Hollow ternary metal oxides have shown enormous potential in lithium-ion batteries (LIBs), which is ascribed to their complex chemical composition, abundant active defect sites, and the synergy effect between metals. In this work, we synthesized Mo-doped NiCo₂O₄ porous spheres with yolk-shell structure by using a simple self-templating method. Surprisingly, other than the yolk-shell structure we had obtained, the inner core of the yolk-shell was also porous, which could fully enhance the electrolyte infiltration and promote the transmission of lithium ions (Li⁺) and electrons (e⁻). The diameter of the porous core in the yolk-shell sphere was about 530 nm, and the outer shell's thickness was up to 110 nm. In addition, the unique pores in the core appeared in the diameter of about 85 nm. With this structure, the volume expansion of the anode could be well inhibited during charge/discharge. It exhibited prominent electrochemical performance with high reversible capacity (1338 mA h g⁻¹ at 100 mA g⁻¹), satisfactory cycle life (1360 mA h g⁻¹ after 200 cycles at 100 mA g⁻¹), and exceptional rate capability (820 mA h g⁻¹ at 2000 mA g⁻¹) as anode material in LIBs.

空心三元金属氧化物在锂离子电池（LIBs）中显示出巨大的潜力，这归因于其复杂的化学成分、丰富的活性缺陷位点以及金属之间的协同效应。在这项工作中，我们使用简单的自模板方法合成了具有蛋黄-壳结构的Mo 掺杂的 NiCo ₂ O ₄多孔球。令人惊讶的是，除了我们获得的蛋黄-壳结构外，蛋黄-壳的内核也是多孔的，可以充分增强电解质的渗透，促进锂离子（Li ⁺）和电子（e ^-）的传输。）。蛋黄-壳球体中多孔核的直径约为530 nm，外壳的厚度可达110 nm。此外，核中独特的孔隙出现在直径约 85 nm 处。采用这种结构，可以很好地抑制充放电过程中负极的体积膨胀。它表现出突出的电化学性能与高可逆容量（1338毫安汞柱^-1在100mA克^-1），令人满意的循环寿命（1360毫安汞柱^-1后以100mA克200个周期^-1），和特殊的速率能力（820毫安hg ^-1 at 2000 mA g ^-1 ) 作为 LIB 中的阳极材料。