Thanks to its larger surface and free volume, hollow nanostructure and nanomaterials are one kind of highly desirable electrodes for efficiently enhancing sodium-ion battery performance, especially at high rate. Herein, we demonstrate a design of hierarchical semi-open hollow structure, assembling with molybdenum selenide (MoSe₂) nanosheets embedded on the nitrogen doped carbon matrix. The unique hollow structure can not only enable sufficient electrode/electrolyte interaction and fast electron transportation, but also suppress volume expansion during the insertion/extraction of sodium ion. As a direct outcome, the MoSe₂/carbon anode exhibits excellent cycling and rate performance with a specific capacity of 431 mAh g⁻¹ at 200 mA g⁻¹, maintaining 87.7% capacity after 120 cycles. Notably, a discharge capacity of 199.1 mAh g⁻¹ can be achieved even at an ultra-high current density of 20 A g⁻¹, indicating quick Na⁺ storage ability. The results may open a new way to realize high-rate anode for ion battery applications.

由于其较大的表面和自由体积，中空纳米结构和纳米材料是一种用于高效提高钠离子电池性能（尤其是高倍率）的极受欢迎的电极。在这里，我们演示了一种分层半开放空心结构的设计，该结构与嵌入氮掺杂碳基体上的硒化钼（MoSe ₂）纳米片组装在一起。独特的中空结构不仅可以实现足够的电极/电解质相互作用和快速的电子传输，还可以抑制钠离子的插入/提取过程中的体积膨胀。作为一个直接结果，在摩西₂ /碳阳极表现出优异的循环和速率性能的431毫安g的比容量^-1在200mA克^-1，在120次循环后仍保持87.7％的容量。值得注意的是，即使在20 A g ^-1的超高电流密度下，也可以实现199.1 mAh g ^-1的放电容量，这表明Na ^+的存储能力很快。结果可能为实现离子电池应用中的高倍率阳极开辟新途径。