The rational design and assembly specific structures consisting of multiple components with distinctive features are promising strategies for developing advanced materials for efficient sodium storage. Herein, a novel hierarchical sandwich-liked structure MoSe₂ nanosheet array is designed and synthesized, in which MoSe₂ nanosheet through strong interfacial interaction is encapsulated in two dimensional carbon framework that improves electrical conductivity and Na⁺ diffusion kinetic. Moreover, the carbon protective layer reinforces the stability of structure and maintains electrochemical activity during long-term charging/discharging process. The density functional theory calculation (DFT) further confirms carbon incorporation can reduce Na⁺ diffusion energy barrier for enhancing the reaction kinetics. With the obtained NC/MoSe₂@NC as free-standing electrodes for SIBs, it achieves a reversible capacity of 632 mAh g⁻¹ at 0.2 A g⁻¹, or actual capacity of 421 mAh g⁻¹ by removing contributed capacity of the carbon cloth substrate, and excellent long cycling stability. By matching with Na₃V₂(PO₄)₃/C cathode, the sodium full cell displays a high energy density of 186.2 Wh kg⁻¹ with a power density of 121.2 W kg⁻¹. This current design and fabrication strategy manifests promising prospect for exploring efficient electrode materials for sodium storage.

由具有独特特征的多个组件组成的合理设计和组装特定结构是开发用于高效储钠的先进材料的有前途的策略。在此，设计并合成了一种新型的分层夹层状结构 MoSe ₂纳米片阵列，其中通过强界面相互作用将 MoSe ₂纳米片封装在二维碳骨架中，从而提高了电导率和 Na ⁺扩散动力学。此外，碳保护层增强了结构的稳定性，并在长期充电/放电过程中保持电化学活性。密度泛函理论计算 (DFT) 进一步证实碳掺入可以减少 Na ⁺用于增强反应动力学的扩散能垒。使用获得的 NC/MoSe ₂ @NC 作为 SIBs 的独立电极，它在 0.2 A g ^{-1 下}实现了 632 mAh g ^-1的可逆容量，或通过去除贡献的容量实现了421 mAh g ^-1的实际容量。碳布基材，以及优异的长循环稳定性。通过与Na ₃ V ₂ (PO ₄ ) ₃ /C阴极匹配，钠全电池显示出186.2 Wh kg ^-1的高能量密度和121.2 W kg ^-1的功率密度. 这种当前的设计和制造策略显示出探索用于钠存储的有效电极材料的广阔前景。