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首页> 外文期刊>RSC Advances >Synthesis of hierarchical Sn/SnO nanosheets assembled by carbon-coated hollow nanospheres as anode materials for lithium/sodium ion batteries
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Synthesis of hierarchical Sn/SnO nanosheets assembled by carbon-coated hollow nanospheres as anode materials for lithium/sodium ion batteries

机译：用碳涂覆的中空纳米球组合的分层SN / SnO纳米片作为锂/钠离子电池的阳极材料

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摘要

Tin-based anode materials have aroused interest due to their high capacities. Nevertheless, the volume expansion problem during lithium insertion/extraction processes has severely hindered their practical application. In particular, nano–micro hierarchical structure is attractive with the integrated advantages of nano-effect and high thermal stability of the microstructure. Herein, hierarchical Sn/SnO nanosheets assembled by carbon-coated hollow nanospheres were successfully synthesized by a facile glucose-assisted hydrothermal method, in which the glucose served as both morphology-control agent and carbon source. The hierarchical Sn/SnO nanosheets exhibit excellent electrochemical performances owing to the unique configuration and carbon coating. Specifically, a reversible high capacity of 2072.2 mA h g ~(?1) was observed at 100 mA g ~(?1) . Further, 964.1 mA h g ~(?1) after 100 cycles at 100 mA g ~(?1) and 820.4 mA h g ~(?1) at 1000 mA g ~(?1) after 300 cycles could be obtained. Encouragingly, the Sn/SnO also presents certain sodium ion storage properties. This facile synthetic strategy may provide new insight into fabricating high-performance Sn-based anode materials combining the advantages of both structure and carbon coating.
机译：锡基阳极材料由于其高容量而引起了兴趣。然而，锂插入/提取过程中的体积膨胀问题严重阻碍了它们的实际应用。特别地，纳米微型等级结构具有吸引力，具有纳米效应的集成优点和微观结构的高热稳定性。这里，通过碳涂覆的中空纳米球组装的分层SN / SnO纳米片通过容易葡萄糖辅助水热方法成功地合成，其中葡萄糖作为形态控制剂和碳源。由于独特的配置和碳涂层，等级Sn / Sno Nanoshss表现出优异的电化学性能。具体地，在100mA g〜（α1）下观察到可逆的高容量为2072.2mA H g〜（α1）。此外，在100mA g〜（α1）的100mA g〜（α1）和820.4 mA H〜（α1）之后，在300 mA g〜（α1）之后，在300 mA g〜（α1）之后，可以获得300次循环。令人鼓舞的是，Sn / Sno还呈现了某些钠离子储存性能。这种容易合成策略可以提供新的洞察，以制造基于高性能Sn基阳极材料，这些阳极材料组合结构​​和碳涂层的优点。

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