Recently, Li-O₂ batteries have been considered to be promising next-generation energy storage devices owing to their high theoretical specific energy. However, due to the sluggish reaction kinetics of oxygen conversion, practical applications cannot achieve the desired results. By introducing vacancies in the MoS₂ basal plane and using an in-situ synthesis method, we demonstrated the excellent catalysis of MoS_2−x for oxygen redox kinetics, which can improve Li-O₂ battery performance. The prepared MoS_2−x displays little polarization, with a potential gap of 0.59 V and a high discharge capacity of 8,851 mA h g⁻¹ at a current density of 500 mA g⁻¹. The improved performance is mainly attributable to abundant S defects and plentiful diffusion channels in the MoS_2−x/carbon 3D structural cathodes, which enable the adsorption of gaseous oxygen, reaction intermediates, and discharge products. To the best of our knowledge, these structures fabricated through 3D network design and surface modulation are among the best oxygen conversion catalysts developed so far, offering a new vista for the design of Li-O₂ catalysts and beyond.

近年来，由于Li-O ₂电池具有较高的理论比能量，因此被认为是有前途的下一代能量存储设备。但是，由于氧转化反应的反应动力学缓慢，实际应用无法获得所需的结果。通过在MoS ₂基础平面中引入空位并使用原位通过合成方法，我们证明了MoS _2-x对氧还原氧化动力学的出色催化作用，可以改善Li-O ₂电池的性能。所制备的MoS _2-x在电流密度为500 mA g ^{-1的情况下}几乎没有极化，具有0.59 V的电势差和8881 mA hg ^-1的高放电容量。性能的提高主要归因于MoS _2-x中大量的S缺陷和大量的扩散通道/碳3D结构阴极，可吸附气态氧，反应中间体和放电产物。据我们所知，通过3D网络设计和表面调制制造的这些结构是迄今为止开发的最佳的氧气转化催化剂，为Li-O ₂催化剂的设计和开发提供了新的前景。