The weak bonding of A atoms with MX layers in MAX phases not only enables the selective etching of A layers for MXene preparation but brings about the chance to construct A derivatives/MXene composites via in‐situ conversion. Here, a facile and general gas‐solid reaction systems are elegantly devised to construct multi‐dimensional MXene based composites including AlF3 nanorods/MXene, AlF3 nanocrystals/MXene, amorphous AlF3/MXene, A filled carbon nanotubes/MXene, layered metal chalcogenides/MXene, MOF/MXene, and so on. The intrinsic effect mechanism of interlayer confinement towards crystal growth, catalytic behavior, van der Waals‐heterostructure construction and coordination reaction are rationally put forward. The tight interface combination and synergistic effect from distinct components make them promising active materials for electrochemical applications. More particularly, the AlF3 nanorods/Nb2C MXene demonstrate bi‐directional catalytic activity toward the conversion between Li2S and lithium polysulfides, which alleviates the shuttle effect of lithium‐sulfur batteries.

中文翻译：

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通过气固反应直接从 MAX 相原位构建功能性多维 MXene 基复合材料


MAX相中A原子与MX层的弱键合不仅能够选择性蚀刻A层以制备MXene，而且为通过原位转换构建A衍生物/MXene复合材料提供了机会。在这里，设计了一种简单通用的气固反应系统来构建多维 MXene 基复合材料，包括 AlF3 纳米棒/MXene、AlF3 纳米晶体/MXene、无定形 AlF3/MXene、A 填充碳纳米管/MXene、层状金属硫属化物/MXene 、MOF/MXene 等。合理提出了层间限域对晶体生长、催化行为、范德华异质结构构建和配位反应的内在影响机制。紧密的界面组合和不同成分的协同效应使它们成为电化学应用中很有前景的活性材料。更具体地说，AlF3纳米棒/Nb2C MXene对Li2S和多硫化锂之间的转化表现出双向催化活性，从而减轻了锂硫电池的穿梭效应。