We propose a van der Waals epitaxial growth method and successfully construct a 2D/2D heterostructure based on graphdiyne (GDY) and Ti₂C₃T_x. In our preparation process, the insertion of monomers and subsequent cross-coupling reactions guarantee the successive and conformal growth of GDY on the Ti₂C₃T_x nanosheets, resulting in the production of large-scale 2D/2D heterojunctions. This new heterojunction highlights the structural advantages and effectively prevents the planar restacking of the Ti₂C₃T_x nanosheets. It also provides numerous accessible channels and active spots for rapid ion transportation and Na⁺ storage. Electrochemical tests demonstrate that these enriched heterojunctions significantly enhance the kinetic behavior for storing the Na⁺, resulting in a six-fold increase in the specific capacity. Our results show that the controllable growth of GDY has significant advantages in the preparation and assembly of 2D/2D heterojunctions. These heterojunctions have great potential in the field of electrochemical energy storage.

中文翻译：

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用于高性能钠离子存储的 2D/2D 异质结的受控生长

我们提出了范德华外延生长方法，并成功构建了基于石墨二炔（GDY）和Ti ₂ C ₃ T _x的2D/2D异质结构。在我们的制备过程中，单体的插入和随后的交叉偶联反应保证了GDY在Ti ₂ C ₃ T _x纳米片上的连续保形生长，从而产生大规模2D/2D异质结。_{这种新的异质结突出了结构优势，有效防止了Ti 2} C ₃ T _x纳米片的平面重新堆叠。它还为快速离子传输和Na ⁺存储提供了许多可访问的通道和活性点。电化学测试表明，这些富集的异质结显着增强了储存 Na ^{+ 的}动力学行为，导致比容量增加了六倍。我们的结果表明，GDY的可控生长在2D/2D异质结的制备和组装中具有显着的优势。这些异质结在电化学储能领域具有巨大的潜力。