and the Coulomb efficiency exceeds 99.3%. This indicates that NiO/CNT improves the Coulomb efficiency and cycle performance.更多还原