One pot synthesis of polyoxometalate@polyaniline/MXene/CNTs quaternary composites with a 3D structure as efficient electrode materials for Li-ion batteries applications

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 Mo2TiC2Tx MXene as the conductive carrier of polyoxometalate (POM), carbon nanotubes (CNTs) as the linker to construct a novel POM@polyaniline (PANI)/Mo2TiC2Tx/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.