Abstract SnS-based materials show great potential as high-capacity anode candidates of Li-ion batteries owing to their dual-mechanisms of conversion and alloying reactions. However, the practical application is substantially hampered by its poor electrochemical utilization and stability. Herein, we demonstrate three-dimensional SnS/C microflowers prepared by a controllable self-polymerization and carbonization of polydopamine-coated SnS 2 precursors. The building nanosheet consists of uniform encapsulation of ultrafine SnS nanoparticles into the conductive carbon framework. Benefiting from the nanoscaled building blocks and the porous three-dimensional architecture, the carbon-encapsulated nano-SnS microflowers show a significant enhancement in the electrochemical reaction kinetics and durability. As a result, the hybrid exhibits a high specific capacity of ∼1000 mAh g −1 at 0.1 A g −1 with a high initial Coulombic efficiency of 84.2%, good rate capability, and stable cyclability. The present work provides a reliable strategy for the rational fabrication of carbon-encapsulated SnS composites for high-performance Li-ion batteries.

中文翻译：

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由碳包封的 SnS 纳米片组装的三维微花具有优异的锂离子存储性能

摘要 SnS 基材料由于其转化和合金化反应的双重机制，作为锂离子电池的高容量负极候选材料显示出巨大的潜力。然而，其电化学利用率和稳定性差，大大阻碍了实际应用。在此，我们展示了通过可控的自聚合和碳化聚多巴胺包覆的 SnS 2 前体制备的三维 SnS/C 微花。构建纳米片由将超细 SnS 纳米粒子均匀封装到导电碳框架中组成。受益于纳米级积木和多孔三维结构，碳包封的纳米 SnS 微花在电化学反应动力学和耐久性方面显示出显着增强。因此，该混合物在 0.1 A g -1 时表现出约 1000 mAh g -1 的高比容量，具有 84.2% 的高初始库仑效率、良好的倍率性能和稳定的循环性能。目前的工作为合理制造用于高性能锂离子电池的碳包封 SnS 复合材料提供了可靠的策略。