Double transition metal carbides (MXenes) are considered promising candidates for a good electrode material because of their enormous specific surface area, metallic conductivity and hydrophilicity. However, their low capacity, easy oxidation and self-restacking restrict their large-scale application. In this paper, we selected Mo₂TiC₂T_x MXene as the conductive carrier of polyoxometalate (POM), carbon nanotubes (CNTs) as the linker to construct a novel POM@polyaniline (PANI)/Mo₂TiC₂T_x/CNTs quaternary composites (denoted as PPMC) with a unique 3D structure by using a facile one pot synthesis strategy. The PPMC with unique 3D structure as an anode material for LIBs exhibits superior lithium storage capacity (621 mAh g⁻¹ at 0.1 A g⁻¹) and promising cyclic stability (445 mAh g⁻¹ after 1000 periods at 1.0 A g⁻¹) and good rate capability. The enhanced performance is mainly attributed to the synergistic effect between components. Our work provides an effective strategy to improve the reversibility and cycling stability of electrode materials for LIBs, which will contribute some reference value to the development of high-performance MXene based electrode materials.

双过渡金属碳化物（MXenes）因其巨大的比表面积、金属导电性和亲水性而被认为是良好电极材料的有希望的候选者。然而，它们的容量低、易氧化和自重堆限制了其大规模应用。本文选择Mo ₂ TiC ₂ T _x MXene作为多金属氧酸盐(POM)的导电载体，碳纳米管(CNTs)作为连接体，构建了新型POM@聚苯胺(PANI)/Mo ₂ TiC ₂ T _x /CNTs通过使用简单的一锅合成策略，获得具有独特3D结构的四元复合材料（表示为PPMC）。具有独特3D结构的PPMC作为锂离子电池负极材料表现出优异的储锂容量（ 0.1 A ^{g -1下为621 mAh g -1}）和良好的循环稳定性（ ^{1.0 A g -1}下1000次后为^{445 mAh g -1}）和良好的速率能力。性能的增强主要归因于组分之间的协同效应。我们的工作为提高LIB电极材料的可逆性和循环稳定性提供了有效的策略，这将为高性能MXene基电极材料的开发提供一定的参考价值。