Recent advances in MXene (Ti₃C₂T_x) fibers, prepared from electrically conductive and mechanically strong MXene nanosheets, address the increasing demand of emerging yet promising electrode materials for the development of textile-based devices and beyond. However, to reveal the full potential of MXene fibers, reaching a balance between electrical conductivity and mechanical property is still the fundamental challenge, mainly due to the difficulties to further compact the loose MXene nanosheets. In this work, we demonstrate a continuous and controllable route to fabricate ultra-compact MXene fibers with an in-situ generated protective layer via the synergy of interfacial interactions and thermal drawing-induced stresses. The resulting ultra-compact MXene fibers with high orientation and low porosity exhibit not only excellent tensile strength and ultra-high toughness, but also high electrical conductivity. Then, we construct meter-scale MXene textiles using these ultra-compact fibers to achieve high-performance electromagnetic interference shielding and personal thermal management, accompanied by the high mechanical durability and stability even after multiple washing cycles. The demonstrated generic strategy can be applied to a broad range of nanostructured materials to construct functional fibers for large-scale applications in both space and daily lives.

MXene 的最新进展（Ti ₃ C ₂ T _x) 纤维，由导电和机械强度高的 MXene 纳米片制备而成，可满足对新兴但有前途的电极材料日益增长的需求，以开发基于纺织品的设备及其他领域。然而，要充分发挥 MXene 纤维的潜力，在导电性和机械性能之间取得平衡仍然是基本挑战，主要是由于难以进一步压实松散的 MXene 纳米片。在这项工作中，我们展示了一种连续可控的途径，通过界面相互作用和热拉伸引起的应力的协同作用，制造具有原位生成保护层的超紧凑 MXene 纤维。得到的具有高取向和低孔隙率的超致密 MXene 纤维不仅具有出色的拉伸强度和超高韧性，而且导电率也很高。然后，我们使用这些超致密纤维构建米级 MXene 纺织品，以实现高性能电磁干扰屏蔽和个人热管理，即使在多次洗涤循环后也具有高机械耐用性和稳定性。所展示的通用策略可应用于广泛的纳米结构材料，以构建用于空间和日常生活中大规模应用的功能性纤维。