Rechargeable lithium-sulfur (Li-S) batteries, with a theoretical specific energy (2600 Wh kg^-1) and theoretical specific capacity (1675 mAh g^-1), are superior to current commercial lithium ion batteries. However, severe capacity fading due to volume breath and polysulfide dissolution greatly hinders the commercialization of Li-S battery. As an attempt to solve the problem, a hollow MnO₂ spheres/porous reduced graphene oxide/S (MnO₂/RGO/S) composite was synthesized by an one-step hydrothermal method, of which the hollow MnO₂ spheres can effectively restrains the volume expansion/contraction of S₈ and the dissolution of polysulfides during the charge-discharge processes. Furthermore, 3D RGO with high electronic conductivity can facilitates a fast electronic transfer. The initial specific capacity of the MnO₂/RGO/S composite is 1202.0 mAh g^-1 and remains 577.0 mAh g^-1 with the coulombic efficiency of 93.2% at 0.2C after 200 cycles, and the capacity retention remains higher than 61.4% of the initial capacity after 100 cycles at 1 C, indicating a synergistic effect of hollow MnO₂ spheres and conductive 3D RGO.

具有理论比能量（2600 Wh kg ^-1）和理论比容量（1675 mAh g ^-1）的可充电锂硫（Li-S）电池优于目前的商用锂离子电池。然而，由于体积呼吸和多硫化物溶解而导致的严重的容量衰减大大阻碍了Li-S电池的商业化。为了解决该问题，通过一步水热法合成了空心MnO ₂球/多孔还原氧化石墨烯/ S（MnO ₂ / RGO / S）复合材料，该空心MnO ₂球可以有效地抑制金属氧化物的产生。 S _8的体积膨胀/收缩以及在充放电过程中多硫化物的溶解。此外，具有高电子传导性的3D RGO可以促进快速电子传输。MnO ₂ / RGO / S复合材料的初始比容量为1202.0 mAh g ^-1，在200次循环后于0.2C时仍为577.0 mAh g ^-1，库伦效率为93.2％，并且容量保持率仍高于61.4％。在1 C下经过100次循环后的初始容量，表明空心MnO ₂球和导电3D RGO具有协同作用。