The quality of the interface of the MnCO₃-based composite electrode materials determines the application of these high-capacity anodes with abundant raw materials, non-toxic, and high thermal stability in the next generation of lithium-ion batteries. In this work, by strengthening the interface effect of composite materials, MXene encapsulated MnCO₃ with spindle morphology is designed via a simple and universal two-step process involving hydrothermal synthesis and sonicated assembly in order to overcome the low conductivity and the volume change during charging and discharging of MnCO₃. Spindle MnCO₃ is formed using excessive salicylic acid (SA) as reducing agent, and encapsulated with MXene through hydrogen bonds. The MXene as a coating layer effectively inhibits the volume expansion of MnCO₃ during charging and discharging depending on its flexible mechanical property, and improves the capacitance storage of MnCO₃ due to its high electronic conductivity and fast Li⁺ transport capability. Therefore, MnCO₃@MXene as a lithium-ion battery anode improves cycling capabilities with the capacity retention ratio of 91.2% at 5 A g⁻¹ after 2000 cycles. The strategy of preparing MnCO₃ and MXene composite materials through self-assembly of hydrogen bonds to enhance the interface effect has a good application prospect in the design of energy storage materials.

MnCO ₃基复合电极材料的界面质量决定了这些具有高原料，无毒和高热稳定性的高容量阳极在下一代锂离子电池中的应用。在这项工作中，通过增强复合材料的界面效应，通过简单通用的两步工艺（包括水热合成和超声处理）来设计具有纺锤形的MXene封装的MnCO ₃，以克服充电过程中的低电导率和体积变化和MnCO _3的排放。主轴MnCO ₃使用过量的水杨酸（SA）作为还原剂形成的苯并噻吩并通过氢键与MXene一起包封。MXene作为涂层，取决于其灵活的机械性能，可有效抑制MnCO ₃在充放电过程中的体积膨胀，并由于其高电导率和快速的Li ⁺传输能力而改善了MnCO ₃的电容存储。因此，作为锂离子电池阳极的MnCO ₃ @MXene改善了循环性能，在2000次循环后，在5 A g ^-1下的容量保持率为91.2％。制备MnCO ₃的策略 而MXene复合材料通过氢键的自组装增强界面作用，在储能材料设计中具有良好的应用前景。