A self-sacrificing template method is a common and straightforward way to synthesize hollow nanomaterials. In this study, a self-sacrificing template method was used for the facile preparation of well-defined hollow SnO₂@C nanoboxes. CaSn(OH)₆ nanocubes, as sacrificial templates, reacted with glucose under hydrothermal conditions to synthesize hollow SnO₂ nanoboxes. The surface of the hollow SnO₂ nanoboxes via the carbonization of polydopamine, resulting in hollow SnO₂@C nanoboxes. The electrochemical performance test confirmed the excellent rate performance (806.5, 785.0, 718.8, 612.4, and 297.8 mA h g⁻¹ at 0.1, 0.2, 0.5 1.0, and 2.0 A g⁻¹, respectively) and outstanding reversible capacity (786.9 mAh g⁻¹ after 100 cycles) of the hollow SnO₂@C nanoboxes. The carbon-coated hollow structured SnO₂ nanoboxes provide buffer space for volume expansion, high electrolyte contact area, and short ion transfer path, resulting in improved cycling stability and rate performance.

自牺牲模板法是合成中空纳米材料的一种常见且直接的方法。在这项研究中，自我牺牲模板方法被用于轻松制备明确定义的空心 SnO ₂ @C 纳米盒。CaSn(OH) ₆纳米立方体作为牺牲模板，在水热条件下与葡萄糖反应合成空心SnO ₂纳米盒。中空 SnO ₂纳米盒的表面通过聚多巴胺的碳化，产生中空 SnO ₂ @C 纳米盒。电化学性能测试证实了优异的倍率性能（806.5、785.0、718.8、612.4 和 297.8 mA h g ^-1在0.1、0.2、0.5 1.0 和 2.0 A g ^-1分别）和中空 SnO ₂ @C 纳米盒的出色可逆容量（100 次循环后为786.9 mAh g ^-1）。碳涂层中空结构的 SnO ₂纳米盒为体积膨胀、高电解质接触面积和短离子传输路径提供缓冲空间，从而提高循环稳定性和倍率性能。