Hybrid Mg/Li-ion Batteries (MLIBs) combine both the advantages of fast alkali metal ions intercalation cathode and dendrite-free Mg anode that exhibits satisfactory electrochemical performance. However, achieving superior comprehensive battery performance is still a main challenge for MLIBs. Novel hollow opening nanoflower MoS₂-CuS-EG (HONF-MoS₂-CuS-EG) cathode with unique structure as MLIBs cathode was firstly fabricated via a facile hydrothermal method and superior comprehensive electrochemical performances are presented. Constructed by increased interlayer distance MoS₂, metallic-like conductivity CuS and superior electrical conductivity EG, high discharge capacity and superior rate performance are demonstrated by HONF-MoS₂-CuS-EG electrode. The volume expansion/contraction during charge-discharge cycles can be effectively buffered by EG and superior cycle stability. The discharge capacity at 10th cycle is as high as 240.6 mAh·g⁻¹, which increases over the 1st cycle by 8.6% at 50 mA·g⁻¹. The discharge capacities at 200 and 1000 mA·g⁻¹ are 201.4 and 117.5 mAh·g⁻¹. The capacity retention rates after 100 cycles (172.4 mAh·g⁻¹) and 200 cycles (73.5 mAh·g⁻¹⁾ for HONF-MoS₂-CuS-EG electrode at 50 mA·g⁻¹ are 47.43% and 22.22%, which are much higher than those of hollow close nanoflower MoS₂ (HCNF-MoS₂) cathode (2.81% and 1.95%). As high as 262.5 mAh·g⁻¹ discharge capacity with 91.6% capacity retention of HONF-MoS₂-CuS-EG at 500 mA·g⁻¹ and 150 cycles is presented, indicating that increasing current density is favor to cycle performance of HONF-MoS₂-CuS-EG cathode. The electrochemical mechanism of HONF-MoS₂-CuS-EG electrode in MLIBs is also elaborated. This work provides a practical approach to construct advanced MoS₂-based cathode materials for MLIBs.

混合Mg / Li离子电池（MLIB）结合了快速碱金属离子嵌入阴极和无枝晶Mg阳极的双重优点，展现出令人满意的电化学性能。但是，实现卓越的全面电池性能仍然是MLIB的主要挑战。首先通过简便的水热法制备了具有独特结构的新型空心开口纳米花MoS ₂ -CuS-EG（HONF-MoS ₂ -CuS-EG）阴极，并提出了优异的综合电化学性能。由增加的层间距离MoS _2构成，HONF-MoS ₂证明了类金属电导率CuS和优异的电导率EG，高放电容量和优异的倍率性能-CuS-EG电极。EG和出色的循环稳定性可以有效地缓冲充放电循环中的体积膨胀/收缩。第10次循环的放电容量高达240.6 mAh·g ^-1，在第1次循环的50 mA·g ^-1下增加了8.6％。200和1000mA·g ^-1下的放电容量为201.4和117.5mAh·g ^-1。HONF-MoS ₂ -CuS-EG电极在50 mA·g ^-1下100次循环（172.4 mAh·g ^-1）和200次循环（73.5 mAh·g ^-1）后的容量保持率为47.43％和22.22％，远高于空心纳米花MoS ₂（HCNF-MoS ₂）阴极（2.81％和1.95％）。在500 mA·g ^-1和150次循环下，HONF-MoS ₂ -CuS-EG的放电容量高达262.5 mAh·g ^-1，保持了91.6％的容量，表明电流密度的提高有利于HONF-MoS ₂ -MoS ₂ -CuS-EG阴极。阐述了MLIBs中HONF-MoS ₂ -CuS-EG电极的电化学机理。这项工作为构建用于MLIB的先进的基于MoS ₂的阴极材料提供了一种实用的方法。