Metal-organic framework (MOFs) have been regarded as ideal lithium-ion battery (LIB) anodes with abundant active sites, porous structure, shortened ion diffusion pathways, and adjustable component, but the MOF anodes suffer from the low electronic conductivity. Herein, we rationally design a 2D/2D Ti₃C₂T_x/NiCo MOF heterostructure through in-situ growth of ultrathin NiCo MOF nanosheets on the few-layer Ti₃C₂T_x MXene sheets. The carboxylate groups of BDC²⁻ can form stable bond with the termination groups (e.g., -OH) on the Ti₃C₂T_x surface and hydroxyl groups in the lignin molecules, resulting in stable Ti₃C₂T_x/NiCo MOF interface and good structure stability of the 2D/2D Ti₃C₂T_x/NiCo MOF heterostructure. The Ti₃C₂T_x/NiCo MOF heterostructure could combine the advantages of 2D MXene nanosheets and 2D bimetallic MOF structure. The 2D bimetallic NiCo MOF can offer plenty of exposed active sites for Li⁺ intercalation, while the 3D conductive network structure based on the Ti₃C₂T_x can not only enhance the electronic conductivity, but also facilitate the electrode/electrolyte interface contact and promote the charge diffusion. The obtained 2D/2D Ti₃C₂T_x/NiCo MOF heterostructure anode demonstrates a high capacity of 637 mAh g⁻¹ at 0.2 A g⁻¹ after 200 cycles. Furthermore, the Li⁺ intercalation/extraction mechanism of the Ti₃C₂T_x/NiCo MOF heterostructure electrode is explored in detail.

金属有机框架（MOFs）被认为是理想的锂离子电池（LIB）负极，具有丰富的活性位点、多孔结构、缩短的离子扩散路径和可调节的成分，但MOF负极存在电子导电率低的问题。_{在此，我们通过在几层 Ti 3} C ₂ T _x MXene 片上原位生长超薄 NiCo MOF 纳米片，合理地设计了 2D/2D Ti ₃ C ₂ T _x /NiCo MOF 异质结构。BDC ^{2-的羧酸根可以与Ti} ₃ C ₂ T _x上的末端基团（例如-OH）形成稳定的键合。木质素分子中的表面和羟基，导致稳定的Ti ₃ C ₂ T _x /NiCo MOF界面和2D/2D Ti ₃ C ₂ T _x /NiCo MOF异质结构良好的结构稳定性。Ti ₃ C ₂ T _x /NiCo MOF异质结构可以结合二维MXene纳米片和二维双金属MOF结构的优点。2D 双金属 NiCo MOF 可为 Li ⁺嵌入提供大量暴露的活性位点，而基于 Ti ₃ C ₂ T _{x的 3D 导电网络结构}不仅可以增强电子导电性，还可以促进电极/电解质界面接触，促进电荷扩散。获得的 2D/2D Ti ₃ C ₂ T _x /NiCo MOF 异质结构负极在 0.2 A g ^-1循环 200 次后表现出 637 mAh g ^{-1的高容量。}此外，详细探讨了Ti ₃ C ₂ T _x /NiCo MOF异质结构电极的Li ^{+嵌入/脱出机理。}