The scalable preparation of 2D nanomaterials is challenging and highly desirable for fundamental interest and practical applications. Herein, an efficient solid‐state method is developed for producing emerging 2D ternary layered metal phosphorus trichalcogenide (MPS₃, M = Fe, Co, Ni) nanosheets on a large scale. The high‐quality MPS₃ single‐crystal nanosheets are exposed with (00l) facets and have an average lateral size of ≈200 nm and an average thickness of ≈18 nm. Moreover, their interlayer spacing can be expanded by intercalating propylamine at room temperature. For Li/Na storage applications, such MPS₃ nanosheets can achieve: i) high specific capacity owing to the intrinsic composition, realizing a theoretical specific capacity higher than the corresponding metal oxides, and ii) superior rate capability due to the large extrinsic pseudocapacitive contribution from surface redox reactions. Remarkably, the propylamine‐intercalated samples show improved Li/Na storage performance due to the better electrical conductivity and enlarged interlayer distance to allow easier ion accessibility and faster ion diffusion. Impressively, the Na‐ion batteries based on the intercalated NiPS₃ nanosheets deliver 1090 and 536 mA h g⁻¹ at 0.05 and 5.0 A g⁻¹, respectively. This work paves the way for developing MPS₃ nanosheets for energy storage and conversion, catalysis, and so on.

中文翻译：

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二维MPS3（M = Fe，Co，Ni）纳米片的常规和可扩展固态合成及其Li / Na储存性能的调整

2D纳米材料的可扩展制备是具有挑战性的，并且对于基本兴趣和实际应用是非常需要的。在本文中，开发了一种有效的固态方法，用于大规模生产新兴的二维三元层状三卤化金属磷（MPS ₃，M = Fe，Co，Ni）纳米片。高质量的MPS ₃单晶纳米片暴露有（00l）刻面，其平均横向尺寸为≈200nm，平均厚度为≈18nm。而且，它们的层间距可以通过在室温下插入丙胺来扩大。对于锂/钠存储应用，例如MPS ₃纳米片可以实现：i）由于固有的组成而具有高的比容量，实现了比相应的金属氧化物更高的理论比容量，并且ii）由于表面氧化还原反应产生的大量外在的假电容贡献，因此具有出众的速率容量。值得注意的是，由于更好的电导率和更大的层间距离，丙胺插层样品显示出改善的Li / Na储存性能，从而使离子可及性和离子扩散更加容易。令人印象深刻的是，基于插入式NiPS ₃纳米片的Na-离子电池在0.05和5.0 A g ^-1下分别提供1090和536 mA hg ^-1。这项工作为开发MPS ₃铺平了道路 用于能量存储和转换，催化等的纳米片。