An ion insertion type in two-dimensional (2D) materials has attracted extensive attention making 2D materials as promising energy storage materials. However, the interlayer spacing plays a key role in the design of 2D materials with fast ions de-intercalation dynamics and high-rate capability. Here, an unprecedented and convenient organic molecular welding approach was proposed to controllably tune different interlayer spacings in Ti₃C₂ MXene layers, resulting in pillar and strain-xDA-Ti₃C₂ structures by a dehydration condensation reaction between diacid molecules (HOOC(CH₂)_nCOOH) and -NH₂ functionalized Ti₃C₂ layers. The xDA molecules can not only tighten the adjacent layers acting as ropes during the ion insertion process but also pillar the adjacent layers when ion extraction process was used to stabilize the Ti₃C₂ structure by suppressing the volume change. Furthermore, the interlayer spacing of xDA-Ti₃C₂ can be controllably tuned from 1.03 to 1.45 nm by choosing xDA with different lengths and controlled interlayer spacings of 1.35 and 1.38 nm can be achieved for the best rate capability of insertion/extraction processes with the superior diffusion coefficient of 4.6 × 10⁻⁷/2.8 × 10⁻⁸ cm²/s in Li⁺/Na⁺ batteries, respectively.

二维（2D）材料中的离子插入类型引起了广泛关注，使二维材料成为有前途的储能材料。然而，层间距在具有快速离子脱嵌动力学和高倍率能力的二维材料的设计中起着关键作用。在这里，提出了一种前所未有且方便的有机分子焊接方法来可控地调整 Ti ₃ C ₂ MXene 层中的不同层间距，通过二酸分子（HOOC）之间的脱水缩合反应产生柱状和应变-x DA-Ti ₃ C ₂结构(CH ₂ ) _n COOH) 和 -NH ₂功能化的 Ti₃ C ₂层。的X DA分子不能只拧入相邻的层作为绳索在离子插入过程，而且支柱时离子提取过程中使用，以稳定的Ti相邻的层₃ c ^ ₂通过抑制体积变化结构。此外，x DA-Ti ₃ C ₂的层间距可以通过选择不同长度的x DA可控地从 1.03 调整到 1.45 nm，并且可以实现 1.35 和 1.38 nm 的受控层间距，以获得最佳的插入/提取倍率能力具有 4.6 × 10 ^-7 /2.8 × 10优越扩散系数的工艺分别在 Li ⁺ /Na ⁺电池中为⁻⁸ cm ² /s 。