Currently, common two-dimensional (2D) carbon materials composited with Si-based materials as anode for lithium-ion batteries exhibit excellent electrochemical properties. In this study, we presented a one-step synthesis of amino-functionalized mesoporous silica (SiO2) nanospheres through self-assembly. Morphology modulation and amino group grafting were performed simultaneously without secondary modification. Using tartaric acid and melamine as dual carbon sources, the 2D lamellar structure was constructed using the dehydration condensation reaction, with the mesoporous SiO2 nanospheres uniformly intercalated within the carbon sheets. The composites were securely bonded by chemical attraction, effectively addressing the issue of structural collapse often encountered in silica–carbon composites. Ultimately, the lamellar SiO2@NC composite exhibited stable capacity of 539.5 mAh g−1 after 500 cycles at 1 A g−1. This strategy is simple and effective, compared to the complex processes typically associated with 2D carbon materials synthesis, and can be potentially extended to applications in catalysis, adsorption, and separation within diverse fields.

中文翻译：

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通过在二维层状碳负载的介孔 SiO2 纳米球中实现氨基官能化来增强储锂性能


目前，常见的二维 （2D） 碳材料与硅基材料复合作为锂离子电池的负极表现出优异的电化学性能。在这项研究中，我们提出了一种通过自组装一步合成氨基功能化介孔二氧化硅 （SiO2） 纳米球的方法。形态调节和氨基接枝同时进行，无二次修饰。以酒石酸和三聚氰胺为双碳源，利用脱水缩合反应构建二维层状结构，介孔 SiO2 纳米球均匀嵌入碳片内。复合材料通过化学吸引力牢固粘合，有效解决了二氧化硅-碳复合材料中经常遇到的结构坍塌问题。最终，层状SiO2@NC复合材料在 1 A g-1 下循环 500 次后表现出 539.5 mAh g-1 的稳定容量。与通常与 2D 碳材料合成相关的复杂过程相比，这种策略简单而有效，并且有可能扩展到不同领域的催化、吸附和分离应用。