Construction of heterogeneous nanostructures for electrode materials has been considered as an efficient approach to improve the associated electrochemical performance, it is thus crucial to rationally design favorable heterostructures and engineer the interface of two phases. We herein report the elaborately design and fabrication of heterostructured nanohybrids with ZnS and carbon coating Cu₂S nanoplates (Cu₂S@ZnS/C). Such distinctive nanostructures develop the advance heterostructures with carbon decorating can remarkably accelerate electron transfer and ionic diffusion kinetics while guarantee the structural integrity upon sodium ion storage. With these merits, the Cu₂S@ZnS/C nanohybrid exhibits outstanding electrochemical performance with a high reversible capacity of 352 mAh g⁻¹ at 10 A g⁻¹ and long cycle stability with 94.7% capacity retention after 1000 cycles. Electrochemical kinetic analysis and Density functional theory (DFT) calculations demonstrate the decreased ions diffusion energy barrier for expediting electrochemical kinetics. Of note, the proof-of-concept 3D printed sodium ion batteries have been set up by coupling the 3D printed Cu₂S@ZnS/C anode with 3D printed Na₃V₂(PO₄)₃ cathode, which are capable of delivering high and stable capacity output.

构建电极材料的异质纳米结构被认为是提高相关电化学性能的有效方法，因此合理设计有利的异质结构和设计两相界面至关重要。我们在此报告了具有 ZnS 和碳涂层 Cu ₂ S 纳米片（Cu ₂ S@ZnS/C）的异质结构纳米杂化物的精心设计和制造。这种独特的纳米结构开发出具有碳装饰的先进异质结构，可以显着加速电子转移和离子扩散动力学，同时保证钠离子存储时的结构完整性。凭借这些优点，Cu ₂S@ZnS/C 纳米杂化物表现出优异的电化学性能，在 10 A g ^-1时具有 352 mAh g ^-1的高可逆容量和长循环稳定性，1000 次循环后容量保持率为 94.7%。电化学动力学分析和密度泛函理论 (DFT) 计算表明离子扩散能垒降低，可加速电化学动力学。值得注意的是，概念验证的 3D 打印钠离子电池是通过将 3D 打印的 Cu ₂ S@ZnS/C 阳极与 3D 打印的 Na ₃ V ₂ (PO ₄ ) ₃阴极相结合而建立的，这些阴极能够提供高稳定的容量输出。