Based on the confined growth strategy and hydrogen thermal reduction, uniform yolk–shell structured Sn@NHMCSs were designed with metal Sn as the core and mesoporous carbon as the shell. The void between the Sn yolk and carbon shell provides enough buffer space for the expansion of the alloying reaction of Sn, which greatly improves the poor cycling stability of Sn as an anode material in lithium ion batteries. In addition, we observed that tiny particles were still encapsulated in the hollow carbon sphere cavity after the alloying/dealloying reaction.

中文翻译：

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打孔均匀的蛋黄壳型Sn @ N掺杂空心介孔碳球，具有缓冲空间，可提高锂的存储性能。

基于有限的生长策略和氢热还原，设计了以金属锡为核，中孔碳为壳的均匀卵黄壳结构的Sn @ NHMCSs。Sn蛋黄和碳壳之间的空隙为Sn的合金化反应的扩展提供了足够的缓冲空间，这大大改善了作为锂离子电池负极材料的Sn的不良循环稳定性。另外，我们观察到在合金化/脱合金反应之后，微小颗粒仍被包封在空心碳球腔中。