Hierarchical nanocomposites that couple downsized 2D materials with carbonaceous functional supports are promising electrode materials for metal ion batteries. Herein, a honeycomb‐like Na‐ion battery (NIB) anode material, which comprises 2D downsized TiS₂ nanocrystals uniformly dispersed in a 3D porous carbon honeycomb, is developed by a vapor phase anion‐exchange reaction of CS₂ with a dual‐template of TiO₂ sealing in hydrogen‐substituted graphdiyne (HsGDY). On the one hand, the 2D downsized TiS₂ nanolayers offer much more accessible active sites for both Na⁺ storage and polysulfide trapping; on the other hand, the 3D porous hollow carbon nanoscale honeycomb not only provides numerous space‐confined nanorooms to reduce the stacking of the tiny 2D TiS₂ nanolayers and suppress the dissolution of polysulfide, but also works as built‐in 3D conductive networks to support the electron/ion transfer and buffer the volume expansion during cycling. In light of this, such a hybrid 3D TiS₂@carbon honeycomb achieves a high reversible capacity with high‐rate and long‐life performance for NIBs.

中文翻译：

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通过气相阴离子交换过程形成的二维TiS2中的高效钠离子存储

将尺寸缩小的2D材料与碳质功能性载体结合在一起的分层纳米复合材料是用于金属离子电池的有前途的电极材料。本文中，通过CS ₂与双模板的气相阴离子交换反应，开发了一种蜂窝状Na离子电池（NIB）阳极材料，它包括均匀分散在3D多孔碳蜂窝中的2D尺寸缩小的TiS ₂纳米晶体。氢取代的石墨二炔（HsGDY）中TiO ₂密封的机理 一方面，二维尺寸缩小的TiS ₂纳米层为Na ⁺储存和多硫化物捕集；另一方面，3D多孔中空碳纳米级蜂窝不仅提供了许多空间受限的纳米空间，以减少微小的2D TiS ₂纳米层的堆叠并抑制多硫化物的溶解，而且还可以作为内置3D导电网络来支持电子/离子转移并在循环过程中缓冲体积膨胀。有鉴于此，这种混合型3D TiS ₂ @碳蜂窝可实现NIB的高可逆容量，并具有高速率和长寿命的性能。